provided by North American Flora
Brothera leana (SulL) C. Mull. Gen. Muse. 259. 1901
Leucophanes? Leanum Sull. Musci Allegh. 172. 1845. Campylopus Leanus Sull. in A. Gray, Man. ed. 2, 619. 1856. Leucobryum Leanum Kindb. Eur. & N. Am. Bryin. 176. 1897. Brothera Ankerkronae C. Mull. Gen. Muse. 258. 1901.
Dioicous: fertile plants densely tufted, rather light-green, glossy, with mostly unbranched, more or less radiculose stems scarcely 1 cm. high, uniformly foliate with erectspreading, lanceolate-subulate leaves, 3-3.5 mm. long on the upper part of the stem, with a subtubulose point entire except at the very apex, and often bearing in the axils of the upper leaves numerous, nearly linear, pale, deciduous, rudimentary leaflets 0.5 to nearly 1 mm. long; costa filling most of the upper part of the leaf, one third or more the width of the leaf belqw, in cross-section near the middle showing large outer cells on the under side of the costa similar to the outer cells of the upper side with some smaller more or less disconnected median cells mostly in one row, not forming a distinct stereid-band ; cells of the leaf-blade pale, thin-walled, rectangular, narrow at the margin, broader and often lax within, the alar group pale, fragile, often scarcely distinct from those of the blade; perichaetial leaves very similar to the upper stem-leaves: seta up to 7 mm. long, smooth, erect, somewhat sinuous and twisted: capsule oblong to elliptic, 1-1.3 mm. long, without stomata, smooth above, slightly rugose at the base, the exothecal cells narrow, elongate, with thick, somewhat flexuous walls ; annulus large, of two rows of cells; peris tometeeth inserted below the mouth, divided to near the base into two subulate, indistinctly articulate, densely papillose forks; lid with a long, erect beak: calyptra large, cucullate, ciliate at the base: spores nearly smooth, 10-12 fi in diameter. (Description of fruit mostly from a Japanese specimen.)
Type locality: Ohio.
Distribution: Pennsylvania; Ohio; Minnesota; Mexico; also in Japan, the Amur region of Siberia, and the Himalaya region.
- bibliographic citation
- Robert Statham Williams. 1913. (BRYALES); DICRANACEAE, LEUCOBRYACEAE. North American flora. vol 15(2). New York Botanical Garden, New York, NY