Ser. RuoposPerMEX. Fam. Spherococcoidee. 
Pruate CXVI. 
HYPNEA PURPURASCENS, Zar. 
Gun. Cuar. Frond filiform, cartilaginous, continuous, much branched, cel- 
lular; with a dense, more or less evident fibro-cellular axis, surrounded 
by several rows of angular cells, the innermost of which are largest, 
the outer gradually smaller to the circumference. Fructification of 
two kinds on distinct individuals; 1, spherical ¢ubercles (coccidia), 
sessile or immersed in the ramuli, containing a mass of small spores 
on a central placenta; 2, transversely parted ¢etraspores imbedded in 
the cells of the surface. Hypnea (Zamour.),—an alteration of 
Hypnum, the name of a genus of Mosses, in allusion to the mossy 
character of some of the original species. 
Hypnea purpurascens ; frond dull purplish-red, excessively and irregularly 
branched, bushy, cartilaginous, soft; branches alternate, elongate, 
densely clothed with slender, many times divided branchlets, whose 
ultimate divisions are setaceous ; tubercles spherical, immersed in the 
ramuli. 
GRACILARIA purpurascens, Grev. Alg. Brit. p. 122. 
PLocaria purpurascens, Lndl. 3rd Suppl. p. 51. 
CysTocLonium purpurascens, Kiitz. Phyc. Gen. p. 404. t. 58. f. 1. 
GIGARTINA purpurascens, Lamour. Ess. p. 136. Lyngb. Hyd. Dan. p. 46. 
t.12. Grev. Fl. Edin. p. 290. Hook. Br. Fl. vol. ii. p. 299. Harv. in 
Mack. Fl. Hib. part 3. p.200. Harv. Man. p.73. Wyatt, Alg. Danm. 
no. 74. 
SPH#ROCOCCUS purpurascens, dy. Sp. Aly. vol.i. p. 318. Ag. Syst. p. 236. 
Spreng. Syst. Veg. vol. iv. p. 339. Hook, Fl. Scot. part 2. p.134. 7. 
Dan. t. 1835. 
Fucus purpurascens, Huds. Fl. Ang. p.589. Sm. E. Bot. t.1243. Turn. Syn. 
p- 357. Turn. Hist. Fuc. t. 9. 
Fucus tuberculatus, Lightf. Fl. Scot. p. 226. 
Var. 8. cirrhosa ; irregularly branched and variously distorted, the branches 
zig-zag, here and there swollen, the apices lengthened into tendrils, 
which coil round the stems of neighbouring plants. 
Fucus tuberculatus, 8, Lightf. Fl. Scot. p. 927. 
GIGARTINA purpurascens, 8, cirrhosa, Zyngb. Hyd. Dan. p. 46. 
Has. On rocks and stones, within tide marks. Very common on all the 
British shores. Annual. Summer. 
Gxoer. Distr. Atlantic shores of Europe and North America. 
Descr. Root fibrous. Fronds from six inches to two feet in length, cylindrical, 
as thick as a crow’s quill at base, slightly widening towards the middle, 
and again tapering to the apex, very much branched and bushy. Main stem 
2F2 
