Ser. RHoDOSPERMEA. Fam. Ceramiea. 
Pratz CLXXIX. 
CALLITHAMNION TURNER], %. 
Gen. Cuan. Frond rosy, or brownish-red, filamentous ; stem either opake and 
cellular, or translucent and jomted, branches jointed, one-tubed, mostly 
pinuate (rarely dichotomous or irregular); dissepiments hyaline. Fruit 
of two kinds on distinct plants ; 1, external ¢e¢raspores, scattered along 
the ultimate branchlets, or borne on little pedicels; 2, roundish or 
lobed, berry-like receptacles ( favellz) seated on the main branches, 
and containing numerous angular spores. CALLITHAMNION (Lyngb.), 
from xados, beautiful, and Sapnovr, a Little shrub. 
CaLLitHaMNION Turner; filaments rising from creeping fibres, simple or 
repeatedly branched, once or twice pinnated with opposite, spreading 
simple ramuli; articulations of the main filaments 5-10 times longer 
than broad ; tetraspores clustered, subracemose or corymbose, favelle 
involucrated, stalked. 
CaLLITHAMNION Turneri, 4. Syst. Alg. vol. ii. p.100. Harv. in Hook. Br. 
Fi. vol. ii. p. 339. Wyatt, Alg. Danm. no. 183. Harv. in Mack. Fl. Hid. 
part 3. p.217. Harv. Man. p.114. J. Ag. Alg. Medit. p. 70. Endl. 
3rd Suppl. p. 34. Kitz. Phyc. Gen. p. 373. 
CALLITHAMNION repens, Lyng. Hyd. Dan. p,128.t.40. Ag. Spec. Alg. 
vol. ii. p. 184. Harv. in Hook. Br. Fi. vol. ii. p. 348. Harv. in Mack. Fi. 
ib. part 3. p.218. Harv. Man. p.115. Kiitz. Phyc. Gen. p. 372. 
CALLITHAMNION variabile, 4g. Sp. Alg. vol.ii. p. 163? Kitz. Phyc. Gen. p.372. 
Creramium Turner, Roth. Cat. vol. ii. p. 128. t.5. Ag. Syst. p. 142. Grev. 
Crypt. t. 355. 
CERAMIUM repens, 4g. Syn. p. 63. Ag. Syst. p. 131. 
ConFERvVA Turneri, Didlw.t. 100. #. Bot. t. 2339 (not. t. 1637). 
Conrerva repens, Dillw.t.18. Roth. Cat. vol. iti. p. 221. #. Bot. t. 1608. 
Fl. Dan, t. 1665. ~ 
Conrerva tenella, Dillw. Syn. p. 72. t. F. 
‘Has. Parasitical on other Algz, between tide marks. Annual. Summer. 
Not uncommon. 
Grocer. Distr. Atlantic shores of Europe and North America. Mediterranean 
Sea. 
Descr. Filaments rising from numerous prostrate fibres which creep, by means 
of small, discoid roots, over the surface of other plants, densely tufted, one 
to two inches high, capillary, simple or repeatedly branched; the branches 
very generally opposite, sometimes alternate, spreading, pinnated or bi- 
pinnated with simple, slender, elongated, patent, opposite, or rarely alter- 
nate ramuli. 4rticulations of the main stem from five to ten times longer 
than broad ; those of the ramuli4—5 times; all with a narrow endochrome, 
bordered by a wide hyaline coat. Dissepiments broad. Tetraspores globose, 
VOL. Il. P 
