Epidendrum leuconanum Hágsater & L.Valenz. 2019 GROUP Nanum


TYPE LCDP photo by R. Vásquez & A. Cisneros /Photo by R. Vásquez and The AMO Herbario Website


Common Name The White E nanum Epidendrum [in reference to the flower color]

Flower Size .4" [1 cm]

Found in central Peru on the eastern slope of the Eastern Cordillera of the Andes in the Parque Nacional Yanachaga-Chemillén, sector Tunqui, in primary montane forest on hills, at elevations around 1800 meters as a mini-miniature to small sized, cool growing epiphyte with laterally compressed, ancipitose stems, completely covered by evanescent, imbricating, foliaceous sheaths and carrying articulate, unequal, progressively smaller, evenly distributed throughout the stems, lanceolate, acute, succulent; sheaths tubular, strongly laterally compressed, ancipitose; blade lanceolate, twisted so as to be on the same plane as the stem, spreading leaves that blooms in the mid summer on a terminal, without a spathe, peduncle .2 [0.5 cm]long, very short; rachis .4 to .56" [1.0- 1.4 cm] long completely covered by bracts, .76" [ca. 1.9 cm] long, apical and axillary, short racemose sessile, opposite pairs, each pair at 90° to the previous pair, simultaneously up to 10 flowered inflorescence with decreasing, narrowly ovate-triangular, acute floral bracts and carrying resupinate, pale greenish white flowers with the fragrance not registered.

"Epidendrum leuconanum belongs to the GROUP Nanum, which is characterized by the Dichaea-like horizontal or pendulous stems, the inflorescence produced by pairs of opposite flowers without spathes, but with prominent floral bracts. The new species is recognized by the pale greenish white flowers and the thin pedicellate ovary, not inflated by the nectary; petals about half as long as the sepals. Epidendrum tingo-mariae Hágsater has an arched column with a prominent, erose clinandrium, green flowers, the anther also green, and the short nectary that does not penetrate further than the perianth. Epidendrum vesicinanum Hágsater & L.Valenz. grows in the same general area but in sclerophyllous forest on white sand and is easily distinguished by the smaller lateral lobes of the lip, green flowers and inflated pedicellate ovary behind the perianth. Epidendrum integrinanum Hágsater, from the Cordillera del Cóndor in Ecuador, has large, caespitose plants (about ca. 2.4 to 12" [6 to 30 cm] long, widely lanceolate leaves, cream-greenish tone flowers, the ovary clearly inflated by the deep nectary, dorsal sepal oblanceolate, lateral sepals oblanceolate-elliptic .372 to .3384" x .1 to .104" [9.3 to 9.6 x 2.5 to 2.6 mm], and by the small subentire lip, .16 x .1" [4.0 x 2.5 mm], the mid-lobe triangular (longer than wide) and the lateral lobes very reduced, hemi-orbicular and rounded. Epidendrum bonitense Hágsater & Dodson has long plants 4 to 12" [10 to 30 cm, stems horizontal to hanging, all covered with ancipitose sheaths, flowers glaucous green with a faint purple tinge, a long ovary .48" [12 m]), long sepals .48 [12 mm] and petals .4" [10 mm], respectively), a 3-lobed lip .2" [5 mm] long with mid-lobe sub-rectangular." Hagsater etal 2019


References W3 Tropicos, Kew Monocot list , IPNI ; * Icones Orchidacearum 17(1) Plate 1732 Hagsater & Jimenez 2019 LCDP Photo/photo fide; Icones Orchidacearum 17(1) Plate 1755 Hagsater & Jimenez 2019 see recognition section;