Acanthocoleus aberrans var. aberrans
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Authority
Gradstein, S. Robbert. 1994. Lejeuneaceae: Ptychantheae, Brachiolejeuneae. Fl. Neotrop. Monogr. 62: 216. (Published by NYBG Press)
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Family
Lejeuneaceae
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Scientific Name
Acanthocoleus aberrans (Lindenb. & Gottsche) Kruijt var. aberrans
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Type
Type. Mexico. Veracruz: Huatusco, Liebmann 395 (holotype, W; isotypes, C, G).
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Synonyms
Phragmicoma acuminata Lindenb. & Gottsche, Dicranolejeunea neesiana Steph., Dicranolejeunea pulchella Herzog, Acanthocoleus fulvus R.M.Schust., Lejeunea aberrans Lindenb. & Gott, Symbiezidium aberrans (Lindenb. & Gott) Trevis., Dicranolejeunea aberrans (Lindenb. & Gottsche) Steph., Dicranolejeunea acuminata (Lindenb. & Gottsche) Steph., Lejeunea aberrans var. conferta Gott
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Description
Species Description - Autoicous. Plants 1-2 cm long × 0.6-1.5 mm wide, brownish. Stems ca. 0.15 mm in diam., in cross section composed of 11-12 epidermal cells surrounding numerous medullary cells, dorsal epidermal cells about as large as the ventral epidermal cells; ventral merophyte two cells wide. Leaves contiguous to imbricate, dorsal lobe ovate, 0.7-0.9 × 0.5-0.7 mm, apex apiculate to short acuminate, never rounded, margins entire to slightly toothed near apex, ventral margin forming a rather sharp angle of ca. 90-140° with the keel; median cells ca. 30-40 × 25 µm, with very small, cordate trigones; oil bodies (Schuster, 1970) small, 10-15(-25) per cell, finely segmented, Jungermannia-type, ellipsoid to subglobose, ca. 3-8 × 2-2.5 \im. Lobules ovate, up to 0.3 mm long, l/4-2/5× lobe length, never (?) reduced, keel arched, free margin with 1-2 teeth separated from each other by 3-7 margin cells, first tooth (1)2-3 cells long, inflexed, second tooth smaller, 1-2 cells long. Underleaves subimbricate, ca. 0.4 mm, 3× stem width, margins plane, insertion line arched. Androecia on short Lejeunea-type branches, spicate or capitate, bracts in 2-6 series, modified, about half the size of the leaves, lobule strongly inflated, about 1/3-2/3× bract lobe, bracteoles smaller than underleaves; (l-)2 antheridia per bract. Gynoecia with l(-2) innovations, the innovation normally sterile, bract lobes ovate-oblong, up to 0.7 mm long, apex apiculate to short acuminate, margins entire or toothed near apex with 1-5 teeth, lobule very small, sometimes reduced, keel smooth; bracteoles 0.5-0.6 mm long, margins plane. Perianths subcylindrical, up to 1 mm long × 0.5-0.6 mm wide, emergent to 1/3-1/2, with 4-5(-6) sharp keels: 2 lateral, 2(-3) ventral and 0-1 dorsal keel, the keels dentate-ciliate above, the lateral keels sometimes winged; beak 2-4 cells long.
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Objects
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Distribution
Mexico, Costa Rica, Jamaica, French Guiana, at altitudes of 150-1500 m. Acanthocoleus aberrans var. aberrans is a rather rare neotropical taxon, which has been gathered only a few times. It grows on bark or rock in rather open woodlands and scrub and on isolated trees. In French Guiana it has been collected in the outer canopy of virgin rain forest. It lacks in the more humid, shaded portions of the rain forest.
Mexico North America| Chiapas Mexico North America| Hidalgo Mexico North America| Guatemala Central America| Alta Verapaz Guatemala Central America| Costa Rica South America| Jamaica South America| Dominica South America| French Guiana South America|