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728 357. Grimmia. 14. MUSCI. Pl.ceU.foL
7. Grimmia Donnii. Donnas grimm.
Stem short ; leaves lanceolate, awlshape ; points long,
transparent, hairlike; edge turned in; pedicells long, straight;
capsule ovate ; teeth of the peristome entire ; lid beaked
leak short.
Grimmia Donniana, Engl. Bot. 1239.
Grimmia sudetica ? Schweegr. Suppl. 24.
On rocks, in alpine regions.
XVI. 358. PTERIGONIUM. Swartz. Wmg-moss.
Capsule valveless, pedicelled ; pedicells from the side of
the stem; peristome single, toothed; teeth 16, not cut,
equidistant; CQ/^/p^ra halved.
1. Pterigonium Smithii, Smithes wi7ig-moss.
Stem much branched; branches pinnate; leaves tongueshape,
blunt, not cut, crisp when dry ; edge turned over,
main rib reaching more than half way up ; pedicells very
short ; lid beaked.
Pterogonium Smithii, Swartz in Schrad. Jour, 2, 173; Engl. iiot. 1326.
Hypnum Smithii, Dickson Crypt. 2, 10.
Polytrichum Smithii, Hull. Engl. Ft. 249,
On the trunks of trees ; perennial ; spring.
2. Pterogonium gracile. Slender wiyig-moss.
Branches in bundles, bent; leaves broad, ovate, pointed,
concave ; edge flat ; tip serrated ; base slightly 2-ribbed
lid conical.
Hypnum gracile ornithopodioides, Dillen. Muse. 320.
Hypnum gracile, Lin. Mant. 310.
Hypnum ornithopodioides, Huds. Angl. 508.
Pterogonium gracile, Swartz M. Suec. 26 ; Engl. Bot. 1085.
Pterigynandrum gracile, Hedw. Sp. 3Iusc. SO,
Encalypta gracilis, Roth Germ. 3, 154.
Grimmia ornithopodioides, Mohr.
On subalpine rocks.
3. Pterogonium filiforme. Threadlike iving-moss.
Stem irregularly branched, bent; leaves ovate, rather
pointed, concave; edges turned over, serrate; main rib
single or forked, short, faintly marked; lid conical.
Hypnum cylindricum, Dickson Crypt. 2, 12.
Pterogynandrum filiforme, Hedw. Crypt. 4,7.
Pterogonium filiforme, Engl. Bot. 2297.
Pterogonium csespifosum, Engl. Bot. 2526.
Grimmia filiforrais, Mohr.
On mountains.