&A- 



On : 



• American forms of Char a c 



[May, 



the anterior shoria than t/u t'a teral, which about equal in length 

 the sporangium; the coronula consists of short thick cells with a 

 minute point, not at all developed as in Brannii tenera. Nucleus 

 425-500 /'. long, with 6-7 angles. 



We now come to a group of forms representing in a general 

 way the ordinary var. Schiveinitzii, though the transition from the 

 short bracted and small fruited forms to the large bracts and large 

 fruit, is gradual. The bracts subtending the sporangium vary in 

 relative length, sometimes the anterior, sometimes the lateral 

 bracts are longer. The form with long lateral bracts has been 

 known as Chara foliolosa Schw., the one with shorter bracts but 

 long leaves, as in Form in. as C. opaca Schw. 



v. Forma macrocarpa, meioptila, verticillata, tenuior, leiopy- 



rena. Plant small, diffuse, with elongated leaves of 4-5 articula- 

 tions ; bracts usually verticillate, equal in length to or slightly 

 longer than the sporangium, anterior bracts somewhat longer than 

 the lateral, posterior often nearly as long as the lateral, rarely 

 wanting. Sporangium with 9-1 1 whorls, coronula of divergent 

 cells with rather long points, similar to Brannii tenera of New 

 Mexico (Forma 1). Nucleus 640 //. long with 9-1 1 slightly 

 prominent ribs. Saranac lake, N. Y., 1881. 



In previous years Professor C. H. Peck, of Albany, collected 

 specimens from precisely the same locality, and in i860 I sent 

 specimens to Professor A. Braun, who recognized it as a transi- 

 tion form between var. Brannii and var. 



