292 10. Vauch. 1 . HYDROPHYTE. PL cell . apL 
Tufts very close, blackish green ; threads light green, 
bent at bottom, lying down, above upright ; last branches 
horizontal, spreading. 
c. Vesicles numerous . 
12. Vaucheria racemosa . Bunch voucher. 
Fresh-water; threads hairlike, forked ; vesicles crowded, 
peduncled, in racemes. 
Ectosperma racemosa, Vancher , 32. 
Vaucheria racemosa, Dc Candolle FL Fr. 2, 61. 
Stagnant ditches; annual; April. 
Tufts close, entangled, floating; threads bent, branched; 
peduncles coming out at right angles, short, racemose ; 
vesicles 4, or many, crowded together. 
13. Vaucheria mnlticapsularis. Many-fruited voucher. 
Land ; threads very minute, creeping, much branched; 
branches upright, simple, thicker at the tip; vesicles on the 
branches, spherical, crowded. 
Conferva inulticapsularis, Dillwyn. 71. 
Vaucheria mttlticapsularis, 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. 
I. Codmm subglobosum. Globular codium. 
Mass spherical, hollow. 
Bursa marina, Rail Syn. 31,3. 
Alcyonimn Bursa, Lin. Syst . Nat. 
Spon£ dium Bursa, Lamaroux Essai. 
Fucus subglobosus, Ltementi in MSS. 
Fucus Bursa, Turner Hist. 3, 6 ; Engl, Rot . 2183. 
Codium Bursa, Jgardh Disp, 24. 
J§ea coasts. 
