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Orchid Species: Physosiphon deregularis

Kew currently accepted name is Stelis deregularis

Physosiphon deregularis is an orchid species identified by (Barb.Rodr.) Cogn. in C.F.P.von Martius & auct. suc. (eds.) in 1896. Culture information and photos for this orchid are commonly detailed under the currently accepted name of Stelis deregularis.
Genus
Physosiphon (Psn.)
Grex
deregularis
Parents
Species
Author
(Barb.Rodr.) Cogn. in C.F.P.von Martius & auct. suc. (eds.)
Year
1896
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ORIGIN: Found from Belize, Honduras, Costa Rica, Panama and then Ecuador, Peru and Brazil as a small to medium sized, densly caespitose, hot to warm growing epiphytic herb that occurs in lowland forests at elevations of 100 to 1900 meters.

DESCRIPTION: Found from Belize, Honduras, Costa Rica, Panama and then Ecuador, Peru and Brazil as a small to medium sized, densly caespitose, hot to warm growing epiphytic herb that occurs in lowland forests at elevations of 100 to 1900 meters with clustered ramicauls enveloped basally by 2 to 4 tubular sheaths and carrying a single, apical, coriaceous to subcoriaceous, erect to patent, variable, lanceolate, oblong, elliptic, oblanceolate-ligulate, to ovate, obtuse to rounded apically, from almost sessile to cuneate to longly attenuate and petiolate base leaf that blooms on 1 to several apical, distichous to subsecund, densly and simultaneously many tiny flowered racemes that are much longer than the leaf, that occurs in the summer and fall. This species superficially resembles a Stelis.

-- information provided by Jay Pfahl, author of the Internet Orchid Species Encyclopedia (IOSPE).
Other Names
Genus Name Genus Grex Name Year Author
Add+ Stelis Ste deregularis 1881 Barb.Rodr.
Add+ Pseudostelis Pseudostelis bradei 1922 Schltr.
Add+ Pseudostelis Pseudostelis spiralis 1922 (Lindl.) Schltr.
Add+ Physosiphon Psn minutiflorus 1925 Ames & C.Schweinf.
Add+ Physosiphon Psn spiralis 1835 Lindl.
Add+ Pleurothallis Pths clausa 1880 De Puydt
Add+ Pleurothallis Pths schweinfurthiana 1956 L.O.Williams
Add+ Pseudostelis Pseudostelis deregularis 1922 (Barb.Rodr.) Schltr.
Add+ Pleurothallis Pths deregularis 1978 (Barb.Rodr.) Luer
Add+ Crocodeilanthe Crocodeilanthe spiralis 2018 (Lindl.) Toscano
Most awarded/recent cultivars: Pths. deregularis 'Free Spirit' (2003) Pths. deregularis 'Carol' (1994)
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