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Pl.ceU.fol. 14. MUSCI. 363. Didymodbn. 743
5. Didyinodon rigldulum. Stiffish twin- tooth.
Leaves -closely tiledlike on all sides, lanceolate, very
pointed, keeled; main rib stiff, ranning be3^ond the point;
capsules oblong, ovate, upright ; lid beaked.
Didymodon rigitliilum, Hedw. S. Muse. 104.
• Bryum rigiduluin, D/cfcson Cc^p^ 4, 12. '''•'./..
Tricliostoinum ri2;iduliim, Turner M. Hib. 34 ;r.f^fff.f -Bof. 21TS.
Bryimi lineare, Dickson Crypt. 3, 6. ., ,!
Trichostnmum lineare, Engl. But, 1598.*'
On rocks and walls; perennial; April.
Very similar to tortula fallax, gen. 355, sp. 8.
t. ''a fi'
6. Didymodon trifariwn. Three-rowed twin-ioQih.
Leaves rather distant, somewhat three-rowed, lanceolate,
bluntish, keeled; main rib scarcely reaching the tip ; ^coji^-
5?^/e oblong, ovate, upright; /zVi beaked. ,
Didymodon trifarium, Sic«r/s Jlf. Swec. 28.
Cynontodium trifarium, Hedw, S. Muse. 57.
;;i,tWOUi \
Swartzia trifaria, Hedw. Crypt.2 1CK
X,^.,^^^\^^i^t.^ ji'.
Bvyum trnarium, Dickson Crypt. 3,0. a ,
Trichostomum trifarium, Engt. Dot. 1107. ' " -
*"
Tricliostomum linoides, Engl. Dot. 2295, not of Bicls5Hn»:
On moist banks.
7. Didymodon capillaceum. Hcriry twin-tooth.
Stem long; leaves nearly 2-rowed, awlshape, bristlelike;
capsule upright, ovate, cylindrical; lid conical.
Cynontodium capillaceum, Hediv. S. Miisc. 57.
Swartzia capiUacea, Hedw. Crypt. 2, 72. ,
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;„Vft«*< .fi-rir.r*!.
Didymodon capillaceum, Schrad. Germ. 64,.,.-.
,;;^Ti' '
Hryixm ^st'ivum, Hudson ^Ingl. 485.
, i i r^v
On mountam Danks.
S. Didymodon heteromallum. Odd-sided tivin-toolL
Stem rather short; leaves mostly facing one way, .awlshape;
capsule ovate, cylindrical; Ud conicahr-^if-fjo^^ ^*^^'^*
Grimmia heteromalla, Roth Germ. 3, 145 ;
Weissia heteromalla, Hedw. S. Muse. 71.
Afzelia heferomalla, Ehrh. Crypt. 173.
Eryum Weissia, D/cfcvon C/,i/;j^ 2, 5.
Didymodon heteromalluni, Hedw. S, Muse. 23. '
Engl. Boi. 1899.
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