576 Williams: Mosses of Philippine and Hawaiian Islands 



HAWAIIAN SPECIES 



Dicranella hawaiica (C. Mull.) Broth. Oahu: Honolului 

 March, 1909, 1261. Determined from the description only. 



Hymenostomum ovale sp. nov. 



Dioicous, the male plant with a single terminal floM-er, the inner 

 antheridial leaves very short and broad, deeply concave, sometimes 

 obtuse, enclosing six to eight antheridia and rather abundant, 

 slightly longer paraphyses: growing in rather compact, pale green- 

 ish cushions with mostly simple stems 2-3 mm. high; stem- 

 leaves crispate when dry, 1.5-2 mm. long, nearly linear, acutely 

 pointed, the margins entire and more or less inrolled in the upper 

 three fifths either wet or dry; costa about 45 ii wide just above 

 the base and one sixth the width of the leaf-base, slightly excurrent 

 into a more or less incurved point, smooth on the back, in cross- 

 section near the middle showing four guide-cells, stereid bands 

 above and below them and outer cells on the ventral side large, on 

 the dorsal side, scarcely differentiated; leaf-cells mostly four-sided, 

 about 8 X 8 ju in upper part, rather obscure and finely papillose 

 on both upper and under surface, the basal cells rectangular, 8 n 

 wide by 25-30 ix long toward the costa, with slightly thickened, 

 pale, not hyaline walls; perichaetial leaves much like those of the 

 stem, but with slightly larger base; capsule oval, about i mm. long 

 without the lid, the lid subulate, obhque, often nearly as long; 

 exo thecal cells thin- walled, elongate-hexagonal to rectangular, 

 about 25 IX wide by 40-60 /x long, the stomata few, near the base, 

 sometimes not evident; annulus and peristome none; spores 

 rough, round, about 20 /x in diameter; calyptra cucuUate, extend- 

 ing far below the lid, the apex smooth. 



Oahu: Honolulu, March, 1909, 1247. 



Claopodium hawaiense sp. nov. 



Dioicous: growing in thin, yellowish green mats with irregu- 

 larly branching, smooth stems mostly less than i cm. long, bearing 

 few radicles and spreading-flexuous, not decurrent, somewhat 

 complanate leaves; leaves of stem and branches very similar, 

 about 0.5 mm. long, ovate-lanceolate, the tapering point serrulate, 

 the border of one row of more or less difl'erentiated cells, serrulate 

 all round; costa often pale, about 16 /i wide at the base, smooth, 

 extending into the point, sometimes appearing slightly excurrent; 

 cells of upper part of leaf mostly rhomboidal, about 6 /i wide by 16- 

 20 jj, long, below more elongate and irregular, the upper and median 

 cells mostly unipapillate on each side, the^ papillae sometimes 

 extending almost to the leaf-base and very pfominent on the 



