— 13 
Rhacomitrium microcarpum. (i), (2) Plants, Xi. (3) Capsule, X17. (4) Leaf, Xi 7 - ( 5 ) 
Parts of leaf-tip, X200. ( 6 ) Capsule, X17. ( 7 ) Leaf, X17. ( 8 ) Cross section of leaf-margin 
near hyaline point, X550. (9) Cells of leaf-middle, X400. (10) Capsule, X17. 
13. Rhacomitrium palmeri Kindb. Rev. Bryol. 23: 19. 1896. [R. micro- 
carpum palmeri Kindb.; R. tenuinerve Kindb.] 
Plants densely tufted. Stems 2-3 cm. long; elongated branches none or 
few, short tuft-like lateral branches none to few. Leaves blackish to yellowish- 
green when dry, keeled, hardly papillose, nearly smooth, long-pointed, the upper 
faintly crisped when dry; hyaline point wholly lacking in all the leaves; margin 
entire, 1 cell thick throughout; vein faint, vanishing far below the apex. Cells 
narrow, 2-8 times as long as wide; alar cells large, rectangular. Seta mostly 
immersed, about 5 mm. long, twisted to the right, smooth. Capsule-body 
1 .4-1. 5 mm. long, oval, about .6 mm. wide. Peristome-teeth deeply cleft, about 
.25 mm. long. — Alaska and British Columbia. 
