Lellingeria amplisora Labiak

Authority

Labiak Evangelista, Paulo H. 2013. Grammitid ferns (Polypodiaceae). I. . Fl. Neotrop. Monogr. 111: 1--130. (Published by NYBG Press)

Family

Polypodiaceae

Scientific Name

Lellingeria amplisora Labiak

Type

Type. Peru. Amazonas. Prov. San Martin. Montane forest on sandstone or limestone, 05°41' S, 77°48' W, 1950 m, 04 Mar 2001, H. van der Werff, R. Vásquez, B. Gray & J. Campos 16737 (holotype, UC; isotypes, NY, MO).

Description

Latin Diagnosis - Lellingeria amplisora eius longis segmentis (usque 5 cm), numerosis soris (usque 18 paribus), normale ultra limitatem laminae marginem distinguitur. Haec species a L. majoris similis, a qua segmentibus menoribus, menore sororum numero (usque 10 paribus) et soris restrictis ad abaxialem superficiem laminae differt.

Species Description - Plants epiphytic; fronds erect to slightly arcuate determinate; rhizome long-creeping, dorsiventral, with ventral root insertion, scaly, the scales 4-6 x 0 4-0 6 mm, lanceolate to linear-lanceolate, the apex long-attenuate, clathrate, castaneous, ciliate, the cilia simple, present on scale margins, surface, and apex (apical cilia sometimes furcate); petiole 6-10 cm x 1-1.2 mm, dark brown, terete, densely pubescent, the hairs 0.1-0.2 mm long, spreading, simple or 1-furcate, 2- to 3-celled, whitish to reddish; lamina to 30-40 cm long, lanceolate, subcoriaceous, deeply pinnatisect, 45-60 pairs of segments, abruptly reduced at the base with 5-9 basal segments 2/3 shorter than the median ones, the lowermost auriculiform, broadest in the middle, not showing periodic constrictions, the apex abruptly reduced, pinnatifid, not ending in a subconform segment; rachis straight, with dark sclerenchyma visible on both sides, sparsely pubescent to glabrous abaxially, the hairs 0.1 mm long, appressed, simple, 2-celled, whitish to dark brown, densely pubescent adaxially, the hairs 0.1-0.2 mm long, spreading, simple, 1- to 2-celled, castaneous to reddish; segments ca. 2.5-5 cm x 0.2-0.3 cm, plane, set 80-90° to rachis, widened and symmetric at the base, short-decurrent on both sides, sometimes slightly cuneate acroscopically, the base attached parallel on the rachis (i.e., both sides inserted along the same radius), not lobulate or, if slightly lobulate, not overlapping the base of the next segment, the apex acute, the margin entire, plane, abaxial lamina surface sparsely pubescent, the hairs similar to those of the rachis abaxially, adaxial lamina surface glabrous; sinuses about twice as broad as the segments; venation pinnate, with 15—18(—20) pairs of veins per segment; costae with blackish sclerenchyma visible on both sides, glabrous or sparsely pubescent, the hairs similar to those of the rachis abaxially; veins simple, with blackish sclerenchyma restricted to base and obscured by laminar tissue, ending in hydathodes that lack calcareous deposits; sori medial, rounded, protruding beyond the margin, to 18 pairs per segment, superficial; sporangial capsules glabrous.

Discussion

Lellingeria amplisora is characterized by having long segments (up to 5 cm long) with numerous sori (to 18 pairs) that protrude beyond the segment margins and by costae with dark sclerenchyma visible on both sides. Lellingeria major is the most similar species but can be distinguished by having shorter segments (to 3 cm long), fewer sori per segment (to 10 pairs), sori not protruding beyond the segment margins, and costae with dark sclerenchyma obscured by laminar tissue on both sides (visible abaxially in some specimens).

Distribution

Endemic to eastern Peru at about 1950 m elevation.

Amazonas Peru South America|