Pleurothallis hartwegiifolia H.Wendl. & Kraenzl 1900 SUBGENUS Acianthera [Scheidw.] Luer 1986

Photo by Rodolfo Solano Gomez

Drawing of Acianthera hartwegiifolia

Drawing of Acianthera hartwegiifolia by Solano & Soto

TYPE Drawing

TYPE Drawing by Rchb.f


Drawing by Carl Luer

Common Name The Like P hartwegii Leaf Pleurothallis

Flower Size

Found in Nayarit, Jalisco, Michoacan, Mexico, Guerrero and probably oaxaca states of Mexico in evergreen cloud forest and mesophytic barranca forests at elevations of 1450 to 2650 meters as a small sized, cool to cold growing, caespitose epiphyte with erect to hanging, trigonal, winged, ramicauls with 2 scarious sheaths and carrying a single, apical, very fleshy, rigid, revolute margins, adaxially reticulate-sulcate, abaxaially suffused with black, elliptic to oblong, obtuse apically and basally, sessile base leaf that blooms in the fall and winter on 1 to 2, arising througha conduplicate, triangular, acute spathe, short, subfasciculate, distichous, 4 to 5 flowered inflorescence with imbricate, obliquely funnel-shaped, subacute, shortly apiculate floral bracts and carrying small, bilabiate, orange flowers.

"Acianthera hartwegiifolia is closely related and it has been confused with P chrysantha. The flowers of both species are almost indistinguishable, but A. hartwegiifolia has orange-colored flowers, recurved dorsal sepal, slender ovary, thinner lip, and less pubescent sepals; vegetatively, A. chrysantha is a much stouter and fleshier plant with thick, winged stems up to .44" [11 mm] wide at apex, and the leaf is more elliptic and often acute." Soto and Solano 2003

"In Guerrero it can be found in the same localities where P chrysantha grows, but in moister habitats." Soto and Solano 2003

CAUTION Often put as a synonym of P chrysantha but Kew has recently separated them.

Synonyms Acianthera hartwegiifolia (H.Wendl. & Kraenzl.) Solano & Soto Arenas 2002 publ. 2003

References W3 Tropicos, Kew Monocot list , IPNI ;

* Xenia Orchid. 3: 165, H.Wendl. & Kraenzl 1900 1900;

* Xenia Orchid. 3: t. 296 H.Wendl. & Kraenzl 1900 1900 drawing fide;

The Orchidaceae of Mexico. Ceiba 2: 95. L.O. Williams 1951;

Flora Novo-Galiciana Vol. 16: f Orchidaceae: 261 , fig. 76 McVaugh, R. 1985;

Icones Orchidacearum 5-6: t. 507 Solano & Soto Arenas 2002 publ. 2003 as Acianthera hartwegiifolia drawing fide;

Orchids of Mexico Hagsater, Soto, Salazar, Jimenez Lopez & Dressler 2005 as Acianthera hartwegifolia photo good