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Bryum blindii Bruch & W. P. Schimper [Bryaceae]
map of distribution

Plants erect in green to yellow green wefts to 1.5 cm high. Leaves concave, ovate to ovate lanceolate with obtuse to bluntly rounded apices, to 1 mm long, about 2–3: 1, erect spreading to imbricate when moist, little changed upon drying, not plicate. Median laminal cells narrowly prosenchymatous with walls thick (lumen: wall ratio 1–2: 1) 6–8: 1, often vermiculose, completely smooth, not pitted, to 15 µm wide. Basal and alar cells shorter and broader than median cells. Margins not decurrent, plane and entire to minutely serrulate. Limbidium not clearly demarcated, unistratose throughout. Costa yellowish to somewhat reddened at base, percurrent or short-excurrent to subpercurrent. Axillary hairs to 2 cells long, to 70 µm, with a short but unpigmented basal cell and a much inflated and thin-walled terminal cell. Rhizoids papillose, brown, sparingly branched, surrounding an isodiametric macronematal area to 60 µm wide. Stem cross-section round, without a central strand, with hyaline and leptodermous inner corticals abruptly transitting to a single layer of only moderately pachydermous, red brown outer cortical cells, without a hyaloderm. Gemmae usually present in upper leaf axils, short-elliptic with numerous erect juvenile leaves.
    Dioicous with male plants similar to females. Perichaetial leaves to 1.5 mm long, markedly larger than the vegetative leaves. Seta red-brown to violaceous, smooth, erect but geniculate distally, to 15 mm long. Urn to 2 mm long, pyriform, pendent, neither sulcate nor strumose. Operculum short conic. Annulus prominent, revoluble, with inflated and thin-walled cells. Exothecial cells at capsule mouth to 15 µm broad, transversely elongate in up to 4 rows. Exothecial cells at middle of urn rectangular, to 1.5: 1, to 22 µm broad, in regular rows, evenly thick walled with lumen: wall ratio 0.25–1: 1. Stomates restricted to neck of capsule, raised on short pustules, round. Exostome yellow brown, to 300 pm long, inconspicuous shouldered, densely to rather remotely papillose with prominent dorsal lamellae. Endostome segments arising from a high basal membrane, smooth to lightly papillose, about as long as exostome, narrowly perforated along keel with 1–2 appendiculate to nodose cilia. Calyptra cucullate, mostly shed before capsule maturity. Spores to 15 µm, finely papillose.

Mail a correction to Paul Wilson ·
LiteratureMcGrew 1976; Shaw 1981e; Spence 1988a.
IllustrationsCrum and Anderson 1981; Ireland 1982; Lawton 1971.
VouchersButte Co.: Thermalito near Oroville Airport, Thermalito Afterbay, Ahart 10024, 10025 (UC); Solano Co.: Jepson Prairie Ecological Reserve, Norris 101397.

Elevation by latitude plot for Bryum blindii
   in California

Generated: Wed Aug 21 12:03:32 2019