Microcoelia dolichorhiza (Schltr.) Summerh., Bot. Mus. Leafl. 11: 153 (1943).
Angraecum dolichorhizum Schltr., Ann. Inst. Bot.-Géol. Colon. Marseille, III, 1: 192 (1913).
Gussonea dolichorhiza (Schltr.) Schltr., Beih. Bot. Centralbl. 33(2): 425 (1915).
Stem small, c. 17 mm long, c. 4 mm in diameter. Scale-leaves acuminate, with 5(-7) nerves, up to 4.5 mm long. Roots many, ± free, slender, twisting, ± terete, smooth, distal ends branched, up to 20 cm long, 1-2 mm in diameter, lnflorescence(s) erect, spreading, up to 15 mm long, up to 4 simultaneously, usually dense, each with up to 10-12 flowers; peduncle short, up to 5 mm long; rachis straight to sub-flexuose, carmine rose; bracts sheathing, acute, basal 3-nerved, apical 1-nerved, up to 1.5 mm long. Pedicel long, ± curved, up to 7 mm long, carmine rose; ovary ± straight, faintly furrowed, up to 1.7 mm long, 0.5 mm in diameter, carmine rose. Flowers ± erect, spreading, up to 12.5 mm long including ovary and pedicel; whitish tinged with carmine rose. Glandular hairs ± sparse, on rachis, bracts and pedicel, ovary and at the base of the outer and inner sides of dorsal sepal, and on the outer basal side of lateral sepals and petals. Dorsal sepal ± hooded, obovate, acute, distinctly connate up to c. 1/3 from the base, 3-nerved, c. 3.0 x 1.6 mm. Lateral sepals asymmetric, curved, ovate, acute, distinctly thickened along the mid-nerve and connate at the base, 3-nerved, c. 3.4 x 3.2 mm. Petals small, narrowly triangular, 1-nerved, c. 2.5 x 0.7 mm. Labellum indistinctly 3-lobed; mid-lobe triangular, ± concave, 3-nerved; side-lobes fleshy, cupular, ± closing spur mouth, c. 3.1 x 1.3 mm, mid-lobe alone up to 2.5 mm long; spur ± appressed to ovary and pedicel, ± straight, apex obtusely inflated, c. 5 mm long. Column short, slightly raised, truncate, c. 0.9 mm long, c. 1.0 mm high; androclinium shallowly excavated, ± vertical; rostellum lobes short, ± porrect, acute, con cave, up to 0.9 mm long, each lobe up to 0.35 mm wide. Anther bivalvate at the base; in side view ± oblong, tapering into a distinctly ± truncate recurved apex, up to 1.7x1.1 mm. Pollinia ± discoidal; in side view ± orbicular, with facets, c. 600 x500 µm, in median section — oblong, up to c. 300 µm thick. Stipes ± straight from a curved flattened base, bifid for about 3/4 of the total length, channelled apically, up to 2 mm long; each branch ligulate, tapering into a cupshaped apex, ± circular in outline, up to 500 x 500 µm; viscidium convex, ± oblong, obtuse, base rounded truncate, up to c. 0.8x0.4 mm.
Dense rain forest, epiphytic on tree branches. Altitude. 1000 m.
Recorded from the early rainy season, i.e., the cyclone time.
As given for the genus.
One of the species in which the stipes is divided in the upper part. Its most striking feature is the presence of two plate-like transverse lamellae one on each side at the mouth of the spur.
N. & NW. Madagascar
WCSP (2017). 'World Checklist of Selected Plant Families. 03.03-2017; http://apps.kew.org/wcsp/
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