Thursday, September 9, 2010

Planted Cloud is Live!

Allow me to introduce my new blogging home: Planted Cloud

Though I had promised earlier to name my new blog, DC, Plants and Other Stuff, I've decided to blog on a more global scale.  I've been too lucky to travel so much to simply blog about one city's horticultural offerings.  I'm also looking for contributors to post on a monthly level -- if you are interested, please email me.

Thank you, dear reader, for visiting this site.  I've enjoyed blogging NYPAOS more than I ever expected.  I've been neglectful this summer, but hope to make it up to you at my new home.


Friday, August 6, 2010

Excuses, Excuses


Forgive me (SO MUCH) for not blogging for an entire month.  It's terrible!  Some of you know I am in transition.  I started my own office, Jennifer Horn Landscape Architecture, this year and things are getting quite hectic.  I also have moved to DC which makes this blog title a little inaccurate. 

I think I have finally figured out a new title (ultimately, I decided against DC, Plants and Other Stuff) and hope to launch in the next week.  Please be sure to visit me for the link when it finally is ready for viewing.



Tuesday, June 29, 2010

Mauna Kea and Hawaiian Blueberry

One of the places I absolutely *had* to visit when I was on the Big Island was Mauna Kea, Hawaii's tallest mountain, reaching a height of 13,900' above sea level. Technically, it's the world's biggest mountain, measuring 30,000' from the base, which is at the bottom of the sea, to the tip.

It's also the site of the world's largest astronomical observatory, with 13 telescopes representing 11 different countries. The air in this microclimate is the some of the driest on earth, second only to Antarctica. This, in addition to the absence of cloud cover and light pollution, makes for excellent astronomical viewing conditions.

Warned that going to the summit individually is quite difficult (you definitely need four-wheel drive) and reluctant to bring a bunch of winter gear with me from the mainland (it's a chilly 32° at the summit) I signed up for a tour with Mauna Kea Summit Adventures. The tour picked me up at 4pm, and along with about 12 other people, we had a picnic dinner at the visitors center (elevation 9000') before going to the summit for sunset.

After the sunset, we descended back to 9000' for some stargazing. I saw Saturn and its rings, the Omega Centauri, constellations Sagittarius, Virgo and Leo, as well as the beautiful binary star, Albireo. We also learned a fair amount about night viewing and general astronomy. It was an excellent tour and quite educational. By the time I got back to the hotel, nearing midnight, I was more than a little awestruck by how truly insignificant we are and by the incomprehensible age of the galaxies. (Light years, as a concept, always trips me up. The Omega Centauri is around 15,000 light years away. I see it, but because of its distance, it may not really be there anymore. Only in 15,000 years could someone know if it existed in 2010. Discussing this brain-bending concept with the tour guide, he quipped, 'I think that's why insanity is more common among quantum physicists and astronomers.' ...I can't verify that, but can imagine that the sense of profound insignificance, combined with the fact that - in such a profession - you ask questions that can never be truly answered, may be a bit maddening at times.)

I suppose that's why I prefer plants. There aren't a lot in this biome, but there were enough. I saw the plant below when we stopped for a photo-op at around 11,000'. Does it look familiar to any east coasters?

Those bell-shaped flowers are a clue, perhaps. Also maybe the reddish hue to the foliage...But who am I kidding, you read the post title so you know it's a blueberry, or Vaccinium reticulatum. In Hawaii the plant is commonly called the 'ohelo. There are two species of Vaccinium in Hawaii, and both have some subspecies, too, varying slightly among the different Hawaiian islands. V. reticulatum is found in open woodlands and high elevations, while V. calycinum is found in wet, wooded areas.

The plant's berries, like our more local V. corymbosum, V. caesariense, or V. angustifolium, make wonderful jams or jellies or can be eaten fresh. They can be picked by visitors and locals but the maximum takeaway is 1 quart when picking in parkland. That's because the plant provides habitat and food to two endemic moths as well as the endangered nene, or Hawaiian goose.

Wednesday, June 23, 2010

Cibotium glaucum

On Monday I mentioned the tree ferns that populate the forests near the active volcano at Volcanoes National Park. Today, we'll take a closer look at the Hawaiian tree fern, or Cibotium glaucum, or hapu'u.

