742 363. Didymodon. 14, MUSCI. » Pl. cell. fol. 
a. Capsules inclined. hiewsyyie a 
a: Didh ymodon purpureum. Purple twin-tooth. 
Stem scarcely branched ; leaves. lanceolate, pointed, 
keeled; edge turned over, ‘not cut; capsule ovate, 'cylin- 
drical, ‘oblique, with a slight tubercle, furrowed when “dry 5 
lid conical. 
Bryum perangusfis crebrioribus foliis » capitulis erectis, longiuscalis pe- 
diculis e surculis annotinis innascentibus, ’Dillen in Rati Syn. $32 4), 
Bryum Celsii, Lin. 8S. P. 1585; Dickson €rypt.3; 7. 
Mnium purpureum, Lin. S. P. 1575: 3 Wither. Arr. 802, 
Dicranum purpureum, Hedw. 8. Musc. 136; Eng ifs | dd 2262. 
Dicranum intermedium, Hedw. S. Musc. 138, 
Bryum bipartitum, Dickson Crypt.; Engl. Bot. 2357, 
Bryum strictum, Dickson Crypt. 4, 13. 
Bryum tenue, Dicicsan, Crypt. 3,8. 
Bryum papillosum, ‘Dickson Ceipt. 4, 12. 
Dicranum strictum, Engl. Bot. 2294... — 
Dicranum Celsii, Hedw. S. Muse. 149; Engl. Bot. 2118. 
Trichostomum papillosum, Engl. Bot. 2533. 
Red shanks. 
On moist banks. 
2. Didymodon inclinatum. Inclined twin=tooih. 
Leaves in two rows, awlshape, sheathing at. bottom ; cap- 
sule ovate, inclined; lid conical. 
Didymodon inclinatum, Swariz M, Suec, 28. 
Bryum inclinatum, Dickson ae 359. 
Swartzia inclinata, Hedw. Crypt. 2, 74. 
Cyuontodium inclinatum, Hedw. S. Musc. 58. 
Grimmia inclinata, Engl. Bot. 1824. 
On rocky mountains; perennial; summer. 
b. Capsules upright. 
3. Didymodon nervosum. Ribbed twin-tooth. 
Leaves reverse-ovate, main rib thickened above; tip 
short; capsules ovate, upright; lid beaked; beak short, 
Grimmia atrovirens, Eng!. Bot. 2015. 
On dry banks by the sea. 
Resembles weissia lanceolata, gen. 359; sp. 7. 
4. Didymodon flexifolium. °° Bent-leaf twin-tooth. 
Siem long; leaves oblong, ovate, bent, deeply serrated 
at the tip; capsules upright, cylindrical ; lid beaked. 
Bryum flexifolium, Dickson Crypts 3,5. . \ 
_ Prichostomum flexifolium, Engl. Bot. 2499, 
“On barren banks, or roofs. 
