292 10. Vauch. 1. HYDROPHYT. Placell. aph. 
Tufis very close, blackish green; ¢hreads light green, 
bent at bottom, lying down, above upright; last branches 
horizontal, spreading. 
c. Vesicles numerous. , 
12. Vaucheria racemosa. Bunch vaucher. 
_ Fresh-water ; threads hairlike, forked ; vesicles crowded, 
peduncled, in racemes. 
Ectosperma racemosa, Faucher, 32. 
Vaucheria racemosa, Dz Candolle Fl. Fr. 2, 61. 
Stagnant ditches; annual; April. 
Tufis close, entangled, floating; threads bent, branched; 
peduncles coming out at right angles, short, racemose; 
vesicles 4, or many, crowded together. 
13. Vaucheria multicapsularis. Many-fruited vaucher. 
Land ; threads very minute, creeping, much branched; 
branches upright, simple, thicker at the tip; vestcles on the 
branches, spherical, crowded. 
Conferva multicapsularis, Dillwyn. 71. 
Vaucheria multicapsularis, Lyngbye Hydr. Dan. 89. 
Damp shady places, among mosses. 
Tufts small, entangled, irregular; threads appearing as 
if stoloniferous; branches sometimes forked; vesicles stuffed 
with sporidia, sometimes solitary; sporidia greenish, cylin- 
drical, oblong. 
/ 
XI. 11. CODIUM. Stackhouse. Codium. 
Thallus threadlike, tubular, continuous, very closely en- 
tangled into a forked, spherical, or flat dark green sponge- 
like mass; branches horizontal, sometimes clublike at the 
tip, or divided, all pointing to the surface of the mat; 
sporidia granular, green, in the tubes and branches. — 
Marine, dark green becoming white by exposure to the air. 
1. Codium subglobosum. Globular codium, 
Mass spherical, hollow. 
Bursa marina, Rati Syn, 31, 3. 
Alcyoninm Bursa, Lin. Syst. Nat. 
Spongidiam Bursa, Lamaroux Essai. 
Fucus subglobosus, Clemenéi in MSS. 
Fucus Bursa, Turner Hist.3,6; Engl. Bot, 2183, 
Codium Bursa, Agardh Disp. 24. 
Sea coasts. 
