﻿of North America. 11 



larly lacerate at mouth : capsule dull straw-colored, erect or a 

 little curved, 3.3-6 (mostly 4-4-5) X -32--5 6 mm -> sulcate and com- 

 pressed-quadrangular when dry, with acute or slightly winged 

 angles, usually rather abruptly contracted below to a short pedicel, 

 thick-walled, crowded with spores at maturity, marked with a nar- 

 row yellow suture on either side but long indehiscent, stomata 

 large, the guard-cells yellowish ; columella very slender and incon- 

 spicuous; spores yellow, the convex face with 20-35 wart-like 

 papillae, the other faces faintly punctate near the middle, 44-5 8 /' 

 in maximum diameter ; pseudo-elaters of short, irregular, mostly 

 unicellular fragments, often as broad as long, the walls unequally 



thickened. 



Hep 



"On moist earth" and "in wet meadows." Silverton and 

 Salem, Oregon (E. Hall); Seattle, Washington (C. V. Piper). 



The fertile plant from Silverton (E. Hall, no. 26), which is first 

 cited after Austin's diagnosis, should undoubtedly be considered 

 the type of the species. This is preserved both in Herb. Pearson 

 and in the Herbarium of the Owens College of Manchester, Eng- 

 land. Its capsules are rather immature, as observed by Mr. 



Austi 

 Aust. 



fc> 



represented by good specimens, 



Hallii 



herbaria named above. It is quite probable that the sterile plants 

 from Oregon, also placed with A. Hallii by Austin and from 

 which the original'description was, doubtless, in part drawn, be- 

 long with Ajithoceivs Pearsoni, which has a somewhat larger thallus 

 and a wholly different sporophyte, though in the absence of the 

 latter phase it would perhaps be rash to assume to identify them 

 positively. Anthoceros Hallii is very distinct— in the fertile condi- 



tion, at least 



Ameri 



The mature capsules are filled with ripened spores far below 

 the mouth of the involucre, yet in only a few cases have we seen 

 indications of dehiscence, which takes place— rather imperfectly, 

 it may be— between two rows of narrow, yellow, thick-walled 

 cells. Some of the dark algal colonies in the thallus are com- 

 posed of detached cells 10-15 a in diameter, consisting of a spher- 

 ical, highly refractive centre surrounded by a thick, shriveled 

 membrane. These appear to be resting spores derived from deli- 

 cate inconspicuous filaments belonging to the Nostochineae, but 



