Philonotis scabrifolia (Hook.f. & Wilson) Braithw.
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Authority
Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part One: Sphagnales to Bryales. Mem. New York Bot. Gard. 69 (1): 1-452.
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Family
Bartramiaceae
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Scientific Name
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Description
Species Description - Plants small to medium-sized (1-2 cm high), in dense, dull, green, yellow-green, or glaucous tufts, tomentose below, sometimes in lax, prostrate mats, simple or sparsely branched, often appearing dendroid when growing erect and bearing subfloral whorled branches. Leaves appressed or occasionally erect, ovate-lanceolate; margins denticulate throughout because of projecting cell walls, narrowly revolute in the upper half; costa rough at back and long-excurrent as a rough point; cells ± uniform throughout, quadrate to short-rectangular (except at the inner part ofthe base where they are longer and laxer), up to 25 µm long, 8-12 µm wide, with a single, coarse, central papilla on both surfaces. Dioicous. Perichaetial leaves elongate (3-4 mm long), ovate-lanceolate, long-acuminate. Setae straight, 3-4 mm long; capsules suberect, 3 mm long; operculum convex, bluntly pointed; exostome teeth ± orange! lanceolate, finely papillose with laterally prominent lamellae (especially in the upper part); endostome segments yellowish, smooth, from a low membrane. Spores subreniform, finely papillose, 17-28 µm. Sporophytes not seen in Mexican material.
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Discussion
Fig. 417a-d
P. scabrifolia (Hook.f. & Wils.) Braithw., Brit Moss Fl. 2:215.1893.
Hypnum scabrifolium Hook. f. & Wils. London J. Bot. 3: 552. 1822.
Bartramia appressa Hook./. &Wils., Fl. Nov. Zel. 2:89 1855.
B. catenulata Hampe, Linnaea 30:631.1859.
B. exigua Sull. in Wilkes, U.S. Expl. Exped. 11: pl. 8C. 1859.
Philonotis appressa (Hook/. & Wils.) Mitt, J. Linn. Soc, Bot 4- 81 1859.
Bartramia remotifolia Hook. f. & Wils., Fl. Tasman. 2: 193. 1860.
B. scabrifolia (Hook. f. & Wils.) C. Müll., Gen. Muse Frond. 334. 1901 [1900].
Anomodon perarmatus Williams, Bryologist 31: 112. 1928.
Coarse central papillae on both surfaces of leaf cells are diagnostic. The plants occasionally assume a lax, prostrate expression, especially when growing in rock crevices at low light intensities. They could then be mistaken for a pleurocarpous moss, but the glaucous appearance and position of papillae minimize possibilities for misidentification.
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Distribution
On rocks or in crevices of rocks and soil at upper elevations; Mexico Puebla, Tlaxcala, Veracruz.—Mexico to Chile; subantarctic islands- New Zealand and Tasmania; South Africa.
South Africa Africa| Australia Oceania| New Zealand Mexico North America| Central America| South America|