— 126 — 
either large or not well-defined. Stem not plumiform, 
irregularly divided. Dioecious or r. monoecious. "1d 
VII.. Cupressina. Leaves not spreading when dry, mos 
small (in few species large) not r. denticulate and circinns 
not (exe. H. plicatile and H. crista castrensis) plicate; alar ce 
gen. distinct r. large. Stem often pinnate. Sometimes monoe — 
cious. i 
a. Leaves (at least the elder of stem) yellow (r. red 
brown) at insertion, gen, small, in Imponentiformia somewhat 
large. T 
aa. Leaves recurved nearly to acumen, often circinnate 
l. Plicatilia. Leaves plicate. Stem eradiculose often ir 
gularly divided; paraphyllia none. Capsule long narrow; 
long. Dioecious very r. fruiting. 
2. Reptiliformia. Leaves not plicate. Stem us. cree 
and pinnate; paraphyllia r. (in H. canariense) present. Capst 
not long; pedicel shortish. Monoecious us. fruiting. a 
bb. Leaves not distinctly recurved and not plicate. Di 
cious or monoecious, E 
3. Imponentiformia. Leaves somewhat large often circinnate. 
Stem pinnate us. with paraphyllia. Habit of H. cupressif rm 
4. Calliehroidea. Leaves small circinnate. Stem often 
miform r. with paraphyllia. ai 
5. Raphidostegioidea. Leaves small not circinnate. Ste 
not regularly pinnate; paraphyllia none. 
b. Leaves pale at insertion, often (princ. in Cupressiformia)l 
aa. Leaves circinnate. Paraphyllia sometimes numerous. 
6. Molluscoidea. Leaves not recurved sometimes large. Stem 
us. plumiform gen. not or sparingly radiculose,  Dioecious. r 
7. Hamulosa. Leaves small sometimes recurved. Stem n 
plumiform, us. creeping; paraphyllia us. broad. Us. monoeck 
bb. Leaves not circinnate. Stem not plumiform; paraphy 
few or wanting. i 
8. Cupressiformia. Leaves short-acuminate often large, 80! 
times recurved. Stem sometimes pinnate. Dioecious. ^ 
9. Amblystegioidea. Leaves small long-acuminate not recu 
ved. Stem irregularly divided or subpinnate. Monoecious. 
l. Alaria C. Mueller meer. 
A. Leaves distant decurrent, more denticulate at base; a a 
cells large. 
1.H.commutatum Hedwig. 1 
Leaves from broad-ovate base long-acuminate, gen. stri 
