Showing posts with label conservation. Show all posts
Showing posts with label conservation. Show all posts

Saturday, January 29, 2011

Epidendrum boricuarum a native orchid species described in 1993.

Some of the flowers have a slight whitish tint that appears more pronounced under flash photography


A recently fallen branch with a clump of orchids, note that there are the dried stems of several dead clumps around the living plant.
There is a developing seed pod in the right lower corner of the photo

A large healthy clump flowering profusely, this one is growing in the sierra palm forest

This plant is growing in the lower part of the elfin forest


This orchid native in PR was described in the year 1993.  Before that year it was commonly known as Epidendrum difforme.  But research on the identity of the original species revealed that there were dozens of green flowered Epidendrum species that were classified as difforme because the flowers and the plant body were similar.  One of the species that was revealed as a distinct entity was Epi. boricuarum, the name alludes to the name that is applied to the people of Puerto Rico.  This orchid has been found in the islands of Hispaniola, Puerto Rico and Guadaloupe.
In Puerto Rico this species is widespread and at times quite common in areas of favorable habitat.  I have found it growing in various settings from the trunks of palms, branches and rotten tree stumps.  It seems to favor the edge of the forest where light penetrates considerably deeper into the forest than in areas of continuous canopy.  But perhaps this is just a byproduct of the places where I find easier to move through the forest.
The canes of the plants are about ten to twelve inches tall and often form clusters of growths.  The plants tend to open all its flowers at the same time.  The flowers are green, they are said to become fragrant at night and to produce a fragrance reminiscent of cucumbers.  In the wild it is common to find plants that have fallen to the ground when the branch they were growing on died and decayed.  If the branch falls in a reasonably sunny, well drained area the orchids will survive (at least until the branch decays completely), if they fall in a shady wet spot they die.
From time to time you see plants of this species in captivity but healthy well grown plants are a rarity.  I asked a few orchidist about the culture of this species and they remarked that it usually dies in captivity.  I have seen impressive specimen plants of this species on shows but I suspect the reason is that some people grow this plant in areas where it is native and therefore in its optimum environmental conditions.
Although this plant has obvious horticultural merit it is rarely seen mainly because local orchid grower tastes tend to run toward hybrids which are inexpensive, easy to find and spectacularly colored.  Green flowered orchids are not popular locally.  I recall that a local orchid hybridizer from Utuado, Mr. Eli Santiago did some hybridizing with this species, but I have not seen the hybrids in orchid shows.
Since there seems to have been some importations into Puerto Rico of other species under the “Epi difforme” label there may be some confusion as to the appearance of the flowers of boricuarum when seen in orchid shows.  Since these flowers were photographed from plants in situ, there is little doubt as to their identity.

Friday, October 31, 2008

Arachnis culture



Arachnis Maggie Oei 'Red Ribbon', a hybrid



Arachnis flos-aeris var. insignis, the storied "Black Orchid" is, in truth, deep red

Arachnis Maggie Oei 'Yellow Ribbon" An extremely hardy and common plant in PR



A Vandachnis Coronation is a hybrid of Vandopsis lissochiloides x Arachnis Maggie Oei. It is a slow growing, large sized plant that blooms once a week and produces long lasting leathery flowers that favor the Arachnis parent.

Because of their ecology Arachnis plants can be difficult to culture and bloom if certain things are not done.
1. An Arachnis plant needs a good root system to grow and bloom well and to survive the effects of full sunlight. A young plant with few roots that is grown exposed to full sunlight will grow very slowly and if it blooms it will bloom weakly. So you need to keep the base in the shade in a pot filled with bark and leafmold. A touch of cattle manure can do wonders.
2. You have to replicate the plant's journey to the canopy, this is done by tying the plant to a suitably sturdy post, this should be positioned so that the plant eventually reaches a spot where it is receiving full sun during most of the day.
3. When the plant has reached a height that has the tip of the stem receiving full sun and has started blooming, allow it to grow about two feet more and then bend (but not break) the stalk to the side. The bent stalk will mimic what happens to plants that protrude too much from the canopy. The bent tip will continue growing and blooming albeit not as vigorously as before. But after the tip of the stalk is bent you will notice a new stem growing just under the spot where you bent the stem. Continue bending down new stems and cutting the tips that are blooming too poorly. Plant them near the base of the first plant.
4. Continue planting stems and enjoying the results, give stem props to neighbors so that they can plant their own plants.
5. Enjoy the ever enlarging mass of Arachnis that is decorating your house and your neighbors house.
6. Start getting nervous and paranoid about the sheer mass of orchids that is now growing all around your county. You know they are talking about you.
7. Grab a machete and your loved ones and hack your way out to freedom away from the encroaching ever growing orchids.
8. Flee the country.
9. In your new residence buy an innocuous looking "fast growing"orchid.

Bletia patula a pale color form



This flowers show a typical coloration,
they were growing a few feet from the pale colored flower.

