Ser. CHLOROSPERME®. Fam. Siphonee. 
Puate CXIX. 
BRYOPSIS HYPNOIDES, Zamour. 
Gen. Cuar. Frond membranaceous, filiform, tubular, cylindrical, glistening, 
branched; the branches imbricated or distichous and pinnated, filled 
with a fine green, minutely granuliferous fluid. Bryopsts (Lamour.),— 
from Bpvov, a moss, and ¢ynus, an appearance. 
Bryopsts Aypnoides; frond slender, very much branched; branches long, 
repeatedly compound, densely clothed with capillary, elongate ramuli 
ramellose towards their tips; ultimate ramelli irregularly inserted, 
erect. 
Bryopsts hypnoides, Lamour. Journ. Bot. 1809. p. 135. t.1.f.2. Grev. 
Alg. Brit. p. 188. Hook. Br. Fl. vol.ii. p. 318. Wyatt, Alg. Dann. 
no. 81. Harv. Man. p. 146. Harv. in Mack. Fl. Hib. part 3. p. 233. 
Bryopsis Arbuscula, 4g. Sp. Aly. vol.i. p.451. Ag. Syst. p. 179.  Kiite. 
Phye. Gen. p. 307. 
Has. On rocks, or parasitical on the smaller A/y@ in submarine tide- 
pools, in shaded situations, also on Laminaria saccharina, beyond 
tide: marks. Annual. Summer. Not uncommon in many places 
from Orkney to Cornwall and Jersey. Particularly abundant in parts 
of the west of Ireland. 
Groer. Distr. Atlantic shores of Europe. Mediterranean Sea. 
Descr. Root composed of branching fibres matted together. Fronds densely 
tufted, from two to six inches long or more, the principal stems as thick as 
hogs’ bristles, repeatedly and excessively branched, the whole frond having 
a broadly ovate or conical outline. Branches crowded, alternate, long and 
simple, very erect, naked below, above more or less densely clothed with 
similar irregularly placed lesser branches of much less diameter. These in 
theivturn produce a third series of capillary ramuli, long simple hair-like and 
very slender, irregularly feathering the apex of the branch from which they 
spring. Larger specimens only differ from smaller ones in being more re- 
peatedly divided, the system of branching being the same in all. The sub- 
stance is very lubricous and flaccid, and soon decomposes in fresh water, 
the membranous wall of the cells bursting, and discharging a fine granular 
fluid. Colour when growing, a peculiarly deep, rich green, when dry, be- 
coming paler, and more yellow. The plant most closely adheres to paper, 
and the principal stems and branches retain a gloss, as if they had been 
varnished, but the ramuli are not glossy. 
This is a more slender plant than 2B. plwmosa, and much more 
branched ; with more abundant, less regular, and longer ramuli, 
but specimens sometimes occur which show a very close con- 
nection between them, On the west of Ireland B. hypnoides is 
2G 
