50 BEYACE.E. [Archidium. 



costate ; areolation loose, uniform, hexagonal-rhomboidal, sliglitly 

 chlorophyllose. Flowers monoecious, gemmiform. Calyptra 

 very thin, irregularly lacerate. Capsule globose, sessile. SjDores 

 few, larger than in any other moss, ^ m.m. in diameter, smooth. 



1. A. Ohioense, Schimp. Monoecious: stems filiform: 

 leaves spreading, subulate by the excurrent costa, serrulate 

 above ; perichaetial leaves broadly lanceolate, narrowed into a 

 long point, costate : capsule globose, on short lateral branches : 

 spores 16 to 20, angular, smooth. — Bryol. Eur. Arch, 3 ; Sulliv. 

 Mosses of U. States, 14, and Icon. Muse. 16, t. 7 ; Sulliv. & 

 Lesq. Muse. Bor.-Am. Exsice. n. 28. A. phascoides, Sulliv. 

 Muse. Allegh. n. 213. 



Var. Donnellii. More robust, yellowish green : leaves thin, 

 subscarious; areolation less distinct: male flowers more gen- 

 erally terminal. — A. Donnellii^ Austin, Bull. Torr. Club, vi. 

 190. 



II/VB. Meadows and waste fields, Central Ohio and Northern Alabama. 

 The variety in Florida (./. JDonnell Smith). 



2. A. tenerrimum, Mitten. Differing from the last, espe- 

 cially in the hypogynous inflorescence, the antheridia being 

 placed in the axils of one or two small leaves at the base of the 

 perichoetial ones, as in the European A. phascoides, Brid.; the cells 

 of the areolation are much shorter, closer and firm. — Journ. 

 Linn. Soc. viii. 17. A. 2^hascoides, Drumm. Muse. Am. (Coll. 

 II.), n. 11. 



Hab. Louisiana (Drummond). 



3. A. Ravenelii, Aust. Synoecious : plants much divided 

 below : lower leaves distant, very small, ovate and appressed, 

 or larger and open, the upper closely imbricate-tufted or pressed 

 together in gemmules, ovate-lanceolate, distinctly acuminate or 

 acute or obtuse, very entire ; costa vanishing below the apex or 

 excurrent into a short point ; areolation very loose, round, oval 

 or rhomboidal, slightly longer and broader toward the base. — 

 Bull. Torr. Club, vi. 145. 



Hab. South Carolina (Bavenel); Florida {J. Donnell Smith). 



4. A. longifolium, Lesq. & James. Synoecious: cespitose, 

 sometimes in compact tufts, yellowish green ; stems short, 

 slender: leaves long and narrow, open, flexuous, narrowly 

 lanceolate-subulate; areolation in long quadrangular cells, be- 



