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BFNA Title: Neomacounia |
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XX.
NEOMACOUNIA Plants small to medium sized. Stems creeping, sparsely branched;
flagelliform branches absent. Paraphyllia
absent. Pseudoparaphyllia
absent or scarce. Stem and branch
leaves erect, imbricate, concave, symmetric to asymmetric, some finely
plicate, ovate to oblong-ovate, apex abruptly acute to acuminate; margins
serrulate to serrate at apex; costa none, short-double, or rarely single;
apical cells irregularly rhomboidal, pitted, distal medial cells irregularly
long-rhomboidal, basal cells irregularly rectangular, pitted, alar cells
quadrate to oblong. Inner perichaetial
leaves oblong to obovate-oblong, sheathing at base, apex acute; margins
entire; costa single. Sexual condition
autoicous. Seta 0.4-0.5 mm. Capsule erect, globose; peristome
single, exostome teeth narrowly lanceolate, slightly striate at base, smooth
distally. Calyptra cucullate,
smooth. Spores globose, ovoid or
ellipsoid, 24--28 \um. Species 1:
North America ( Neomacounia, a monotypic genus, was originally
described to accommodate a species originally placed in Forsstroemia. R. R. Ireland (1974) used nine characters, namely
of capsule, seta, calyptra, branchlets, costa, leaves, distal and basal leaf
cells, and pseudoparaphyllia, to support the placement of this genus in the
Neckeraceae. SELECTED
REFERENCES: 1. Neomacounia nitida (Lindberg) Forsstroemia nitida Lindberg, Oefvers. Förh. Finska
Vetensk.-Soc. 12(2): 73. 1869; Leptodon
nitidus (Lindberg) Sullivant Plants 6 cm. Stem and branch leaves 0.6--1.9 x 0.4--1.0 mm; distal medial
cells 23--42 x 5--9 \um. Neomacounia was originally collected from trunks
of elm trees in |