A very pale flower of Bletia patula

Every so often I grab my backpack and hike into the island forests looking for orchids. I was lucky enough to secure the company of a friend who is just giving up smoking and was quite desperate for anything that would keep his mind off smoking and him away from other smokers. After a few hours of hiking we came upon a huge area where, for some reason, the all vegetation was killed some years ago by the government. Plants have been slow to colonize this patch but you could see here and there small Bletia patula plants growing inter sped with a host of pioneer plant species, mostly grasses. Unfortunately there was only a single B. patula plant in bloom that I could see in the whole area. When I was photographing the plant my friend calling at me from some distance away telling about a plant that might be an orchid. Looking at the plant from a distance I assumed that probably it was the white form of Spathoglottis plicata, which can be found by the thousands in some valleys in the central mountains. But I decided to take a look just in case. When I got near the plant i realized that it could be a Spathoglottis, it had the wrong shape and the inflorescence was too short. Initially I was quite excited at the prospect of having found an alba form of Bletia patula, however the buds were light pink even if the flower was almost white. I have seen groups many thousands of plants of B. patula in many places in the northwestern part of the island and I have never seen a white form. I might be wrong but as far as I know only one alba form of this species has ever been found. This plant is not an alba, but what it could be called, a near alba, semi alba? I am posting a photo here in the hope that someone who knows more about this species might offer some enlightening comment on this plant. By the way I didn't collect this plant, I can't say I wasn't mighty tempted but decided that it will remain in place until I can ascertain if the government plans to eradicate the plants in the area again. In case that the government has plans to keep killing the vegetation in this spot(I think it is done with herbicides) I will move the plant to a secure place inside a state forest where I can keep visiting it. It is possible that I would have missed this plant completely if my friend had not looked at it closely mainly because I would not have associated the light color flowers nodding in the distance with B. patula flowers.

Thursday, October 30, 2008

Psychilis krugii at Guanica State Forest









On February 27, 2006, I went to Guanica State Forest to try to find and photograph some variations of the orchid Psychilis krugi. The area is very dry and hot and during the "wet" season it is also horribly mosquito infested (now is the dry season). I had a hard time finding somebody to accompany me. I asked a female friend if she could go with me. I told her that there would be poisonous plants, the odd loathsome insect and fearsomely prickly cactus. She said that she would go since it would be a refreshing change from having to deal with her ex-husband.I went to an area that is rarely visited as the most well traveled areas have been nearly stripped of orchids.We had to hike for a while but when we arrived we found hundreds of plants but very, very few flowers. In fact we saw only three flowers. However the plants had many inflorescenses and probably in a month or two there will be a huge number of flowers.

Vanda tricolor var. suavis, seed pod releasing seed to the wind




I don't recall ever seeing anywhere a picture of the orchid seed being released from a seed capsule. So I decided to photograph the newly opened capsule of a Vanda tricolor var. suavis that is near my shade house and to share the pictures with all of you that might want to see it. This seed capsule reached maturity after about a year of the flower being pollinated. It was naturally pollinated by a local species of solitary bee. The first time I moved the capsule an impressively dense red cloud of seed was released. Unfortunately I was not able to photograph this event. The photograph shows the second event of seed dispersal. I moved the capsule from side to side to stimulate the release of the seed. You can see as the light weight seed floats in the air as a cloud of reddish points. Every surface in the near proximity of the Vanda was sprinkled with some seed but the Phaius plants growing near had their leaves covered with a particularly generous dusting of seeds. It is uncertain if any seed will survive as we are in the peak of the dry season. But just in case I will be on the lookout for any seedling that might develop in near by in any orchid pot, you never know!

Habenaria monorrhiza, a native orchid of Puerto Rico





Habitat

I took a longer than usual vacation this December and used the extra time to drive around and photograph orchids. One of the plants I found was Habenaria monorrhiza.Unlike most orchids this plant can be found growing in roadside ditches. I only found it at the higher elevation roadsides, in areas over 2500 feet in altitude. Supposedly it can grow at lower altitudes but I have never seen it in the lowlands. The plants I saw were small and few flowered. It is possible that I missed most plants in the population due to the tangle of growths in the roadsides at higher elevations. The orchids were not particularly hard to see but the many types of plants growing in the roadside plus the fact that there was a white flowered weed species flowering at the time, made spotting this plant somewhat difficult. This plant was seen near Orocovis, close to the geographical center of the island. I have never seen this plant in cultivation or in exhibition anywhere in the island so I suspect that it either dies in cultivation, local growers find it too plain to spend any time and effort growing it or most likely it is not recognized as being an orchid. This orchid should be enjoyed in its habitat and not collected.

Temperature: Possibly middle eighties during the day, down into the sixties or lower at night.

Substrate: It appeared to be dense waterlogged clay soil.

Lightning: Half the day full sunlight, the rest bright shadow.

Watering: Very wet, almost daily rain, lots of fog and drizzle.

Humidity: 100% at night, probably in the nineties during the day.Blooming: In autumn and winter (Ackermann, J. D., Orchids of PR and The Virgin Islands) apparently a few plant can be found in bloom at any time in the year.

