Monographs Details: Lellingeria affinis Labiak
Labiak Evangelista, Paulo H. 2013. Grammitid ferns (Polypodiaceae). I. . Fl. Neotrop. Monogr. 111: 1--130. (Published by NYBG Press)
Description:Latin Diagnosis - Lellingeria affinis a L. apiculata similis, a qua differt frondibus majoribus (30-40 cm long.) caulis squamis etiam majoribus (4-5 mm) et rachidi ad abaxialem superficiem leviter pibescenti. In L. apiculata, frondes inter longitudem 15 cm usque 20 cm lundunt, caulis squamae 2-3 mm longis, et rachis ad abaxialem superficiem conspicue pubescens.
Species Description - Plants epiphytic. Fronds erect to arcuate, determinate; rhizome short-creeping dorsiventral scaly, 4-5 × 0.2-0.4 mm, lanceolate, the apex long-attenuate, clathrate, light brown, ciliate, the cilia simple, present on scale margins and apex (apical cilia sometimes furcate); petiole 2-8 cm x 0.7(1) mm, dark brown, terete, densely pubescent, the hairs 0.1-0.2 mm long, spreading, simple (1-celled) or 1-furcate (3-celled), whitish; lamina 30-40 cm long, lanceolate, chartaceous, deeply pinnatisect, 45-60 pairs of segments, truncate at the base with 1-2 basal segments about 1/2 the length of the medial ones, not auriculiform and not decurrent onto petiole base, broadest above the base, not showing periodic constrictions, the apex abruptly reduced, pinnatifid or ending in a subconform segment; rachis straight, with dark sclerenchyma visible on both sides, glabrescent abaxially, the hairs simple (1-celled) or furcate (3-celled), yellowish, densely pubescent adaxially, hairs ca. 0.1-0.2 mm long, mostly simple (1-celled), rigid and reddish; segments 2-2.5 x 0.2-0.3 cm, plane, set 80-90° to the rachis, widened and symmetric at the base, short-decurrent basiscopically, slightly cuneate acroscopically, the base attached parallel on the rachis (both sides inserted along the same radius), not lobulate or overlapping the base of the next segment, the apex acute to obtuse, the margin entire, plane or slightly revolute, glabrous or sparsely pubescent, the hairs similar to those of the rachis abaxially, abaxial lamina surface glabrescent, the hairs furcate, similar to those of the rachis abaxially, adaxial lamina surface glabrous; sinuses about the same width as the segments; venation pinnate, with 10-12(-14) pairs of veins per segment; costae not visible (black sclerenchyma obscured by laminar tissue) or only partially visible abaxially, glabrous or sparsely pubescent, the hairs furcate, similar to those of the rachis; veins simple, with blackish sclerenchyma restricted to base, obscured by laminar tissue, ending in hydathodes that lack calcareous deposits; sori medial, rounded, not protruding beyond the costa and margin, 8-12 pairs per segment, superficial; sporangial capsules glabrous.
Discussion:Lellingeria affinis resembles L. apiculata because both have rachises that are densely pubescent on the adaxial side (the hairs straight and reddish) and lamina truncate at the base with the basal segments about half the length of the medial ones (not auriculiform) and often having a conform apical segment. It differs from L. apiculata, however, by having longer rhizome scales (4-5 mm vs. 2-3 mm long), larger fronds (30-40 cm vs. 10-15(-20) cm long), and rachises only slightly pubescent abaxially vs. conspicuously pubescent. This close relationship also is supported by the phylogenetic analysis by Labiak et al. (2010b), where they were found to be sister species.Because of its long fronds, Lellingeria affinis also may be confused with L. major, which differs by having a gradually reduced lamina base (several small and auriculiform segments), rachises glabrescent abaxially, and a subcoriaceous texture.The epithet refers to the similarity of this species to L. apiculata.
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