Epidendrum acutilobum Hagsater & Uribe Velez 2021 GROUP Amphyglottis SUBGROUP Glossaspis

TYPE LCDP Photo by © Carlos Uribe & Cisneros and Icones Orchidacearum 18(2) Plate 1849 Hagsater & Jimenez 2021 and the AMO Herbaria Website

Common Name The Acute Lobe Epidendrum

Flower Size 1.2" [3 cm]

Found in Santander, Huila and Caqueta departments of Colombia on the Cordillera Oriental of Colombia at elevations of 1300 to 2800 meters as a large sized, cool to cold growing epiphyte with simple, cane-like, slightly sinuous, terete, and slightly compressed towards the apex, thin, basal half covered by non-foliar sheaths, erect stems carrying 8 to 13, distichous, articulate, along the apical half of the stem, elliptic-oblong, rounded to unequally bilobed apically, coriaceous, smnooth, medium green, margins entire leaves that blooms in the fall and winter on an erect, without a spathe, peduncle, 12 to 18.4" [30 to 46 cm] long, elongate, straight, provided with 6 to 8, yellow with brown dots, scarious, striated, papyraceous, imbricate, acuminate bracts, rachis 2.8 to 4" [7 to 10 cm] long, racemose to pluriracemose, new racemes produced from the upper nodes of the peduncle, cylindrical to sub-spherical, successively, eventually all open at once, to 25 flowered inflorescence with tringular, acuminate, embracing, decreasing in length, much shorter than the ovary floral bracts and carrying non resupinate flowers.

"Epidendrum acutilobum belongs to the GROUP Secundum SUBGROUP Elongatum, which is recognized by the caespitose habit, simple stems, leaves oblong-lanceolate, coriaceous, the bilobed and elongate peduncle of the erect, racemose inflorescence, the flowers non-resupinate, and the callus massive and complex. The new species is recognized by non-resupinate flowers, the pale pink-red flowers, with a large white callus on the lip, sepals .576" [14.4 mm] long, oblanceolate, petals .68" [15.2 mm] long, elliptic-oblanceolate; the massive callus prominent, formed by a massive truncate plate ending in 3 acute tubercules, with a pair of thick elliptic tubercules on top of the plate at the sides of the base that divergently terminate in acute points, the small lateral lobes of the lip, obliquely semi-flabellate, and the mid lobe of the lip triangular acute, margins entire. It is similar to Epidendrum vinosum Schltr., but that species has fuchsia to pale wine-red colored flowers, the callus white, sepals and petals more oblong, about .8" [20 mm] long, and wider near the obtuse apex, and the midlobe of the lip oblong, apically obtuse, and the callus about as wide as the mid-lobe, sub-quadrate, apiculate, with a rounded tubercule on each side. Epidendrum villahermosaense Sierra-Ariza & Hágsater has pink-crimson flowers with a large wide, truncate callus, the sepals .68 to .76" [17-19 mm] long, the lateral sepals oblong, apex obliquely acute, and the retrorse lateral lobes of the lip deeply lacerate, spreading with the lateral margins entire and strongly revolute, the mid-lobe “Y” shaped, narrow at the base, and spreading towards the apex, with the lateral margins strongly revolute." Hagsater etal 2021


References W3 Tropicos, Kew Monocot list , IPNI ; * Icones Orchidacearum 18(2) Plate 1849 Hagsater & Jimenez 2021 drawing/photo fide; Icones Orchidacearum 18(2) Plate 1855 Hagsater & Jimenez 2021 see recognition section; Icones Orchidacearum 18(2) Plate 1871 Hagsater & Jimenez 2021 see recognition section; Icones Orchidacearum 18(2) Plate 1897 Hagsater & Jimenez 2021 see recognition section; Icones Orchidacearum 18(2) Plate 1898 Hagsater & Jimenez 2021 see recognition section