The English flora - SeaweedAfrica

2* MUSCI.
Synopsis of the Genera.
Sect. I. Seta (orfruitstalk) terminal. (Dicranum only offers
a few exceptions.} Acrocarpi.
Subsect. I. Lid adhering to the mouth of the capsule, which is
destitute ofperistome. Astomi.
1. Andrea. Capsule 4-valved.
2. Phascum. Capsule entire.
Subsect. II. Lid deciduous; mouth of the capsule naked.
Gymnostomi.
3. Sphagnum. Capsule sessile on a soft pedunculated recep-
tacle which resembles a fruitstalk. Calyptra irregularly torn.
4. CEdopodium. Seta elongated, thick, fleshy. Calyptra
dimidiato-mitriform.
5. Gymnostomum. Seta more or less elongated, slender,
rigid. Calyptra dimidiate.
6. Anictangium. Seta more or less elongated. Calyptra
mitriform.
7. Schistostega. Seta elongated. Lid very thick, marked
with radiating cells. Calyptra campanulate, at length cleft.
Subsect. III. Lid deciduous ; mouthofthe capsule furnished with
a peristome. Peristomi.
Div. I. Peristome single. Aploperistomi.
8. Diphyscium. Peristome a cone-shaped, plaited membrane.
Capsule oblique.
9. Tetraphis. Peristome of 4 teeth.
10. Splachnum. Peristome of 8 or 16 geminating teeth.
Capside with an evident apophysis.
11. Cyrtodon. Peristome of 16, equidistant, entire teeth,
marked with a central line, incurved when dry. Capsule witli
an apophysis. Calyptra glabrous, without furrows.
12. Conostomum. Peristome of 16, equidistant teeth, united
at their summits.
13. Encalypta. Peristome of 16 teeth. Calyptra campa-
nulate, smooth, entirely enclosing the mature capsule.
14. Weissia. Peristoma of 16, entire, equidistant teeth.
Calyptra dimidiate.
15. Grimmia. Peristome of 16, entire or perforated, rarely
cleft, equidistant teeth. Calyptra mitriform.