20 1COXES MUSCORUM. 



ASTOMUM SULLIVANTII, (Schimp.) Hampe. 



Tab. 11. 



Differt ab A. crispo cui simillimum, habitu humiliore, capsu- 

 lasque nitiduke longius rostellatae cellulis perbelle aurantiaceis. 



Astomum Sullivantii, Schimp. Brvol. Europ. 



Phascdm crispum, Sulliv. Muse. Alleghan. No. 211, ex parte. 



Hab. Waste fields, roadsides, &c. — Common. 



The bright orange-colored cells of the capsnle-wall furnish 

 the main distinctive mark of this species. In other respects, it 

 is scarcely to be separated from A. crispum, with which it is 

 often found growing, as also with another very nearly related 

 species, A. nitidulum, Schimp. 1. c. The last is a smaller species 

 than A. Sullivantii, and has an ovoid chestnut-colored, glossy 

 capsule, obliquely rostellate, with a much longer pedicel and a 

 smaller calyptra. In the two last-named species, as in A. 

 crispum and A. Ludovicianum, a feeble operculation prevails, 

 their fully matured capsules under slight pressure dehiscing by 

 a circumscissile line near the apex ; hence an operculated genus, 

 Systegium, has recently and very properly been established for 

 these species by Professor Schimper. 



TAB. 11. — Astomum Sullivantii. 



1. Plantse naturali magnitudine. 11, 12,13,14. Capsular. 



2. Planta fructifera. 15. Capsula verticaliter secta. 



8. Eadem defoliata cum fl. masc. 1G. Capsula calyptrata cum foliis 

 4, 5, G. Folia comalia. periohaetialibus. 



7. Par- folii. 17, 18. Calyptra?. 



- Rete folii baseos. 19. Spora. 



9, l'». Sectiones trans, folii. 20. Flos masculus. 



