Racomitrium lamprocarpum (Müll.Hal.) A.Jaeger

Species

Bryophytes > Grimmiales > Grimmiaceae > Racomitrium

Characteristics

Plants medium-sized, in tufts, blackish to olive-green; saxicolous. Stems erect, 10-40 mm high; in section round, central strand absent, inner cortical cells small, in 8-10 rows, thin-walled, becoming smaller toward margin, thickened, yellowish, outer cortical cells in 2-4 rows, small, stereids to substereids, red-yellow. Leaves erect dry, recurved wet, weakly secund, lamina bistratose becoming multistratose toward margins; ovate-acuminate, 3.5-4.5 mm long; apex acute, without hair-point, occasionally with short hyaline tip; base auriculate; margins incurved below, entire, without basal border of smooth-walled cells. Costa strong, broad, ending in apex; in section reniform, cells in 4-5 rows, large, incrassate, undifferentiated. Laminal cells short-rectangular, incrassate, nodose; alar cells forming distinct auriculate group, enlarged, thin-walled, smooth-walled, occasionally red-brown. ?Dioicous. Perigonia not seen. Perichaetia terminal; leaves not differentiated. Seta to 4 mm long, dark red; capsule elliptical, 2 mm long; peristome teeth 2-3-cleft to below middle, vertically striate below, ornately papillose above, yellowish orange; operculum rostrate, to 1 mm long; spores round, 12-13 µm, granulate.
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The plants are coarse and rigid, dark olive-green above and blackish below. The leaves are epilose, straight to falcate, 3.0-3.5 x 0.91.1 mm, entirely 2-4-stratose distally, with a 2-5-layered marginal border of many rows of cells which extend from the base to the apex and merge imperceptibly with the laminal cells in the distal part. The laminal cells are entirely smooth throughout the whole lamina and bear no hint of pseudopapillosity. The alar groups are composed of large and moderately thick-walled cells and form pronounced, orange-brownish, pellucid decurrencies. The costa is stout, strongly convex on the abaxial side and reniform on the adaxial side in the proximal part. The capsules are obloid, 1.8-2.0 mm long, lustrous and blackish-brown, and the spores are coarsely papillose and large, 20-28 µm in diameter.
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Foliage retention deciduous
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Mature height (meter) 0.01 - 0.04
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Cultivation

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Distribution

Racomitrium lamprocarpum world distribution map, present in South Africa

Identifiers

LSID 35144700
WFO ID wfo-0001172115
COL ID 7946Q
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Wikipedia (EN)
Wikipedia (FR)

Synonyms

Racomitrium dixonii Racomitrium levieri Grimmia nigroviridis Grimmia pseudoacicularis Grimmia subnigrita Racomitrium defoliatum Racomitrium lamprocarpum Racomitrium limbatum Racomitrium looseri Racomitrium pachyneuron Grimmia sublamprocarpa Racomitrium subnigritum var. alvarezianum Grimmia nigro-viridis var. robusticula