As you can see from the photo above, Cibotium can reach heights up to 8 meters. I encountered this forest - the upper canopy consisting of ohi'a and the understory of hapu'u - while walking to the Thurston Lava Tube in the park. The scale of these beautiful plants is awesome, in the truest sense of the word.

The fronds have a pure, clear green color, with small leaflets. The plant can be propagated by spores - the ones on the youngest fronds are usually most fertile.

The fiddleheads are actually the size of real fiddle or violin heads. Much like other ferns, frying or boiling the heads is part of the local cuisine.

The plants' trunk can be edible as well, but is not very tasty. I read on one site that the trunk is considered "famine food."

In addition to the edible parts of the plant, the shaggy base of the trunk - or the pulu - has been used as a soft filling for pillows and mattresses. This use reached a peak in the mid 19th century and large swaths of tree fern forests were almost irreparably degraded. Much like I mentioned Monday in regards to Metrosideros, these forests are now more carefully managed.

Monday, June 21, 2010

Metrosideros polymorpha (and Volcanoes!)

Well, I got back from Hawaii on Saturday and am now squarely within my last days as a full time New Yorker. I'll most likely work Monday - Wednesday for the next three weeks then finish up at my job (save a few hourly tasks to wrap up my Hawaii project).

Hawaii was wonderful, and thank goodness I scheduled three days on the Big Island. Otherwise, I'm afraid I would have spent far too much time "on call" for work, even if I officially had the day off. I highly HIGHLY (HIGHLY!) recommend the Big Island to any Hawaii-bound individual that is even a casual naturalist. The variety of ecosystems and the rugged beauty of this - the youngest of the Hawaiian islands - place is stunning.

I flew into Kona last Monday morning and immediately set off for Volcanoes National Park. "Why, it's only 90 miles!" I thought to myself, "I'll be there well within 2 hours."

Not so much. The winding roads through the big island - and their ever-changing elevations - definitely slows down the works and driving 90 miles really requires at least 2.5 hours of driving. Of course, as soon as I got to Volcanoes National Park and saw the Kīlauea Crater spewing sulfurous fumes, all that driving was worth it.

Large parts of the park were closed on my recent visit, since the volcano has been acting a bit differently lately. A few weeks ago it began spewing lava in a new location and as a result, the gases have been considered too dangerous to inhale in certain areas. If I had stayed 'til dark, I would have been able to see the red glow of lava further along the edges of the park (at the crater itself it primarily flows underground), but I wasn't up for a long, winding drive at night.

Now then. Let's get to the plants. It's pretty amazing to see a shrub with such a lovely flower on it blooming with an active volcano so nearby. This plant is Metrosideros polymorpha or ōhiʻa lehua. If it looks familiar, you could (maybe, possibly) remember a post I wrote that had some shots of Callistemon citrinus. These plants are both in the Myrtaceae or myrtle family and their flowers (with diminutive petals and brightly-colored, showy stamens) are quite similar.

This species of Metrosideros is endemic to Hawaii, meaning that it can only be found in the Hawaiian islands. Though it does have relatives in New Zealand that are quite similar. The species itself is highly variable and over the years varieties of Metrosideros polymorpha have been further categorized into new species, all equally endemic to Hawaii. Some of the variations we find among the Hawaiian species include the hairiness of the leaves (hairier in drier climates, as the hairs trap ambient moisture) and the color of the leaves (changing from green to greenish-gray to gray).

The species itself is highly adaptable. It can maintain itself as a small shrub or tower to 20+ meters. The incredibly light seeds can blow for miles in the wind and this is partly why the plant is often the first colonizer of post-volcanic, lava-laden landscapes. As it colonizes a lava field, it begins to degrade the rock into soil and provides perching locations for birds. Ultimately, the landscape succeeds into a fern forest, as can be found just a mile away from the Kīlauea crater itself (more on the ferns this week).

