Epidendrum xelidorimarachinii Hágsater & E.Santiago 2019 GROUP Arbusculum SUBGROUP Incomptum

TYPE Photo

LCDP TYPE Photo by E. A. Rimarachin & A. Cisneros/TYPE Photo by E. A. Rimarachin and The AMO Herbario Website


Common Name The Swallow-Tail Lip E rimarachinii Epidendrum [refers its swallow tail shaped lip and Mr Rimarachin who discovered it]

Flower Size 1.2" [3 cm]

Found in Cajamarca department of Peru, just south of the border with Ecuador, at elevations around 1670 meters as a small sized, cool growing epiphyte with erect, simple, cane-like, thin, terete, stems straight, progressively shorter stems, covered by several non-foliar sheaths and carrying 3 to 6, distributed along the apical half of the stems, alternate, somewhat conduplicate at the base; blade sub-equal, lanceolate, acute, green, concolor leaves. that blooms in the late fall on a terminal, without a spathe, peduncle .52 to .96" [1.3 to 2.4 cm] long, slightly laterally compressed, not ancipitose; rachis 1.08 to 3.2" [2.7 to 8.0 cm] long, 1.4 to 3.48" [3.5 to 8.7 cm] long overall, racemose, arching, nutant successively few, eventually all open at once, 5 to 7 flowered inflorescence with much shorter than the ovary, triangular, acute, embracing floral bracts and carrying resupinate flowers with the sepals and petals green, lip brown, calli green to yellow and the fragrance not registered.

"Epidendrum xelidorimarachinii belongs to the GROUP Arbusculum SUBGROUP Incomptum which is characterized by the erect habit with successive lateral growths produced from the middle of the previous growth, few leaves aggregate towards the apex of the stems, roots produced generally only from the base of the primordial stem, inflorescences are short with fleshy yellowish to green to violet-green to black flowers with short ovaries, the lip entire to 3-lobed. The species is recognized by the acute sepals, lateral sepals elliptic, dorsal elliptic-lanceolate, petals oblanceolate, 3-veined, lip 3-lobed, slightly convex, margins entire, spreading; lateral lobes .36 to .4" x .34" [9 to 10 x 8.5 mm], semi-obovate, base widely cordate, posterior side semi-obovate, front margin straight; mid-lobe .16 x .32" [4 x 8 mm], deeply bifurcate, formed by a pair of triangular divergent lobes forming a nearly 90° angle, each triangle .16 x .1" [4.0 x 2.5 mm], apex narrowly rounded. Epidendrum incomptum has a dense inflorescence with up to 20 flowers; lip 3-lobed, ecallose, divaricate lateral lobes with the forward edge usually straight and a sub-quadrate, minutely apiculate mid-lobe. Epidendrum rimarachinii Hágsater has a similar appearance but has a completely different lip, .52 to .6" x .88 to .92" [13 to 15 x 22 to 23 mm], 3-lobed, obreniform in general outline, lateral margins strongly revolute in natural position, base cordate, apex strongly emarginate, bicallose; lateral lobes .26 x .66" [9 x 16.5 mm], transversely obovate, wider towards the apex; mid-lobe .1 x .26" [2.5 x 6.5 mm], formed by two small, semi-orbicular lobes with a deep sinus in the middle." Hagsater etal 2019


References W3 Tropicos, Kew Monocot list , IPNI ; * Icones Orchidacearum 17(1) Plate 1756 Hagsater & Jimenez 2019 Drawing fide;