Epidendrum pleurotallipnevma Hágsater, Edquén & E.Santiago 2018 GROUP Ampelospathum

Plant in situ

TYPE Photos by © J. D. Edquén and Icones Orchidacearum 16(2) Plate 1694 Hagsater & Jimenez 2018 and the AMO Herbaria Website

Common Name The Pleurothallis Like Epidendrum

Flower Size 1.1" [2.75 cm]

Found in San Martín province of northern Peru, near the border with Amazonas, at elevations around 1500 meters on Myrtaceae shrub in non-amazonian secondary forest, on a deforested terrace as a small sized, cool growing epiphyte with simple, cane-like, terete at base, laterally compressed towards the apex, unifoliate, sub-erect, straight; nearly totally covered by 2 bracts 2.7-5.0 cm long, non-foliar, tubular, scarious and becoming fibrous with age. carrying a single, apical, erect, articulate, coriaceous, stiff; tubular, laterally compressed, green with base tinged red sheath; blade oblong-elliptic, apically rounded, green, concolor, margin entire, spreading leaves that blooms in the spring and summer on a terminal, arising through 2, tubular, ancipitose, apex obtuse, slightly imbricated spathes, peduncle 2.4" [6 cm] long, laterally compressed, somewhat ancipitose, green, concolor, 6" [15 cm] long, apical, racemose, erect, laxly simultaneously 12 flowered inflorescence with much shorter than the ovary, widely triangular, acute, embracing floral bracts and carrying resupinate, membranous, dark yellow-greenish to pale green flwoers with the fragrance not registered.

"Epidendrum pleurothallipnevma is reminiscent of the GROUP Ampelospathum which is characterized by the simple, cane-like, one to few-leaved stems with tubular, tight bracts at the base of the peduncle of a racemose, simple inflorescence, the flowers resupinate. The species is recognized by the single leafed stem 3.8 to 4" [9.5 to 10 cm] long, with a single apical leaf, .44 x .68" [11 x 1.7 cm], coriaceous, oblong-elliptic, apically rounded, the racemose inflorescence longer than the leaf, subtended by two imbricated bracts, flowers dark yellow-green to pale green, sepals .64 to .6" [14 to 15 mm] long, lip 3-lobed; lateral lobes dolabriform, mid lobe smaller, obtrapezoid, apically bilobulate, forming two rounded lobules. Epidendrum chalmersii has relatively small plants 8 to 12" [20 to 30 cm] tall including the inflorescence, with 3 to 4 elliptic leaves 2 to 3.8 x .88 to 1.12" [5 to 9.5 x 2.2 to 2.8 cm], the 6 to 10 flowered inflorescence, sepals obovate-oblanceolate, .46 to .52" [11.5 to 13 mm] long, and the mid-lobe of the lip truncate and minutely bilobed at the apex. Epidendrum ampliracemum C.Schweinf. has 3 to 4 larger leaves, 2.4 to 5.2 x 1.6" [6 to 13 x 4 cm], a many flowered inflorescence, elongate 7.6" [19 cm] long, lateral sepals oblanceolate .68 to .72" [17 to 18 mm] long, and the mid-lobe the lip cuneate, subobtuse, minutely apiculate." Hagsater etal 2018


References W3 Tropicos, Kew Monocot list , IPNI ; * Icones Orchidacearum 16(2) Plate 1694 Hagsater & Jimenez 2018 drawing/photo fide