I was all too excited to pick up a book at the Volcanoes National Park visitor's center - Hawaii's Plants and Animals: Biological Sketches of Hawaii Volcanoes National Park - and it's a terrific read so far. When I was reading about Metrosideros the authors noted a curious phenomena with this plant: at times, massive swaths of ōhiʻa will die out. When biologists at the park first documented this, they immediately investigated whether a foreign pest or disease was the cause of such dieback, but no culprit was found. Instead, they can only determine that a heavy rain or drought can trigger this mass death. It seems to be part of the evolutionary hardwiring of the plant. Today that is problematic because, given the pervasiveness of the alien plant Pennisetum, the former ōhiʻa forests can be quickly invaded by this weed and prohibit young ōhiʻa to take root. Forecasting ōhiʻa dieback and managing the re-population of young ōhiʻa is a chief concern for land managers on the big island today.

Monday, June 7, 2010

Aloha from the Honolulu Zoo

I spent the afternoon yesterday strolling around the Honolulu Zoo. To be honest, my nostalgic parents had me on a mission. In 1981, we were in Honolulu for a few day during our move to Kuala Lumpur. We went to the zoo and my folks took a snapshot of my brother and me. They understandably want the same shot, 29 years later. How could I turn them down? Perhaps if they scan the old one and send it to me, I can put a "before and after" up, for kicks.

The Honolulu Zoo is a modest one, small, probably around 50 acres I would guess. The signage is some locations is quite old and of course, their fake rock concrete walls are distant ancestors to some of the fancier work you can see these days, like at my old workplace, the Bronx Zoo.

But none of that matters much if the animals are engaged, physically and mentally. And that seems to be the case for most of the tenants here.

Their African Savannah walk is small but the moats are laid out sensibly and you get pretty intimate views of the animals. It was the closest I'd been to these animals (except for one behind the scenes experience at the Bronx Zoo with a giraffe - the feeder let me pet her nose!).

I'd also say the keepers have a good sense of humor. Apparently they have rhinos that could be mating. Rather than close the exhibit so that the rhinos' "rough behavior" would be behind closed doors, they simply informed the public about what they could possibly see.

And this sweet sign must have been in response to concerned questions from visitors. It still tickles me they named him Bobbles. Unfortunately I didn't spot Bobbles yesterday.

Wednesday, June 2, 2010

Kalmia latifolia

As I mentioned earlier this week, I've been doing a lot of traveling lately. Last Tuesday I went to Ocean City, New Jersey to meet with the town's Environmental Commission to talk about native plants. Two weekends before, I was helping my mom out with some spring cleaning. When I was on the bus going home after that weekend, I noticed tiny hints of pink in the woods next to the Garden State Parkway. I knew immediately that they were Kalmia latifolia or Mountain Laurel.

People who have tried to get this plant to thrive in their garden probably look at this shot of Kalmia, growing beautifully on the side of the Garden State Parkway, and grit their teeth. The plant is notoriously difficult. As the common name implies, the plant does best in well drained soil (like, on the sides of mountains, or here, in extremely sandy soil). I see it in South Jersey a lot and of course, it's ubiquitous in the Appalachian.

Kalmia is in the Ericaceae or blueberry family. The foliage and its need for acidic soil is similar to another Ericaceous plant, the Rhododendron. But the flowers are quite unique. I love the flower buds before they open - they look almost like the hard candy cake decorations you can buy at the grocery store.

The plant is called Kalmia after Pehr Kalm who sent samples of the plant to Linnaeus. Latifolia means wide leaves.

This is a very, very pale pink plant, but you can find deeper pinks, like the color of ballet shoes. In either case, they are lovely.

I'm sending this out from Hawaii, so, Aloha! I'll be tweeting pictures occasionally, but won't be blogging much.

Tuesday, June 1, 2010

Mystery Geranium??

Goodness. Things here have been busy. I am (most likely) going back to Hawaii this Thursday. ...The construction schedule on that job isn't a moving deadline so much as a sprinting deadline. Every day is different story/crisis/strategy. I'll be in Hawaii for a week for work and then, hopefully, another whole week for vacation. I'm hoping to spend some time on the Big Island, to visit Volcanoes National Park, Mauna Kea and Rainbow Falls. If you have any recommendations for hotels (particularly in the Hilo area) please let me know!

