Bartramia potosica Mont.
-
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.
-
Family
Bartramiaceae
-
Scientific Name
-
Description
Species Description - Plants variable in size (1-5 cm high), in dense dark- to yellow-green tufts, tomentose below, simple or sparsely branched. Leaves rigidly erect-appressed, rarely more laxly erect or ± flexuose, with brittle tips, 4-6 mm long, abruptly linear from an oblong, sheathing base; margins serrate and sometimes narrowly revolute above the flaring shoulders, the teeth single or paired; costa excurrent; upper cells rectangular, up to 35 µm long, 4-6 µm wide, obscure, papillose at the ends; inner basal cells laxer, up to 150 µm long, 8-10 µm wide; marginal cells at shoulders hyaline, delicate, often appearing collapsed or eroded. Dioicous. Perichaetial leaves not conspicuously elongate. Setae slightly curved, 4-6 mm long; capsules suberect, 2-2.5 mm long, subglobose, furrowed; operculum convex, bluntly short-pointed; exostome teeth 275 µm long, lanceolate, not cleft, faintly papillose; endostome nearly as long as the exostome, the segments keeled, yellowish, divided to the middle or more into 3-4 forks, finely papillose. Spores reniform, verruculose, 25-30 µm.
-
Discussion
Fig. 429
B. potosica Mont., Ann. Sci. Nat. Bot. II, 9: 56. 1838.
B. thrausta Schimp. ex Britt, Bull. Torrey Bot. Club 23: 486. 1896.
The stiffly erect, brittle-tipped leaves and dioicous sexuality give distinction to B. potosica. Bartramia mathewsii, also dioicous, has erect, brittle leaves and much longer perichaetial leaves.
-
Distribution
On soil and rocks at middle to upper elevations; Distrito Federal, Durango, Hidalgo, Mexico, Michoacan, Oaxaca, Puebla, Tlaxcala, Veracruz.—Mexico to Peru; reported from the Dominican Republic.
Mexico North America| Central America| Colombia South America| Ecuador South America| Peru South America| Dominican Republic South America|