Halsted.] 17 8 [March 5, 
This is the smallest American species which we have seen. JN. 
batrachosperma, a somewhat smaller species according to Mr. Allen,1 
has been found in this country. 
The single specimen of Braun, Raben. and Stiz. Exsic, as also the 
one in Nordstedt and Wahlstedt’s collection are identical with our 
own, and, as far as we know, the species is a very constant one. The 
only striking variation from the type is in Reichenbach’s illustrations 
in which 791 represents the normal form and 792 ‘‘ var. major” 
This latter corresponds so nearly to specimens and figures of JV. 
batrachosperma that it may be that species. 
Specimens in Herb. Gray are from Michigan (Dr. Cooley); Rhode 
Island (Dr. Robbins). Mr. Allen states that this species has been 
found at Peekskill, New York. The small size and obscure habit of 
the plant may account in a measure for the limited number of known 
localities. ; 
Nitella (Tolypella) intricata (Roth.) Ag. 
Nitella (Tolypelia) itricata (Roth.) Agardh, Syst. Alg., 122; 
A. Braun, in Krypt. Fl. Schlesien, 400. Nitella fasiculata A. 
Braun, Schweiz. Char., 11; Kiitz., ‘Sp. Ale.) 517! Nitella 
polysperma A. Br.; Kiitz., Phye. Germ., 255; Wallman, Char., 
34. Chara intricata Roth. Catal., 11, 125. Chara polysperma 
A. Braun, in Flora, 1835, 1, 56. 
Exsiccatae: Braun, Balhae and Stiz., Char. Exsic., 8 ind 33. 
Lillustration: Kiutz., Tabulae Phycol vi, Tab. 36, 
Plants monecious, large; whorls numerous, very large, consisting of 
8-10 leaves; leaves repeatedly twice to thrice divided, flabeillate, 
dull green, apex two-celled, mucronate. Sporangia oval, somewhat 
beaked, .40-.55 mm. long, 7-8 striate, on short contracted whorls 
near the tips of the branches. 
This species is one which is quite readily distinguished by its large 
wide spreading whorls of much branched dull green leaves. 
Since Tolypella was established as a genus, this species has been 
generally called Tolypella intricata A. Br. Our specimens agree 
with those of Braun, Raben. and Stiz., Exsic. and Nordstedt and 
Wabhlstedt; but we find the antheridia to be terminal. This fact is 
perfectly evident when the organs are examined in the young state. 
Usually a number of sporangia are produced at a forking, and as 
they increase in size, the antheridum, as it becomes old, is pushed 
out and made to assume a somewhat lateral position. 
1 Torrey Bulletin, 11, 3 (1871). 