Maxillaria coccinea, in Puerto Rico's cloud forest





Maxillaria coccinea flowering in the Puertorican cloud forest




Many seedpods can be seen developing on the different inflorescences




Under the mother plant there are many seedlings growing between mosses
on the bare rock face.

A visit to Max. coccinea habitat

On April 7, 2007 I was in the Rio Grande area in some official business and sacrificed I my lunch hour to make a side trip to the Caribbean National Forest. I wanted to take a look at some orchids whose growth and development I have been observing for several years. The weather was rainy with spells of hard rain and fog interrupted by moments of strong sunlight and then back to rain again. The particular plants I wanted to see are easily reached but I had a hard time photographing them because of the rain. I also had to take in account the fact that the area where they grow was filled by an invasion, one could almost dare say an infestation, of tourists. I waited for moments when there were no tourists nearby to avoid drawing attention to the plants. I noticed to my dismay that some had disappeared. A large, almost four feet tall plant of Epidendrum longicarpum was gone, also missing were several good sized plants of Epidendrum borincanum. However the most surprising thing was that only very few plants of Lepanthes woodburyana could be located and the disappearance of Lepanthes sanguinea. These plants were abundant in the area and it used to be that with even with the slightest effort you could locate several plants of L. woodburyana a one or two of L. sanguinea. I have no idea why there were not there, it is extremely unlikely they were collected. Most of the other small flowered orchids were present in good numbers. Maxillaria coccinea is locally common and in favorable habitat is one of the plants most often found in fallen logs and branches. The goal of my visit was to photograph a plant in full bloom. It appears that I arrived slightly late in the season as I found a large number of pollinated flowers.The weather in the area where these M. coccinea thrive is very wet and every surface is covered with plant life of some sort. I know several people that have tried to cultivate the Puerto Rican Maxillaria coccinea, all have failed even though some have used quite ingenious methods to keep the plants in a level of humidity that would be conductive to their survival. It is unclear exactly why plants eventually deteriorate and die but the best guess I can make is that the plants needs a combination of very high humidity, mild temperatures and substrate that are almost impossible to replicate in the hot tropical lowlands without some sort of artificial means. These plants are found at an altitude of 3500 feet in an area that is a National Park and therefore they are safe from the typical threats of habitat destruction and over collection. The area where they grow is visited daily by hundreds, sometimes thousands of tourists but they are usually respectful of the rules and their impact in the area appears to be little. The plants are safe mainly due to the fact that the terrain is so treacherously slippery that most visitors are justly afraid of leaving the trails and having a deadly fall. This is not an idle consideration, in the past imprudent visitors have come to grisly ends by unwisely venturing into the slippery forest floor away from the trails.The plants are growing in an area that is protected from the sun most of the day but that does get full sun for a few hours in the afternoon. There are plants growing all over the place but there were few growing in exposed situations most are under the cover of bushes. The ones in deep shade are small and few flowered.The area where the plant was found receives constant and precipitation almost year round in the form of rain, drizzle, and fog. The area where these plants grow is dominated by sierra palms inter sped with many other kind of tress. Most of the trees are of small stature due to a combination of soil and climate factors.


Temperature: It can range from the high eighties in the middle of the day in the peak of summer to the middle fifties at night in the peak of winter. When I have visited the forest the temperatures have fluctuated between 65F and 75F.


Substrate: Trees, rotten logs, branches, and rocks.Lightning: Light to heavy shade, best growth and flowering in light shade. Watering: The area gets rain almost daily and the soil is saturated and never dries up.


Humidity: 100% at night and only slightly lower during the day.Blooming: I don’t know the blooming season of this species but in this visit many plants had flowers.


Light: A constantly shifting mixture of full sun and cloud filtered light, the orchids were under medium sized bushes that protected them from full sun but allowed a fair amount of light to stricke the orchids underneath.

Wednesday, October 29, 2008

Puerto Rican parrot, Amazona vittata, a smile of hope



One of the ten most endangered species of parrot in the world, the PR parrot is the focus of an intense effort to restore its populations. A formerly extremely abundant bird whose population was counted in the hundred of thousands if not in millions, it s wild population suffered a catastrophic decline and dwindled to 13 in the 1970's due to habitat loss and other causes. Now there are about 280 individuals and two wild populations, including a new one in the Karst region of Puerto Rico that has about twenty birds. I post this photo to invite you to think of all the species that are in jeopardy due to habitat destruction and unwise resource exploitation. Some of endangered species are superbly adapted to their enviroment but have great trouble dealing with highly unnatural pressures such as being captured for the pet market (one of the reasons for the decline of the PR parrot). I have dedicated my life to save these extraordinary creatures which are profoundly emotive, very independent and a true nightmare to breed in captivity.




There are various posts in this blog about dufferent aspects of the life and biology of Amazona vittata both in captivity and in the wild.


Para informacion en Espanol con respecto a la reproduccion en cautiverio de esta cotorra en el Aviario de Rio Abajo, puede buscar en:bc.inter.edu/focus/a4_n2/valentin_delarosa.pdf