Ser. RHoposPpERMEX. Fam. Delesseriea. 
Puate CLXIX. 
NITOPHYLLUM HILLIA, Grev. 
Grn. Cuar. /rond membranaceous, reticulated, rose-red, (rarely purplish) 
irregularly cleft, veimless, or furnished with irregular veins towards 
the base. Fructification two-fold, on distinct plants; 1, convex 
tubercles (coccidia) immersed in the frond, and containing a mass of 
spores; 2, ¢e¢raspores grouped into definite sov7, or spots, variously 
scattered over the frond. NiropHyiium (Grev.),—corruptly formed 
from nitor, to shine, and pvddor, a leaf. 
Niroruytitum Hillie; frond thickish, but tender, veiny towards the base, 
of a roundish outline, very irregularly and more or less deeply cleft ; 
the segments oblong, slightly waved, obtuse; spots of granules dot- 
like, very minute, densely scattered over the surface of the frond. 
Nrropuyiium Hillie, Grev. Alg. Brit. p. 80. 
NiropHyLiuM ulvoideum, Hook. Br. Fl. vol. ii. p. 287. Wyatt, Alg. Danm. 
no. 16. Harv. Man. p. 57. 
AGLAIOPHYLLUM Hillie, Endl. 3rd Suppl. p. 52. 
Dexesseria Hille, Grev. Crypt. Fl. t. 351. 
Has. On the shady sides of deep, tidal pools, near low-water mark. Rare. 
Annual. Summer and autumn. Plymouth, Wiss Hid/ ; also Messrs. 
Rohloff, Hore, and Cocks. Torquay, Mrs. Griffiths. Whitsand Bay, 
Dr. Jacobs. Scilly Islands, Miss White. Mountsbay, Mr. Ralfs. 
Jersey, Miss Turner. Valentia, Ireland, WV. H. H. 
Geroar. Distr. Coast of France, rare. 
Descr. Root a small, conical callus. Stem from a line to nearly half an inch in 
length, cylindrical at base, compressed upwards, and rapidly expanding into 
a roundish or somewhat flabellate frond, from four to twelve or sixteen 
inches in length. Frond very irregularly divided ; sometimes nearly simple, 
with a few shallow marginal lobes, or broad crenatures ; ‘sometimes deeply 
cleft, nearly to the base, into a few broad segments, lobed at the margin ; 
and sometimes deeply cut into ribbon-like lacinie, proliferous from the 
margin, and considerably waved and crisped. Through the lower part of 
the frond run numerous, branching, flexuous veins, which are more or less 
apparent in different specimens, sometimes being very faint, sometimes 
strongly marked; and rarely, if ever, wholly absent. Tudercles as large as 
turnip-seed, scattered, hemispherical, containing a tuft of moniliform fila- 
ments, fixed to a central placenta, and forming spores from their terminal 
articulations. Tetraspores grouped in minute, roundish or oblong, dot-like 
sori profusely scattered over the greater part of the frond. Substance rather 
thick, tender, semi-transparent, adhering to paper in drying, in which state 
the surface retains some gloss. Colour, when growing, a fine, deep-crimson ; 
becoming rosy in old age; changing to orange in fresh water, and, when 
dry, acquiring a brownish tint. 
