— 52 — 



.1 have pleasure in naming this unique species after its discoverer, especially 

 as Pendleton, a small town near Manchester, was my birthplace, 

 Manchester, England. 



EXPLANATION OF PLATE IL 

 Aplozia Pendletonii Pearson 

 Fig. I. Plant, nat. size. Fig. 2. Portion of stem, X 16. 



Figs. 3-6. Leaves, X 24. Fig. 7. Cross-section of leaf, X SO, 



Fig. 8. Portion of leaf, X 290. 



[Plate prepared for reproduction by O. E. J.] 



GRIMMIA (GUEMBELIA) BREVIROSTRIS, SP. NOV. 



R. S. Williams. 



Dioicous, plants about like the fertile, with one or sometimes two widely 

 separated flowers, the inner perigonial leaves ovate, shortly, often obtusely pointed, 

 about I mm. long, the antheridia 0.6 mm. long, rather numerous, with paraphyses: 

 in compact brownish mats darker within; stems I or 2 cm. high, sparingly radi- 

 culose below, with irregular branches; stem-leaves erect-spreading, somewhat 

 flexuous when dry, scarcely changed or slightly more spreading when moist, 

 oblong-lanceolate, about 2.5 mm. long, gradually narrowed to a stout apex with- 

 out hair point, in cross-section showing a double layer of cells across upper part 

 of leaf; costa about 50 wide below, indistinct above; upper leaf-cells rather ob- 

 scure, somewhat roundish or quadratic, often slightly transversely elongate, 

 scarcely differing two-thirds down leaf and mostly 6 to 8 ^ in diameter, becom- 

 ing toward base square or rectangular and up to about 8 wide and 20 [L to 40^ 

 long, the walls not or slightly sinuous and mostly thickened in the basal part of 

 leaf toward the costa ; perichaetial leaves about like stem leaves but slightly 

 longer and more or less convolute, about 3.5 mm. long; seta straight or slightly 

 curved, twisted when dry, 2.5 mm. long; capsule oblong, smooth, without stp- 

 mata, slightly over i mm. long; annulus wanting; peristome teeth reddish or 

 golden brown, about 60 [L wide at base and 200 [k high or more, irregularly split 

 above and with narrow slits or paler, thinner areas, roundish to much elongate, 

 extending nearly to base, the outer face smoothish or faintly striate, the inner 

 minutely papillose; lid obliquely- short-beaked, its height a little exceeding its 

 basal diameter; calyptra cucullate; spores nearly smooth, about 8 (JL in diameter. 



Mountains near Buck's Valley, Plumas Co., Cal., at 5600 ft., on granite. 

 Collected by J. B. Leiberg, July 1900, no. 5445. 



New York Botanical Garden. 



EXPLANATION OF PLATE III. 

 Fig. I. Plant about natural size. 



2. Calyptra X 11. 



3. Two leaves of perichaetium, seta and capsule X 11. 



4. Part of peristome X 240. 

 5 and 6. Stem leaves X 35- 



7. Cross-section above middle of leaf X 270. 



8. Median leaf-cells X 270. 



9. Basal leaf-cells X 270, 



