Ser. RuoposPERME®. Fam. Delesserice. 
Piate, XXIII. 
NITOPHYLLUM BONNEMAISONIL, Grev. 
Gen. Cuar. Frond membranaceous, reticulated, rose-red, (rarely purplish), 
irregularly cleft, veinless, or furnished with irregular ves toward the 
base. ructification, two-fold, on distinct plants: 1, spherical ¢uber- 
cles (coccidia) immersed in the frond, and containing a globular mass 
of angular spores ; 2, ¢e¢raspores grouped into definite sori or spots, 
variously scattered over the frond. Nrropnytium—corruptly formed 
from nitor, to shine, and pirAdoyr, a leaf’; shining-leaf. 
Nrropxyttum Bonnemaisoni ; frond shortly stalked, fan-shaped or palmate, 
variously cleft into numerous wedge-shaped segments, furnished near 
the base with irregular, vanishing nerves ; spots of granules roundish, 
scattered over the surface of the frond. 
Nrropuyitium Bonnemaisoni, Grev. Alg. Brit. p. 81. Hook. Br. Fl. vol. ii. 
p- 287. Harv. in Mack. Fl. Hib. part 3. p.193. Harv. Man. p. 58. 
Dexesserta Bonnemaisoni, 4g. Sp. Alg. vol.i. p. 186. Ay. Syst, p. 252. 
Grev. Sc. Crypt. Fl. t. 322. 
AGLATOPHYLLUM Bonnemaisoni, Endl. 38rd. Suppl. p. 52. 
Has. Growing on the stems of Laminaria digitata; and on rocks and 
stones in 4—5 fathom water. Annual. Summer. Orkney, ev. 
C. Clouston. Bute, Dr. Greville. Larne, Dr. Drummond. Youghal, 
Miss Ball. Torquay and Ilfracombe, Mrs. Griffiths. Tramore, 
Miss Taylor. Miltown Malbay and Kilkee, W.H.H. Strangford 
Lough, WV. Thompson, Esq. Jersey, Miss White. 
Grocer. Dist. Coast of Normandy, Bonnemaison. British Islands. 
Dusc. Root a small disc. Stem a quarter of an inch long, cylindrical, expanding 
into a fan-shaped, delicately membranaceous frond, 2—4 inches in length, 
and rather broader than its length, rarely quite veinless; usually marked 
toward the base with more or less evident, vanishing nerves, which some- 
times extend considerably up the segments, and sometimes are nearly con- 
fined to the very base. The habit of the frond varies much in different in- 
dividnals, in some the lamina is very broad and not deeply cloven ; in others 
cleft nearly to the base in long ribbon-like segments. The division is pretty 
regularly dichotomous, but the margin in some specimens is proliferous, 
giving the frond a very compound aspect. Co/owr a fine rosy red, becoming 
brownish, especially toward the base, in drying. Re¢iculations (fig. 3, 5.) 
smaller than in N. versicolor. Tubercles small, not very prominent, scattered 
over the frond. Spots of ¢etraspores oblong or, roundish, minute, but larger 
than those of N. Hillie, very abundantly scattered over the surface. It 
more or less perfectly adheres to paper in drying. 
The fan-like outline, scattered groups of tetraspores, and obscure 
G 
