— 215 — 
E pedicel straight yellowish. Resembling small forms of B. acuta 
in habit. — Alp. rocks r. Eur. Norway! Scotl.: Hunt. 
Fam. 23. Grimmiacee. 
102. Grimmia Ehrhart. 
A. Leaves spirally twisted about stem when dry. 
I. Streptophyllum. Leaf-cells more or less sinuous. Capsule 
 €xserted smooth; pedicel longer, us. deflexed; lid not systylic; 
peristome présent. Dioecious r. fruiting. 
— B. Leaves not spirally twisted. 
IL Eu-Grimmia. Leaf-cells not distinctly sinuous. Capsule 
shorter than the gen. exserted pedicel; lid not systylic; peri- 
stome present. 
a. Leaves smooth obtusate entire and not sheathing, appressed 
when dry and not patent when moist; cells large; hairpoint 
very short or wanting.  Dioecious. 
1. Molliformes. Leaves large. Tufts gen. loose. Stem 
elongate, 
. . 2. Velutinz. Leaves very small, Tufts compact pulvinate 
very low. 
= M. Leaves smooth or (in G. cespiticia) papillose, us. acu- 
minate, patent when moist; cells small; hairpoint often long. 
. Often monoecious. Tufts us. pulvinate. 
8. Pulvinatz. Leaves gradually narrowed or obtuse, not 
i sheathing; cells us. short. Capsule often striate; pedicel often 
: curved. 
. 4. Alpestriformes. Leaves abruptly narrowed from half- 
. sheathing base; basal cells often long. Capsule not striate; 
pedicel r. curved. 
. €, Leaves papillose crenulate, appressed when dry; cells 
 .&. Andresmoides. Capsules unknown. 
Pseudo-Racomitrium. Leaves ovate-lanceolate or subli- 
Rear cells (princ. the upper basal) sinuous, the inner basal 
. Rarrow-linear. Capsule as in Eu-Grimmia. 
. & Leaves carinate above, often recurved below. 
aa. Leaves (princ. the younger) papillose. Dioecious. 
. L- Papilloss. Leaves not crisped but often nearly appressed 
= When dry. Pedicel of capsule arcuate. 
. hb. Leaves smooth. Often monoecious. Cnn 
 .2. Crispulee. Leaves very narrow sublinear us. crisp 
. Pedieel of capsule arcuate or straight. Dioecious very r. fruiting. 
