Fissidens longidecurrens

Fissidens longidecurrens Th^r. Smithson. Misc. Coll
782; 10. 1926.
Fissidens fiexuosus Th6r. Smithson. Misc. Coll. 782; 11. 1926.
Stems 7-12 mm. high; leaves 12-15 pairs, smaller below, contorted when dry, soaked out with difficulty, oblong-lanceolate, broadly acuminate, subacute, 1.2-2.0 X 0.4-0.5 mm., the border of 1-2 rows of narrow cells (6-8 rows on vaginant laminae), not reaching the apex, the costa vanishing just below the apex; vaginant laminae two-thirds to three-fourths the length of the leaf; dorsal lamina long-decurrent, sometimes reaching the leaf below; leaf-cells obscure, 6-7 m» irregular, thinwalled; dioicous; seta geniculate-flexuous, 3 mm. long; capsule suberect, nearly symmetric, oblong but narrowed at base; operculum conic-rostrate.
Type locality: Morelia, l^oma Santa Maria, Mexico {Ars^ne 4892, 4906; isotype seen). Distribution: Known only from the type locality.