30 Illinois State Laboratory of Natural History. 



fuscous-black, strongly muricate. (Riccia Curtisii, in Herb. 

 James, Cryptocarpus Curtisii Aust. ) 



Hab. Moist ground, N. C, (Curtis), S. C. (Ravenel). 



Bib. Pro. Phil. Acad. 1869, p. 231, Torrey Bull. VI, p. 21, 305. 



III. SPH-ffiROOARPUS MICH. 



Fruit aggregated in the thallus. Involucre sessile, obtusely 

 conic or pyriform, perforated at the apex, continuous at the 

 thallus, 1-fruited. Calyptra crowned with a deciduous style, 

 closely investing the globose capsule. Capsule indehiscent. 

 Spores globose, muriculate, remaining united in a coccus. An- 

 theridia in folliculose bodies on the surface of separate thalli. 

 Thallus ecostate, epidermis not distinct. Name from GT. 

 sphairos, a sphere, and karpos, fruit. 



1. S. Micheli Bell. Thallus orbicular, 0.61.3 cm. in 

 diameter, lobed, the lobes entirely concealed by the aggregated, 

 inflated involucres; involucres about 1.5 mm. long, three to 

 four times the length of the capsule, obtuse or subtruncate; 

 coccus 0.102 0.127 mm. in diameter, indistinctly lobed. (S. 

 terrestris Mich., Targionia sphcerocarpa Dicks.) 



Var. Oalifornicus Aust. Thallus substipitate, deeply 

 lobed; lobes often leaf -like; involucre oblong or subcylindric, 

 slightly acuminate. (S. Calif or nicus, Aust., S. Berterii, Aust. 

 not of Mont.) 



Hab. Cultivated fields, S. C. (Eu.) The variety in Cal. 



Bib. Syn. Hep. p. 595, Hep. Europ. p. 164. 



Delin. Liridenberg Monog. Hie. t. XXXVI. 



Exsic. Hep. Bor.-Amer. No. 138. 



2. S. Texanus Aust. Thallus smaller, its lobes very 

 slightly acuminate; involucre less obtuse at apex; spores about 

 one-half as large as in S. Micheli, coccus 0.063 mm. in diameter. 



Hab. Texas ( Wright, 1849.} 

 Bib. Torrey Bull. VI, p. 158. 



3. S. Donnellii Aust. Male thallus narrow, amber brown, 

 with stipe-like base; lobes spike-like; female thallus with sub- 

 stipitate base and leaf -like lobes; coccus deeply lobed 0.145 

 0.170 mm. in diameter; spores strongly tuberculate, 0.078 

 0.101 mm. in diameter. 



Hab. Gardens, etc. Fla (/. Donnell Smith). 

 Bib. Torrey Bull. VI, p. 157. 



