78 Wisconsin Academy of Sciences , Arts and Letters. 
ii. Leaves firm, plants very large, mostly 1-2-pinnate, erect or ascending „. 
■* Paraphyllia 0. 
Leaves obtuse or abruptly apiculate. 
Capsule smooth when dry. 
Leaves obtuse. 
Olive or grayish green, 1 — 2- pinnate, leaves open H. Selireberi, 178. 
Dirty green to dark brown, almost simple, leaves 
closely appressed.H. trifarium, 181. 
Leaves abruptly apiculate, plants pale green . H. pur tun, L. 1 . 
Capsule plicate when dry, plants dark green to reddish 
brown.H. scorpioides, 184. 
Capsule unknown; plants dark yellow and greenish, branches 
julaceous, few, fastigiate, leaves short apiculate H. turgescens, 182. 
Leaves long acuminate. 
Sulcate. 
Apex blunt .H. Flemmingii, 191. 
Apex very sharp. 
Ecostate, leaf cells all alike.H. loreum, 192. 
Bicostate, leaf cells enlarged at base . . H. triquetrum, 190. 
Not sulcate.It. squarrosum, 189. 
* * Paraphyllia, present. 
Leaves with long double costa, leaves deeply sulcate H. umbra turn, 186. 
Leaves obscurely bicostate. 
Obtuse.H. Alaskanum, 179. 
Acute or apiculate or long acuminate. 
Paraphyllia pinnate, branches densely 2—8 pinnate H. splendens, 185.. 
Paraphyllia minute, branching irregularly pinnate H. brevirostre, 188. 
Leaves unicostate to middle, coarsely serrate . . H. Oakesii, 187. 
\ 
II. Leaves secund. 
[Rapliidostegium spp. and Brachytliecium Tliedenii may be sought here.] 
A. Costa single, reaching to the middle or beyond. 
1. Cells short, minute .H. crispifolium, 22.. 
2. Cells elongated. 
a. Seta rough. 
Leaves serrulate . .H. Yelutinum, 45. 
Leaves entire.H. pluiuosum, var. 58. 
1 Renauld and Cardot: FI. Miq. 57. 
