Phragmipedium klotzscheanum (Rchb. f.)Rolfe
in The Orchid Review 4: 332, 1896.
Cypripedium klotzscheanum Rchb. f. in Schomburgk, Versuch einer Flora und Fauna von Guayana, p. 1969, 1848, and in Die Orchideen in Linnaea Vol. 22: 811, 1849.
Cypripedium schomburgkianum Klotzsch fide Schomburgk in Botanical Reminiscence of British Guaiana, 59, 1876.
Paphiopedilum klotzscheanum Pfitzer in Engler's Botanische Jahrbücher, Vol. XIX, 41, 1894.
Paphiopedilum klotzscheanum Kerchove in Orchid, 454, 1894.
Phragmopedilum klotzscheanum (Rchb. f.)Pfitzer in Engler, Das Pflanzenreich IV. 50, Heft 12: 47, 1903.
Selenipedium klotzscheanum Rchb. f. in Xenia Orch., Vol. 1, 3, 1854.
Selenipedium schomburgkianum Desbois in Cyprip., 532, 1898.
Plant : About 4 leaves.
Leaves : Slender, sedge-likes leaves.
Inflorescence : The stalk of the inflorescence is covered with downy hairs. The flowers open one after another.
Flower : The petals have no hairs. The ovary is pubescent.
Habitat : According to Dunsterville and other authors, these plants grow at least partly, completely standing in water.
Distribution : Guyana and Venezuela.
Flowering season :
History : Richard Schomburgk found this species in 1847 at the Rue river in British Guyana. H.G. Reichenbach described this species in 1847 based on the herbarium material. Later in 1855 more plants of this species were found by Thurn in the Roraima Mountains at the border of Venezuela and Guyana. It wasn't until 1886 before the first plant of this species was imported into Europe by Sander.
Comments : In a personal communication Roberto Takase reports the following facts:
Plants that grow in shady conditions grow larger and tend to have longer leaves. The flowering of those plants is quite sparse, with only 2 or 3 flowers per inflorescence. The colour of the flowers is also much greener than that of the plants that grow in sun exposed positions.
It seems that seed capsules are only formed on the plants that grow in brighter conditions.
The to bright light exposed plants when in bud seem to be very susceptible to attacks by insects (Curcolionideos), which eat the flower buds.
An other interesting fact is that it looks like this species main way of dispersal is not by seeds, but by parts of the rhizomes. Since the plants almost always grow in the water at the edges of streams, the floods which develop during the rain season tend to break off parts of the rhizomes and take them downstream. In places where the current is less strong these rhizome parts get washed on the banks, where they establish themselves to form new clumps.
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