Zygodon trichomitrius Hook. & Wilson

Species

Bryophytes > Orthotrichales > Orthotrichaceae > Zygodon

Characteristics

Plants medium-sized to large, loosely caespitose to caespitose, yellowish green or light green to green above, olivaceous or yellowish brown to brown below; corticolous. Stems frequently falcate above, up to 40 mm tall, branching by subperichaetial or subperigonial innovations, sparsely tomentose to tomentose below; rhizoids smooth to coarsely papillose, reddish brown to red; in section subpentagonal or subround, inner cortex 7-11 cells across, thin-walled, incrassate towards outside, outer cortical cells smaller, in 2-4 rows, consisting of sub-stereids or stereids. Leaves ± crowded, ± equal in size to larger above, twisted or contorted when dry, widespreading to squarrose and recurved when wet, infrequently rugulose, in 5 indistinct rows, spiralled around stem; narrowly oblong-lanceolate or lanceolate, (1.7-)2.0-3.4 (-3.7) mm long; ventral surface keeled; apex acute to rounded-acute to rounded-obtuse, mucronate, cells of mucro fusiform, smooth, incrassate, with single tooth; base scarcely differentiated, ± sheathing, margins decurrent; margins plane, generally crenulate, unistratose. Costa merging with elongated cells of mucro, ventral and dorsal superficial cells long-rectangular to linear; in section subround, bulging dorsally, lamina ventrally inserted, 2-4 guide cells exposed ventrally, ventral stereid band absent, dorsal stereid band 1-3 cells thick, dorsal surface cells not differentiated, rough. Upper laminal cells irregularly rounded-hexagonal, flat, 7.5-15 µm, papillae low, blunt, scattered; basal cells rhomboidal to rectangular, thin-walled to incrassate, smooth or with single papilla over lumen or papillose along walls. Gemmae numerous, on stem, subclavate, uniseriate with transverse septa, 3-5 cells long, reddish brown. Dioicous. Perigonia terminal, quickly overgrown by subperigonial innovation; leaves broadly ovate, ovate-apiculate or shortly ovate-acuminate. Perichaetia terminal; leaves scarcely differentiated, inner leaves occasionally linear from a lanceolate base, shorter, 1.2-2.8 mm long, apex acuminate. Seta 8.5-11.0 mm long, brownish. Capsule narrowly pyriform, brownish, plicate, mouth 3-or 4-sulcate when dry, orange to brown, urn 1.4-2.0 mm long, neck 0.5-0.8 mm long; exothecial cells irregularly quadrate to rectangular, smaller at mouth, longitudinal walls incrassate above; annulus apparently absent. Peristome absent. Operculum 1.0-1.5 mm long, straight to oblique. Calyptra 2.6-3.0 mm long, sparsely hairy, hairs uniseriate, ascending, smooth to crenulate, cells occasionally prorate distally above. Spores 17-20 µm.
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Mature height (meter) 0.04
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Soil texture 7-8
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Cultivation

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Distribution

Zygodon trichomitrius world distribution map, present in South Africa

Identifiers

LSID 35145320
WFO ID wfo-0001172607
COL ID 5DB5W
BDTFX ID -
INPN ID 843525
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Zygodon trichomitrius

Lower taxons

Zygodon trichomitrius var. mildbraedii