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!Weissia andersoniana R.H. Zander Search in The Plant ListSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenSearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font

Published In: Monographs in Systematic Botany from the Missouri Botanical Garden 11: 195. 1985. (Monogr. Syst. Bot. Missouri Bot. Gard.) Name publication detail

Project Name Data (Last Modified On 10/22/2013)
Acceptance : Accepted
Project data     (Last Modified On 10/22/2013)
Nomenclature: W. andersoniana Zand., Monogr. Syst. Bot. Missouri Bot. Gard. 11: 195. 1985.
W. glauca Bartr., Bryologist 30: 80. 1927, hom. illeg., non (Hedw.) W.-Arnott, 1827.
Distribution: On soil and bark at moderate elevations; Chihuahua and Coahuila. - Northern Mexico; southwestern United States.
Discussion: The more distinctive characters of the species are whitish-green leaves with a V-shaped border extending somewhat above the shoulders and antler-like papillae. In Tortella the cells of the V-shaped border are thin-walled. Weissia phascopsis Zand. (found in Canada and the United States) may have highly spiculose papillae on leaf cells, but the border is less marked, and the operculum is not or scarcely differentiated.
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Plants hoary-green above, brown below. Stems up to 3 mm long. Leaves 2-2.5 mm long, oblong-lanceolate, broadly acute, occasionally weakly cucullate; margins erect or weakly incurved, bordered by 1-2 rows of ± thick-walled and not or weakly papillose cells; costa with cells of ventral epidermis quadrate and papillose, those of the dorsal epidermis elongate and smooth; upper cells in longitudinal rows, 8-11 µm, evenly thick-walled, strongly bulging on both surfaces, with 2-4 spiculose-bifid papillae on both surfaces, raised on a solid or hollow column; basal cells differentiated across the leaf and extending upward along the margins to form a low V, up to 15 µm wide, evenly thick-walled. Autoicous. Setae 5-7 mm long, yellow-brown or brown, twisted clockwise; capsules 0.7-0.8 mm long, ovoid to short-cylindric, brown or yellow-brown; exothecial cells 1-2-layered, rectangular-rhomboidal, 18-25 µm and 2-3:1, thin-walled; annulus of 3-4 rows of cells, operculum 0.3-0.6 mm long, conic to rostrate; peristome rudimentary or consisting of 16 ligulate to triangular, irregularly cleft teeth up to 90 µm long, orange, spiculose-papillose, up to 7-jointed. Spores 15-18 µm, dark brown, densely papillose.

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