In addition to an upcoming trip, I have an upcoming move and have been consistently setting up appointments with clients in the DC area. I've spent so much time on a bus between NY, NJ, DC and Philly lately, I'm beginning to feel like Ratso Rizzo (though hopefully sans the untimely end).

To wit: I've been neglecting this blog a bit and haven't been snapping many photos. It's gotten so bad that I had to consult the archives and find a photo from this time last year.

Which brings me to the Geranium species we have here, growing in the Liz Christy Garden. At first, I cavalierly applied the species name maculatum to this plant, but then wondered, could it be G. sanguineum instead? Or maybe it's G. macrorrhizum, the bigroot geranium (presumably the roots are big because it has a particularly good symbiotic relationship with mvcorrhiza the nitrogen-fixing fungus beneficial to so many plants). Suffice to say, I am stumped. Wikipedia states that there are over 400 species of this genus and I just don't feel equipped to hazard a guess. For all I know it could be cultivated so aggressively that it's no longer applied to any species (see Geranium 'Rozanne'). If you have a guess or you outright know what this plant is, please do share with us!

Now then, a bit about the genus itself. The common name for Geranium is cransebill. That's because when the flower goes to seed, it forms a tall column of seeds that will spring open when they are ready to be spread. The column itself looks like the bill of a crane. This also accounts for the plant's scientific name - geranos is an ancient Greek word for 'crane'. The perennials are generally hardy and bloom this time of year in shades of pink, blue and white. I love the foliage which has a sharp aroma when crushed.

You could be wondering, but this plant doesn't look like the annual geraniums I buy...! That's because the geraniums sold as annual plants are technically Pelargonium. They used to be classified as the same genus but have since been separated into its own genus.

Wednesday, May 26, 2010

Green Hawthorn

I was in my old neighborhood in the Lower East Side yesterday and saw a row of trees from across the street. I thought they may have been hawthorns, though was doubtful. It would seem like they would have been long past blooming this late in the spring. But sure enough, I found the entire block of Stanton Street was planted with Crataegus viridis or green hawthorn.

As you can see from the photo below, the bloom has dulled a bit and I'm sure these specimens looked much better a week ago. But I've wanted to blog about this plant for so long and have yet to get around to it so I'm not going to wait a whole other year!

Crataegus viridis is a small ornamental flowering tree with corymbs of white flowers in mid spring. The flowers are not as showy or colorful as a Malus or Prunus but they are quite lovely. And hawthorns have several other advantages to offer. Namely, depending on the cultivar, the plant is laden with showy, persistent berries in the fall and winter. 'Winter King' has long been a favorite due to it's gorgeous fruit set each year.

New leaves are quite different in shape
than the more mature ones.

Another advantage is this plant's status as a native to the southeastern US. Perhaps related to this, the plant is very tough and is not prone to the many diseases that haunt crabapples.

The bark is somewhat fibrous looking,
with longer vertical splits.

Finally, hawthorns provide habitat to many local wildlife species. The berries provide food for birds and the plant itself is a great supporter of butterflies. In fact, wikipedia has a great list of butterfly and moth species that find sustenance from this tree. However, one species that does not like the hawthorn is deer. Which is another terrific advantage. For the most part, deer avoid foraging on this tree, unless they are really, really hungry.

This could have something to do with the large thorns on the tree as well. The one above is a new thorn, but as they age, they harden into sharp, woody needles. I was on a job site at the zoo once and (not prepared, and wearing the wrong type of shoe) a needle went clear through the sole of my shoe and into my heel. It hurt. A lot.

Hawthorns are named as such because one definition of "haw" is "fruit". It can also mean hedge and in England Crataegus monogyna is often used as a hedge. Crataegus itself is derivative of the Greek work 'kratos' which means 'strength'. The origin refers to the hardness of hawthorn wood.

Monday, May 24, 2010

Rosa rugosa

A couple weeks ago I visited my folks at their place on the Jersey shore and was thrilled to see that the rugosa roses (Rosa rugosa) we planted last year are thriving. I can't say I was particularly worried about their survival -- rugosa roses are practically bulletproof, so long as they are planted someplace dry and sunny. Indeed, like the heroine in any bad chick-flick (I'm looking at you, Katherine Heigl), rugosa roses thrive on neglect.

