Williams: Mosses from west coast of South America 399 



and nodding, 2.5 mm. long without the Hd, the lid conic, in height 

 often but little exceeding its basal diameter; peristome of 32 pale, 

 nearly erect, very papillose teeth more or less contracted at the 

 joints, from a basal membrane about one-tenth the height of the 

 teeth; annulus of i or 2 rows of small cells adherent to the rim 

 of the capsule; calyptra cucullate, descending well below the base 

 of the lid; spores slightly rough, up to 25 ju in diameter. 



Peru: Lima, July, 18603c (type), 18603a; north of Lima, 

 July, 19523. 



A species much like some forms of T. montana in general 

 appearance. 



Tortula minuscula sp. nov. 



Dioicous, the terminal bud-like male flower at length appearing 

 lateral by the growth of a subapical branch; the antheridia about 

 0.3 mm. long, with abundant slightly club-shaped paraphyses: 

 plants in compact, dusky green mats with often branching stems 

 5-8 mm. high, having a distinct central strand; stem-leaves about 

 2 mm. long, appresscd or somewhat erect-spreading when dry, 

 rather broadly ovate-lanceolate, entire, the margins somewhat 

 recurved along the middle and thickened with i row of additional 

 cells in the narrow-grooved point; costa percurrent, often slightly 

 broadened and flattened near the middle of the leaf with a cross- 

 section showing 10 to 12 guide cells, a single row of cells nearly as 

 large on the ventral side and on the dorsal side a row' of slightly 

 smaller cells with a few stereid cells between them and the guide- 

 cells ; the cross-section near apex shows no stereid cells and only 2 

 guide-cells; cells of upper part of leaf very papillose on both sides, 

 the median often slightly transversely elongate, about 5 X 8 /i, 

 the basal short-rectangular to nearly square; perichaetial leaves 

 very similar to those of upper stem but with slightly larger and 

 paler base; seta 6-7 mm. long; capsule erect, ovate-oblong, 

 about I mm. long without the lid; the lid slightly oblique, conic- 

 subulate, scarcely 0.5 mm. long; peristome from a papillose basal 

 membrane projecting well above the annulus, of 32 erect or nearly 

 erect, very papillose teeth of irregular length; annulus of 2 or 3 

 rows of persistent cells; calyptra cucullate, smooth, descending 

 well below the lid; spores smooth, about 10 ii in diameter. 



Peru: Cuzco, September, 19520. 



Tortula muralis (L.) Hedw. 



Chile: Vina del Mar, near Valparaiso, September, 19105 \ Las 

 Vacas, near Chiapa, 19230a; vicinity of La Serena, 19289; vicinity 

 of Illapel, 19462, 1 94626; La Paloma, October, 19522. 



