1879.] 181 (Halsted. 
mucronate cells; bracts longer on upper side, at fertile joints as long 
as sporangium. Antheridia large, .25-.30 mm. in diameter, bright 
orange. Sporangia long and narrow when young, crown large and 
spreading, oval and black when mature. 
This is one of the largest species of Chara, and is of special in- 
terest as being the only American species without cortication. 
In Herb. Gray a fragmentary specimen from Oregon (E. Hall) and 
another, in a more perfect state from Hillsborough. N. C., represent 
the species. We have found it abundant at Jamaica Plain, and it 
grows in other localities near Boston. 
On account of its large size and freedom from corticating cells this 
species is favorable for the study of the circulation of protoplasm. 
Var. Schweinitzii A. Br. 
Plants rather small, not exceeding a foot in length, pale green ; 
whorls of leaves numerous, forming a dense spike at the end of the 
branch; leaves broad. 
This is strictly an American form. A foreign variety, C. Braunit, 
which appears to be quite common in Europe, is much like our 
variety. J. Wallman considers them the same in his “ Famille des 
Characees”’ p. 49. 
The variety is a common and constant one with us. In Herb. 
Gray, it is represented by Nos. 10, 11,13 and 15 of C. Wright’s New 
Mexico collection; the West is represented by members from 
Oregon, (E. Hall). An old specimen from the herbarium of J. Gay 
was collected in Pennsylvania, in 1837. Brattleboro, Vt. (Frost); 
Salem, Mass. (Robinson); Appanaug Pond, R. I, and Uxbridge, 
Mass. (Dr. Robbins). The finest of all the specimens as regards size, 
color and abundance of fruit were from Wood’s Holl (Dr. Farlow) 
where it grows in shallow ponds. On these latter specimens well 
developed bulblets were found, thus adding this species to the list 
of those which reproduce by that method. 
Chara crinita Wallr. 
Chara crinita Wallr. Agardh. Syst. Alg., 126; A. Braun, in Flora, 
1835, 1, 70; Kiitz., Phye. Germ., 259; Sp. Alg., 525; Wallman, Char., 
91; A. Braun, in Krypt. Fl. Schlesien. 
Exsiccatae: Braun, Raben. and Stiz., Char. Exsic., 6, 65, 66, 67, 
68 and 69. 
Plants diecious, one to two feet in length, incrusted with lime; 
stem .68-.80 mm. broad, spines very numerous, mostly in rosettes, stip- 
ular ring double, large, corticating cells same number as leaves; whorls 