The flower above is from one of the shrubs we planted at my folks' place. I prefer the single-flowering varieties, because I like seeing the very showy stamens. However the multi-flowering varieties are beautiful, too. The samples above and below are both hot pink, though you can find Rosa rugosa in red and white, as well.

Below is the same multi-flowering specimen, rambling along some beach fencing, not far from the spot where I posted some photos of Virginia Creeper a few autumns ago. As you can see, it's spreading prodigiously and since this shot is taken a few hundred yards away from the coastline you can surmise the plant can grow in 100% sand. In fact, it's often employed for dune restoration.

I love the thick, fleshy foliage of Rosa rugosa and the hips are quite showy as well. I've been told they can be used to make a wonderful tea.

Last summer, my parents needed a plant to use in the corner of their property, which is also at the intersection of two streets. I insisted they plant this. It's not native, but it does have a cultural relevance to beach locations since it's ubiquitous in such areas. Rugosa rose was introduced to North America in the mid-18th Century and so far, the plant has not proven to be invasive. I've even seen this species appear on lists of acceptable dune restoration plants in townships that are strict about using native or ecologically-responsible species.

Of course, the plant is thorny as all-get-out. Which makes for a tricky installation, but does keep people from cutting across the corner of our yard. I wrapped the shrubs gently in old beach towels to place them and of course used heavy duty gloves. I am happy to say I walked away unscathed after planting them.

We only put three roses in an area that is probably about 200 square feet. It looked a bit spare last summer and I had to fight off my parents' urges to plant some perennials in the bare spots. But this year, the plant has already begun to sucker, and by next summer the area should be filled out. Just like that heroine in the bad chick flick, patience is a virtue.

Tuesday, May 18, 2010

Monkey Pod Tree

I mentioned Albizia saman in last week's post about Asplenium and then promised to comment more on this lovely tree in the future. Well, that time is now.

First of all, what a beauty, eh? I am *in love* with the elegant, almost overreaching canopy. The form is so striking and, as common as this tree is in Oahu, I think I will always equate monkey pod tree with my wanderings on this trip.

Not that Albizia saman is native to the Hawaiian islands, it's instead native to Central and South America, distributed between Mexico and Brazil. Indeed, due to the region's geologic history, Hawaii is fairly sparse in terms of native plants. More often that not, the plants that are most popular here are native to other areas and were planted by colonists or passers-through. (Somewhat relevant to this information, in last week's post about breadfruit my friend Matthew asked if Artocarpus was endemic to Hawaii and it's not. It's native to the Malay peninsula and the surrounding islands.)

Here above is another shot of the tree pictured at the top of this post. You can gauge from the Monstera leaves below how big this trunk is. I'd say its diameter was probably around 9-10'. A woman at the Waimea Botanical Garden says the arborists speculate this specimen is over 200 years old. In that case it is quite like the "Samán de Güere" a Venezuelan national treasure and landmark. That specimen was originally recorded by Alexander von Humboldt, a German naturalist and one of the founders of biogeography, in his trip to South America between 1799 and 1804. You can see an old print of this Venezuelan icon here. Unfortunately, there's scant information about this tree online, in English (and my Spanish is pretty shoddy these days).

I know I'm quite smitten with a new species when I have a ton of photos of the feature I like so much (in this case, the branching habit) and one cursory shot of another key characteristic (in this case, the leaves). In fact, I was relieved to find I had even one picture of the species' pinnately compound leaves. Knowing that the leaves are pinnately compound, you could hazard a guess that Albizia is a member of the pea or legume family, and you'd be right. Technically these days, you'd say it is a member of the Fabaceae family, though Leguminosae is still commonly used and considered acceptable. In either case, Fabaceae trees have similar leaves and pea-pod like fruits. Other species of this family which we have previously discussed are Gleditsia, Robinia, Sophora, Lupinus, Cercis and Cladrastis.

Finally, on a very unscientific note, every time I look at this photo, I can hear Meryl Streep saying in her Danish accent "I had a farm in Africa." Indeed, monkey pod tree is related to Albizia amara, a tree that is found in the dry scrublands between Sudan and South Africa.