—55- 



Fig. 2. a. Median leaf cells of Cli»iaciu)ii dendroides x 250. b, Same of 

 C. Americanum x 250. c, Same of C. Kindbergii x 250. d, Two branch 

 leaves of C. KhidbcrL^ii x 10. 



Stem leaves scattering, ovate; branch leaves ovate-lanceolate, some- 

 what auriculate, less differentiated than in C. Americanum, clasping by 

 enlarged rounded basal angles, sulcate ; areolation nearly uniform; median 

 cells oblong-hexagonal, 2-3: i. Seta usually much longer and more flexu- 

 ous than in CAmericamnit. capsule about the same as in that species, 

 2-4 cm. long; teeth of peristome usually more or less perforate. 



ExsiccATi.— Austin Muse. Appal. 2S9: Ren. & Card. Muse. Am. Sept. 

 Exsic. 23S. 



The specimens of Sull & Lesq. Muse. Bor. Am. Ed. 2, 42. in the Colum- 

 bia College Herbarium are this variety as are also Drummond's Muse. Am. 

 (S. States) 120. 



A closer study of this form has convinced me that it is a good spe- 

 cies closely related to C. Americanum as occasional forms with the short 

 leaf cells and a dendroid habit or auriculate leaves are occasionally met 

 with. The typical form seems most abundant along the coast and in the 

 South, but in general this species has the range of C. Americanum, but is 

 much less frequent inland than that species. Aquatic forms of the other 

 two species may be confused with this. 



Usually distinguished at a glance by its color and habit of growth: 

 surely determined by the larger, proportionately broader branch leaves 

 without the conspicuous auricles of C. Americanum yet more auriculate 

 than C. dendroides, and specially by its very short leaf cells. 



►The distinguishing characteristics of each species are printed in italic. 

 **The heavy faced numerals indicate volume numbers and the numerals immediately 

 iollowing the semicolon indicate pages. 



