Monographs Details: Lellingeria moranii Labiak
Labiak Evangelista, Paulo H. 2013. Grammitid ferns (Polypodiaceae). I. . Fl. Neotrop. Monogr. 111: 1--130. (Published by NYBG Press)
Description:Latin Diagnosis - Lellingeria moranii a L. tenuicula similis, a qua differ! squamis usque 0.5 mm longis, lamina lineari-eliptica et ra-chidi glabra cum sclerechymate nigro haud visibili.
Species Description - Plants epiphytic; fronds erect to arcuate, determinate; rhizome short-creeping, dorsiventral, with dorsiventral root insertion, scaly, the scales 0.3-0.5 x 0.1-0.2 mm, ovate-lanceolate, the apex short-attenuate, clathrate, castaneous, ciliate, the cilia simple, present on scale margin and apex; petiole 0.5-2 cm x 0.4-0.5 mm, dark brown, terete, densely pubescent, the hairs 0.1-0.2 mm long, spreading, simple or 1-furcate, 1- to 3-celled. whitish; lamina up to 15 cm long, linear-elliptic, chartaceous, deeply pinnatisect, (20-)25-35 pairs of segments, gradually reduced at the base with 2—3(—4) basal segments shorter than the medial ones, the lowermost auriculiform, short-decurrent onto petiole base, broadest near the middle, not showing periodic constrictions, the apex abruptly reduced, pinnatifid or sometimes ending in a subconform and segment; rachis straight, with dark sclerenchyma visible abaxially, obscured by laminar tissue adaxially (not visible), densely pubescent abaxially, the hairs 0.1-0.2 mm long, entire or 2(-3)-furcate, 1- to 3-celled, whitish to castaneous, glabrous adaxially; segments 0.8-1.2 x 0.2-0.3 cm, plane, set 60-70° to rachis, more or less symmetrical, slightly widened at the base (sometimes slightly constricted just above the base), short-decurrent basiscopically, short excurrent acroscopically, the base attached parallel on the rachis (i.e., both sides inserted along the same radius), not lobulate, the apex acute to obtuse, the margin entire, sinuate, slightly pubescent, the hairs 1-furcate, similar to those of the rachis, abaxial lamina surface glabrescent, the hairs similar to those of the rachis, adaxial lamina surface glabrous; sinuses narrower than the segments; venation pinnate, with 4-6 pairs of veins per segment; costae with black sclerenchyma visible, glabrescent, the hairs similar to those of the rachis; veins simple, without blackish sclerenchyma, ending in hydathodes that lack calcareous deposits; sori medial, rounded, not protruding beyond the costa and margin, 4-6 pairs per segment, superficial to slightly sunken; sporangial capsules glabrous.
Discussion:Lellingeria moranii resembles L. tenuicula, which can be distinguished by having longer rhizome scales (2-3 mm long), a more elliptic lamina, and the adaxial
side of the rachis pubescent and with dark exposed sclerenchyma (blackish). In contrast, L. moranii has small scales (to 0.5 mm long), a linear-elliptic lamina, and a glabrous rachis with dark sclerenchyma obscured adaxially by laminar tissue.It also can be confused with Lellingeria kaieteura but the laminar tissue in that species completely covers the dark sclerenchyma of the costae on the abaxial side, whereas it is visible (blackish) in L. moranii Additionally, the segments in L. moranii tend to have sinuate margins, and the lamina is linear-elliptic whereas the segment margins are plane, and the lamina is broad elliptic in L. kaieteura.The epithet honors the American pteridologist Robbin C. Moran (born 1956), curator of pteridophytes at The New York Botanical Garden.
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