Halsted.] 176 [March 5, 
translucens A. Braun, in Flora, 1835, 1, 50; Babington, Man. Eng. — 
Bot., 420. 
Exsiccatae: Braun, Raben. and Stiz., Char. Exsic., 19. 
Illustrations: Engl. Bot., xxvi1, Tab. 1855; Reichenb. Iconog., 
1x, Tab. 804-805; Coss. and Germ., Atlas, Tab. 40, B; Kiitz.,: 
Tabulae Phycol., vir1, Tab. 26, 1. 
Plants moneecious, large, bright shining green; sterile whorls large, 
composed of numerous, broad, single-celled leaves ; fertile whorls small 
and near the tips of the branches. Antheridia situated near the 
apex of the leaves. Sporangia small, ovoid, aggregated, 5-7-striate; 
crown small, .05-.07 mm. broad. 
This is one of the largest and most showy of the Nitellae. When 
dried its shiny green color is in contrast with the dull appearance of 
most of the other species. Nordstedt and Wahlstedt’s single speci- 
men is of the elongated form, as is also the one in Braun, Raben. aad 
Stiz. Exsiccatae. 
In Herb. Gray are specimens marked ‘‘ Flora Texana, F. Lind- 
heimer, Seg. (461). — 4-6 feet long on bottom of deep clear ponds in 
deep shady woods near Guadaloupe, Aug. 1847.” ‘These plants are 
sterile. Specimens from western Texas (C. Wright, No. 1) are 
the same in all respects. Some of Bolander’s Californian specimens 
bear fruit sparingly at the ends of the branches, while others fruit in 
all the numerous branches. Specimens from the San Francisco 
water-works are like the last though not so fertile. Specimens 
from Brattleboro, Vt. (Frost), are the only ones seen from the East- 
ern States. It is probably not so common here as through the South 
and West. . 
Nitella gracilis (Sm.) Ag. 
Nitella gracilis (Sm.) Agardh, Syst. Alg., 125; Kiitz., Sp. Alg., 
515; Wallman, Char., 17; A. Braun, Schweiz. Char., 10; Coss. and 
Germ., Fl. Env. Par., 683; A. Braun, in Krypt. Fl. Schlesien, 399. 
Chara gracilis, Smith, Enel. Bot., Tab. 2140; A. Braun in Flora, 
1835, 102. ret, 
Exsiccatae: Braun, Raben. and Stiz., Char. Exsic., 24, 25,57 and 58. 
Illustrations: Engl. Bot. Tab., 2140; Reichenb. Iconog., vu, 
Tab., 782; Coss. and Germ., Atlas Tab., 40, E. 1 and 2; Kiitz., Tab- 
ulae Phycol., vir, Tab. 34, 1. 
Plants monecious, slender, bright green; whorls loose; leaves re- 
peatedly 3-4 times divided, ultimate divisions two to three; ultimate 
segments long, apical -cell conical, mucronate. Sporangia globose, 
4-5 striate, bands indistinct; crown often deciduous. 
