10 



Amici, 1827; Chara flexilis vars. acarpa and ramentacea, Wallr, 

 1833; Ch. syncarpa var. capitata Gant, 1847 ; Chara glomerata, Bis- 

 choff, 1828; Chara gracilis, Wahlenberg, 1826; Chara gracilis vars. 

 epicarpa and syncarpa, Wallr; Nitella syncarpa var. oxygyra, A. Br., 

 1847 ; N . syncarpa vars. capitata and gloeocephala, Kuetzg. . 



This plant usually attains a length of 20 to 30 cm., is much 

 branched, very flexible, bright green, rarely incrusted. Fruiting as it 

 does early in the spring, it disappears early in the season ; it is 

 found in clear spring water. The leaves, usually eight in each verticil, 

 are once forked ; the terminal segments are one-celled and abruptly 

 pointed. The fruit develops at the nodes of the leaves. The oogonia 

 are aggregated, usually two or three. The coronula is evanescent. 

 The oospore is nearly round, marked when mature by six prominent 

 and sharp ridges, 280 to 360 long, the surface coarsely granulated. 

 The antheridia are about 600 in diameter. All the fruiting organs are 

 thickly enveloped in jelly. 



This species, which is common and very variable in Europe, has 

 been met with in America only in Cambridge, Mass., 1867 (Boot), 

 and on Long Island, New York, in 1870, by the writer. Repeated 

 search in the cold streams near Hempstead, L. I. (the original locality), 

 has failed to re-discover the plant. The form then found was long- 

 leaved, slender and immature. It is to be looked for in May in clear, 

 cold brooks. 



NITELLA BASTINI, sp. nov. Nitella monarthrodactyla, fnrcata, 

 homtvophylla, glceocarpa, dioica. 



Plants 2 to 3 cm. high, quite rigid, with verticils of rather short 

 leaves, 8 to 12 in a verticil. Leaves all once divided. In the female 

 plants the leaves are rather longer and larger than in the male ; in the 

 female the first segment averages 2675 long by 320 broad; in the male 

 1500 long, 215 broad. The terminal segments, two in number, are 

 150 to 400 long, 120 broad, rather abruptly acuminate. 



The fruit of both sexes is enveloped in mucus and in some cases ap- 

 pears to be stipitate, especially when, as often noticed, it is found within 

 a verticil, at the base of the leaves. 



Antheridia 600 to 625 in diam. ; oogonia aggregated, oospores 265 

 to 300 long, 235 to 250 broad; ridges 7 to 8 ; surface beautifully re- 

 ticulated. 



This new and very distinct species was gathered by Prof. Bastin, of 

 Chicago, near that city, on the site of the World's Fair (the original 

 locality is destroyed). 



The plants seem quite rigid, sometimes encrusted and even brittle. 

 While the synopsis associates it with the preceding species, it has no 



