Name: Atrichum angustatum
| Family: Polytrichaceae |
Collection Date:- 10-12-2011
Habitat: on damp area next to a stream
Location: Field Station
Description: Medium sized green plants, grow on soil
Collector: Getachew Hatsey
Key Used: Conard, H.S. and P.L. Redfearn, Jr. 1979. How to Know the Mosses and Liverworts 2nd Edition, McGraw-Hill, Boston, Mass.
1a. Plants with stems and leaves; leaves equally spaced around the stem or, if in two opposite rows, leaf cells enlongate or isodiametric and rhizoids multicellular; sporophyte persisting for weeks or months with no elaters present in the capsule. Class III MUSCL…2
2b. Plants not as above….3
3b. Plants not as above…(p.28) Subclass 3 Bryidae
Bryidae
1b. Green, brown, yellow, or blackish plant; if empty cells occur, they are not in two or three layers or they occur at the base, apex, or margin of leaf…..3
3b. Leaves inserted in three or more rows though plants sometimes strongly flatten thus appearing into rows….7
7b. Plants with peristome of more than four teeth or the peristome absent; gemmae when present at the tips of sterile stems not arrange in a cup…8
8b. Leaves well developed and persistant…9
9b. Capsule and leaves not as above….10
10b. Plants with or without a distinct stem; capsule when present with an operculum or regularly dehiscing near middle; may or may not be a ephemeral…17
17b. Plants minute to large; capsule immersed to exerted; if plants minute with immersed capsule, growing on rocks, trees or soil and not ephemeral…20
20b. Leaves without such out-growths; sometimes with deciduous gemmae….28
28b. Plants not having the above combinations of characters; peristome when present single or double, composed of teeth formed by strips of cell wall split apart through the cell cavity; growing on various substrates but not restricted to reach organic soil, bones, or other organic matter….33
33a. Stems erect, unbranched, or with branches erect, generally in tufts; archegonia and sporophytes terminal….34
34b. Leaves, especially the bases, not as above….36
36b. leaf cells smooth…….83
83b. Plants growing on soil, rocks, or tress but not forming long creeping stems with erect, branches densely leafy…….85
85b. larger mosses, stems usually 4mm or more tall, if minute, with persistent protonema……..91
91b. leaves in five ranks; stems not as above…………..92
92b. leaves 1-5 times as long as broad…….111
111b. leaves bright to dark green……..115
115b. upper leaf cells quadrate, hexagonal, rhombic, or short-rectangular, 6 times or lass as long as wide…….118
118b. upper leaf cells hexagonal, rhombic or short-rectangular, larger…………125
125b. Marginal cells slender, fusiform, not similar to cells of lamina…………126
126a. Capsule erect, peristome single, composed of 32 teeth………………..127
127a. leaves oval-oblong or oblong-lanceolate; margins serrate; costa bearing a few short obsolete; lamella; peristome composed of 32 stout teeth attached to a transverse membrane, each tooth made up of cells…..(pg. 223) Atrichum
1a. upper leaf cells averaging 12-17 µ in longest dimention; leaves narrow, those near the middle of the stem usually leass than 1mm wide, often with 6 or more lamellae covering 1/3 of leaf near middle…………………..Atrichum angustatum
Atrichum angustatum
"Plants medium to-sized, 10-20mm high, in loose, dull, dark green tufts, on sandy soil, Manitoba to Newfoundland south the Gulf States."
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