Epidendrum rimarachinii Hagsater 2019 GROUP Arbuscula SUBGROUP Incomptum


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

Common Name Rimarachin's Epidendrum [In honor of Edwal Adelmo Rimarachin Mena (1995- ), of San José de Lourdes, Cajamarca, Peru, who participated in the collection of the type. He is an agricultural technician of the Instituto de Educación Superior Tecnológico Público “4 de junio de 1821” at Jaén; grower, collector and protector of orchids. He rescues species from disturbed forests and safeguards them in a family vivarium in order to conserve the genetic material]

Flower Size .4" [1 cm]

Found in Cajamarca department of Peru in disturbed forests on Coffea sp. stems at elevations around of 1670 meters as a small sized, cool growing epiphyte with erect, simple, cane-like, thin, terete, new stem arising from the middle of the previous stem carrying 3 to 6, aggregate towards the apical half of the stem, recurved, alternate, base embracing the stem; blade sub-equal, grass-like, lanceolate, acute, green, concolor leaves that blooms in the late summer to early fall and again in the late winter and early spring on a terminal, erect, without a spathe, peduncle .52 to .96" [1.3 to 2.4 cm] long, rachis 1.08 to 3.2" [2.7 to 8.0 cm], arching, nutant, 1.4 to 3.48" [3.5 to 8.7 cm] long, apical, racemose, slightly laterally compressed, not ancipitose, lax, successively several, 5 to 28 flowered inflorescence with shorter than the ovary, triangular, acute, embracing floral bracts and carrying resupinate flower with the sepals and petals green, lip brown, calli and column green, anther pale green and with the fragrance not registered.

"Epidendrum rimarachinii belongs to the GROUP Arbuscula SUBGROUP Incomptum which is characterized by the successive lateral growths produced from the middle of the previous growth, the few leaves aggregate towards the apex of the stems, a short apical inflorescence with fleshy green to violet-green flowers with short ovaries, and the lip entire to 3-lobed. The species is recognized by the sepals about half as wide as they are long, .52 to .6" x .24 to .36" [13 to 15 x 6 to 9 mm], petals oblanceolate, 3-veined, .52.6" x .13 to .16" [13 to 15 x 3 to 4 mm], and the 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, bicallose, lateral lobes .36 x .72" [9 x 16.5 mm], transversely obovate, wider towards the apex; mid-lobe .1 x .26" [2.5 x 6.5 mm], receded, formed by two small, semi-orbicular lobes, with a deep sinus in the middle. Epidendrum albazoënse Hágsater & Salas Guerr. has green flowers turning yellowish, tinged purple, especially at the apex of the column, and over the veins of the lip marked by purple dots, sepals are .588 to .08" [14.7 to 20 mm] long, petals narrowly elliptic, base narrowly cuneate, acute, 3-veined, the lip 3-lobed, .34 x .64" [8.5 x 16 mm]; the lateral lobes sub-reniform, at an oblique angle, the widest part of the lip between the apices of the lateral lobes; mid-lobe .836 x .26" [2.9 x 6.5 mm], sub-rectangular, apex deeply retrorse, corners rounded. Epidendrum incomptum Rchb.f. has narrowly obovate sepals, petals linear-oblanceolate, 1-veined, lip .4 to .6" x .52 to 1.12" [10 to 15 x 13 to 28 mm], 3-lobed, slightly convex, ecallose; lateral lobes divaricate, obliquely ovate, and mid-lobe sub-quadrate, truncate. Epidendrum xelidorimarachinii Hágsater & E. Santiago has lip 3-lobed, slightly convex, margins entire, spreading; lateral lobes .36 to .4" x .36" [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." Hagsater etal 2019


References W3 Tropicos, Kew Monocot list , IPNI ; * Icones Orchidacearum 17(1) Plate 1750 Hagsater & Jimenez 2019 Drawing fide; Icones Orchidacearum 17(1) Plate 1756 Hagsater & Jimenez 2019 see recognition section;