APHANORHEGMA SERRATUM, Sulliv.
Tab. 57.
Plantæ lmmiles, teneræ, annuæ vel bi-triennes, gregariæ, vel cæspitulos laxos pallide viresccntes formantcs, basi sola radiculosæ.
Caulis erectus, 3–7 lineas attingens, primo simplex, dein bis terve dichotome innovando-ramosus.
Folia mollia, inferiore in caule elongato remota, flexuosopatula; superiora approximata, erectiuscula, oblongo-et spatbulato-lanceolata, brevius acuminata, supra medium serrata, ad apicem usque tenui-costata, laxe bexagono-areolata; cellulis basilaribus majoribus oblongis rectangulis, marginalibus sæpe luteo tinctis.
Flores monoici et synoici: antberidiis 6–12 fasciculatis nudis vel uno alterove folio perigoniali minimo comitatis in comalium axillis rarius ad vaginulas basin positis; parapbysibus longioribus apice maxime globoso-inflatis.
Capsula immersa, brevissime pedicellata, spbaerica, vertice minute papillata, in medio rima baud discolore valcle obscura circumcisse debiscens; calyptra conico-mitrasformi 5–6-lobata vix ad operculi medium porrecta; sporis tuberculatis.
Aphanorhegma serratum, Sulliv. in Mem. Amer. Acad. n. ser. 4, p. 60, t. 2; Mosses U. States, p. 52, t. 4; Sulliv. & Lesqx. Musc. Bor.-Amer. Exsicc. (ed. 1), No. 154.
Schistidium serratum, Hook. & Wils. in Drumm. Musc. Amer. Coll. 2, No. 20; Sulliv. Musc. Alleghan. No. 198.
Physcomitrium serratum, C. Müll. Synop. Muse. 2, p. 545.
Hab. Damp ground, river-banks, sliaded roadsides, &c., New Jersey, Pennsylvania, and Western Missouri.—Not uncommon.
