395 
“igtatum, Bruch; so does Limpricht, but on different characters, 
Venturi basing the distinction on the papilla and upper cells of 
the leaves, whereas Limpricht distinguishes them by the teeth 
being striolate in O. fastigiatum, and papillose in O. affine. Braith- 
waite maintains fastigiatum as a variety distinguished by the 
smaller size and dark green color of the plants, and the urceolate 
capsule. It will be noted, also, that although Venturi places 
_ €ffine among the species with superficial stomata in his key, he 
figures it with the cells around them overlapping the guard cells. 
Braithwaite figures them radiating. ; 
The stomata are described by Limpricht as being in two rows 
around the middle of the capsule in O. affine, whereas in 0. 
Jastigiatum they are said to be few around the base of the spore- 
sac. The typical form of O. affine is described by Venturi as hav- 
ing an exserted oval cylindric capsule, the plants being yellowish 
green and laxly pulvinate, though in thé general description he 
- Says they may be yellow or dark green with capsules emergent 
or rarely almost immersed. Limpricht states that the cells of the 
leaf are thickened throughout in O. affine, though not in O. fastigi- 
atum, and Venturi claims that the apical cells of O. fastigiatum are 
hexagonal and rounded in O. affine. This would agree with Lim- 
Pricht’s observations on the thickening of the walls. 
eel FASTIGIATUM, Bruch; Brid. Bryol. Univ. 1. 795, 
1826. 
Sullivant and Lesquereux distributed as O. affine, in No. 182 
of the 2d Ed. of Musci Bor. Am. two markedly different speci- 
mens, collected by Agassiz around Lake. Superior, one tall and 
yellow with long cylindric exserted capsules, the other small and. 
black with immersed urceolate capsules; the latter have striolate 
and trabeculate teeth, the former has the teeth entire, not trabecu- 
late, and faintly striolate. Evidently then we have the same 
Problem here as they have in Europe, only our material is so 
Scant that we cannot satisfactorily determine whether the two 
Species intergrade or not. Agassiz and Macoun only, have col- 
lected around Lake Superior the specimens which agree with 0. 
Sastigiatum, and all other American specimens which I have seen 
seem to be O. affine. However, a comparison with descriptions 
of European specimens show that the main characters are con- 
Stant. 
