290 1 0. Vauch. 1 . HYDROPHYTES. PL cell aph. 
Ectosperma hamata, Vaucher , 26. 
Vaucheria haraala, De Cund. FI. Fr. 2, 63. 
Ditches; April. 
Tufts very dense, floating in water; peduncles mostly 
facing one way, 4 times as long as the vesicle. 
4. Vaucheria terrestris . Land vaucher. 
Land; threads hairlike, ascending, branched; ramuli 
very short, facing one way ; vesicles sessile, single, globose. 
Ectosperma terrestris, Vaucher , 27. 
Vaucheria terrestris, De Cand. FI. Fr. 2,62. 
Naked ground, damp shady places; April and August. 
Tufts entangled, very dense ; upper branches spreading, 
short ; vesicles in the fork, or at the side of the branches. 
5. Vaucheria Dillwynii. Dillwyiis vaucher . 
Land; threads hairlike, flexuous, branched; vesicles 
nearly sessile, single, globose. 
Riccia arachnoidea, Flor. Dan. 1,890. 
Ceramium Dilluynii, Roth Cat. 3, 117. 
Conferva frigida, Dillw. 16. 
Conferva Dillwynii, Weber and Mohr , in Dillw. 16. 
Vaucheria Dillwynii, FI. Dan. 1595, 1. 
Damp shady places. 
Tufts very close; threads decumbent, entangled ; vesicles 
rarely peduncled ; peduncles very slight. 
6. Vaucheria granulata. Granulated vaucher . 
Land; threads branched, creeping, or buried in the 
ground ; vesicles solitary, globular, terminal. 
Ulva granulata, Lin. S. P. 1633. 
Tremella granulata, Hudson FI. Angl. 560 ; Engl. Bot. 324. 
Linkia granulata, TVigg Prim. FI. Hols. 94. 
Ulva radicata, Retz. Prodr. 303. 
Vaucheria radicata, Agnrdh Disp. ed. 1, 22. 
Vaucheria granulata, Lyngbye Hydr. Dan. 78- 
Dried-up ditches on clay; ephemeral; autumn. 
Threads very short, green above; vesicles globular, about 
the size of mustard-seeds, cracking under the feet. 
7. Vaucheria clavata. Clulled vaucher. 
Marine ; threads hairlike, branched at the tip ; vesicles 
solitary, in the clublike tips of the reflex branches. 
Ectosperma clavata, Vaucher , 34. 
Vaucheria clavata, De Candolle FI. Fr. 2,60. 
Conferva dilatata, Roth Cat. 3, 183. x 
Conferva vesicata, Muller N. Act. Petr. 3, 95. 
Salt-water ditches; annual; April and September. 
