Epidendrum sanctae-rosae Hágsater, Sauleda, Uribe Vélez & E.Santiago 2018 GROUP Amblostomioides

TYPE Drawing

TYPE Photo by © Carlos Uribe/TYPE Drawing © by R Jimenez and The AMO Herbario Website

Part shade Cold Spring

Common Name The Santa Rosa Epidendrum [Town near where the type was collected]

Flower Size .4" [1 cm]

Found in Cauca department of Colombia from the upper basin of the Caquetá river, at elevations around 1600 meters as a medum to just large sized, cool growing epiphyte with cane-like, terete at base, laterally compressed towards the apex, slightly thickened in the middle (though without forming an evident fusiform pseudobulb), erect, straight stems, enveloped basally by non-foliar, tubular, scarious sheaths and carrying 8, distributed along the apical half of the stems, articulate, alternate, spreading and somewhat arched, green with the margin tinged with reddish purple, with tubular, minutely striated, tinged with reddish purple basal sheaths; blade oblong-lanceolate, acute, margin entire, spreading leaves that blooms in the fall on a terminal, without a spathe, peduncle ca. .8" [2.0 cm] long, laterally compressed, straight, without bracts; main raceme 11.2" [28 cm] long, with 2 branches 8 to 8.8" [20 to 22 cm] long, nutant, 12.4" [31 cm] long overall, apical, paniculate, flowering only once, nutantthe flowers densely packed throughout the branches, on very short ovaries, simultaneously 45 on the main raceme, 25-39 on the branches, 109 flowered inflorescence with shorter than the ovary, narrowly triangular, acuminate, embracing floral bracts and carrying resupinate, pale green flowers with the sepals, petals and apex of the column tinged rose-purple and the fragrance not registered.

" Epidendrum sanctae-rosae belongs to the GROUP Amblostomioides recognized by the sympodial habit, with somewhat fusiform-thickened stems, sub-coriaceous, bilobed leaves, paniculate inflorescence, and ovary or flowers often pubescent, lip 3-lobed. The species is recognized by the nutant, many-flowered inflorescence, the flowers densely packed throughout the branches, on very short ovaries; the flowers small, sepals .24 x .12" [6 x 3 mm], disc of the lip provided with 3 very short, prominent ribs, reaching the base of the midlobe, united at the base, apically narrowly rounded, the mid-rib straight, the lateral ribs divergent, formed by a simple rib with a wider, sulcate rib on top; lateral lobes .08 X .12" [2 x 3 mm], transversely elliptic; mid-lobe .1 x .1" [2.5 x 2.5 mm], sub-quadrate, corners rounded, apex somewhat emarginate. Epidendrum purum Lindl. has oblong leaves 6.24 to 8.32" x .52" [15.6 to 20.8 x 1.3 cm], an erect inflorescence with larger flowers, sepals .48 to .52" [12 to 13 mm] long, narrowly lanceolate, acuminate, dorsal sepal spreading, petals linear, spreading, and the apex of dolabriform lateral lobes of the lip acute. Epidendrum subpurum Rchb.f. has a racemose inflorescence, laxly few-flowered, sepals .32" [8 mm] long, lateral lobes of the lip ovoid, acute." Hagsater etal 2018


References W3 Tropicos, Kew Monocot list , IPNI ; *Icones Orchidacearum 16[1} Plate 1657 Hagsater & Sanchez 2018 drawing/photo fide;