Plcell.aph. 1.AYDROPHYTZE. 10.Vauch. 29% 
Tufts very densely entangled, an ell long, floating; 
branches divaricating. 
8. Vaucheria ornithocephala. _ Birds-head vaucher. 
Fresh-water ; threads branched; branches scattered ; 
vesicles ovate, obliquely beaked; peduncles perpendicular. 
Conferva vesicata, Dillw. 74. 
Vaucheria ornithocephala, Agardh Syn. 49. 
Ditches ; autumn. 
Tufts entangled, floating; threads scattered, rather 
straight; vesicles 2 or 4 together, 1-sided, resembling a bird’s 
head ; peduncles very short. 
b. Pesicles in pairs, with a tarren branch between them. . 
9. Vaucheria sessilis. Sessile vaucher. 
Fresh-water; threads hairlike, branched ; vesicles sessile, 
mostly in pairs, ovate, intermediate barren branch turned 
back. 
Ectosperma sessilis, Vaucher, 31. 
Vaucheria sessilis, De Candolle Fl. Fr. 2,633 Engl. Bot. 1765. 
Stagnant waters and ditches; April. : 
Tufis very dense, floating; vesicles sometimes solitary. 
10. Vaucheria geminata. Doubled vaucher. 
Fresh-water ; threads hairlike, forked; vesicles in pairs, 
globose, opposite, on a common horned pedancle; horn m- 
termediate, straight. 
Ectosperma geminata, Faueher;:29. 
Vaucheria geminata, De Candolle Fl. Fr. 2, 623 Engl. Bot. 1766. 
Stagnant ditches; February. 
Tufts very close, floating; peduncles 3 times as long as 
broad, horizontal ending in a slightly jointed, barren, 
straight point. 
11. Vaucheria cespitosa. _ Turf vaucher. 
Fresh-water ; threads hairlike, tufted, forked, branched ; 
last branches horizontal, facing one way, vesicle-bearing ; 
vesicles in pairs, sessile, terminal, with a short, straight, 
intermediate point. 
Conferva canalicularis, Lin. S. P. 1634. 
Conferva fontinalis, Blumenbach in Goett. Mag. 1781, 80. 
Ectosperma cespitosa, Vaucher, 28. 
Vaucheria cespitosa, dgardh Syn. AB, 
Springs, in clayey sofls; April. 
u 2 
