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HYOPHILA SUBCUCULLATA SP. NOV. 



R. S. Williams 



Antoicous, i to 3 antheridia about 0.2 mm. long, with few or no paraphyses, 

 more or less enclosed by i or 2 concave, pale, smooth, costate leaves less than 

 0.5 mm. long, situated so close to the perichaetium as to appear at times par- 

 oicous: plants in cespitose, brownish-green mats with mostly simple stems 4 or 

 5 mm. long; stem-leaves incurved and more or less crispate with involute mar- 

 gins when dry, nearly straight and somewhat spreading when moist, the upper 

 about 2 mm. long, oblong to oblong-linear, widest about halfway up the leaf, 

 entire, the apex somewhat cucullate, rather broadly acute and shortly apiculate, 

 the lower leaves very small; costa stout, nearly or quite smooth on the back, 

 papillose on the inner face, about ^Ofx wide halfway up, excurrent, in cross- 

 section near the middle showing about 4 guide-cells, stereid cells above and 

 below them and outer cells differentiated, much larger on the upper than under 

 side; cells of upper part of leaf distinct, mostly mamillose and papillose on both 

 sides, more or less roundish to transversely elongate, the median 6-8^ in width, 

 the basal cells paler, smooth, irregularly elongate to rectangular, up to 60 or 

 8on long; perichaetial leaves not differentiated or sometimes a short inner leaf; 

 seta 4 to 5 mm. long; capsule elongate-oval, a little contracted below the mouth 

 when dry and empty, about 1.2 mm. long without the lid, the somewhat obliquely 

 beaked lid one-half to two-thirds as long, the stomata few, in one row close 

 to the base; peristome and annulus none; calyptra cucullate, extending half- 

 way down the capsule, becoming somewhat twisted on falling off; spores rough, 

 about 20/i in diameter. 



San Diego River, Pinar del Rio Province, Cuba. Brothers Leon and 

 Hioram, number 4515, August, 19 14. 



This species is perhaps nearest H. microcarpa but the inflorescence is differ- 

 ent, the capsules rather larger, the leaf-cells more distinct, and the apex of leaf 

 incurved, not somewhat recurved as in that species. 



New York Botanical Garden 



Explanation of Plate II 



HyOPHILA SUBCUCULLATA WILLIAMS, SP. NOV. 



Fig. I. Plant about natural size. 

 Fig. 2. Capsule with lid, X 16. 

 Fig. 3. Calyptra, X 16. 

 Fig. 4. Empty capsul% X 16. 



Fig. S- Part of rim and upper cells of capsule, X 180. 

 Fig. 6. Antheridia with bract, X 100. 

 Fig. 7 . Median leaf-cells, X 210. 

 Fig. 8. Basal cells, X 210. 

 Fig. 9- St oma, X 180. 



Fig. 10 a-cvA. 11. Cross-sections of leaf above and near the middle, X 180. 

 Fig. 12, 13, and 14. Stem-leaves, X 35. 



