THE FLOBA OF NTEBBASE L 



ments in fruiting verticels 900 p long, 



(i long, 80 it wide, tertiary segm mts l I 5 mm 



sharp, cuspidate cell as in the spec ts in the sp 



The plant found here Lsvery much smaller than any described fori 

 translucens. The general Bize and li.tt.it is thai ol N ' 

 Coss. & Germ, form, minor A. Bb., bul the spore-ofa 

 structure of the mucronato colls of the Leaves show undoubted connec- 

 tion with X. translucens. 



PL XXIX., Fig. 8, branch with fruiting rertioel >, end-oella 



let x350. 



[Tolypella has the general habit of Nitella, from which it may be distin- 

 guished bythe following characters: Leaves with 2 -:; a >des bearing prlmarj 

 leaflets, always monoecious, antherids lateral, often with Long basal oeU, 



carpogonos clustered. No species of the genus have asyel i q oba >n 



Nebraska, but from the reported distribution of several of them it ■- 

 likely that some will bo found.] 



Family.— CHAREAE. 



Crown of the carpogone made up of five cells; stems and Leaves with <>r withoul crti 

 cation; stipules at the base of the leaf-whorls, more or Less developed, one celled; 

 6 15 ina whorl; carpogones and antherids on the upper sides of the Leaves, spore usually 



coated with a calcareous layer. 



The family contains four genera, of which only ouo is heir represenl 



1. CHARA L. Sp. PL 1156. 1753. 



The characters of the family. 

 Etymology: Greek x a P a , joy. 



Chara coronata Ziz. in A. Br. Alg. Bot, Zeit. i. 59. L835 



Plants usually large, from a few centimeters to a meter long, short forms 

 usually much branched with firm, broad stems and Leaves, 1 L5 nun ; Inn..' 

 forms with cells less firm and narrower, no cortication, stipules at the 

 base of the leaves forming a simple whorl; Leaves Long, 3 1" .-.•IK .•inline 

 in a crown of 3 5 mucronate cells; monoecious, c irpog >nes and antherids 

 produced usually at all the nodes of the leaves, antherids variable, 

 300 /t in diam., carpogones variable, crown Large, oells rather Long, usually 

 spreading, sometimes connivent; spore \5 I 560 . black, braota extremely 

 variable, from very much shorter than the carpogone to three timi 

 long — quite variable on the same plant 



Common all over the state. 



The specimens collected at York in 1893 by Miss Hopper are long, Blender 

 plants, spores 150-501x270-306 u, bracts very short, 3 5 times as 1"' 

 wide, acuminate, leaves 3-6 celled PL XXX.,Fig L, pari of plant natural 

 size; Fig. -4, carpogone s50. The speoimens In the herbarium of the 

 Botanical Survey from Cherry county and from Greenwood are i 

 and more branched; nucleus (Greenwood speoimi 

 bracts 1-3 times as lone as the carpogone; (Cherry county speoim 

 540-556x300 320 u, bracts aboul equal to the carpog 



PL XXX., Fig. 2, part of plant, natural ao Le with o irp tgones 



Fig. 5, young carpogones and antherids \~" m with bat 



leaves showing stipules k25; Fig. 7, end-cells ol teal 



