Ser. R hodospebmeæ. Ram. Belesseriea.
P l a t e CCLXVII.
NITOPHYLLUM LACERATUM, Grev.
Gen . Ch a e . Frond membranaceous, re tic u la ted , rose -red (rarely p u rp lish ),
irreg u la rly cleft, veinless, or fu rn ish e d w ith irreg u la r veins towards
th e base. Fructification two-fold, on d is tin c t p la n ts ; 1, convex
tubercles {coccidia) immersed in th e frond, a n d co n ta in in g a mass of
s p o re s ; 2, tetraspores g ro u p ed in to definite sori, o r spots variously
s c a tte re d over th e fro n d . N itophylltjm {Grev.), c o rru p tly formed
from nitor, brilliancy, an d <pvKKov, a leaf.
WiTOPpiLTJM laceratum ; frond sessile or shortly stipitate, much branched
dichotomously, traversed by numerous branching and anastomosing
nerves; segments linear, variously cleft and lobed, waved at the
margin, obtuse ; spots of tetraspores oblong, either marginal or borne
on distinct, leafy processes of the margin.
NiTOPHYiiuM laceratum, Grev. Alg. Brit. p. 88. Eooh. Brit. FI. vol. ii. p. 388
Wyatt, Alg. Banm. No. 107. Earv. in Mack. FI. Eih. pai-t 3. Earv Man
ÆK. l .p . 59.
C r y p t o p l e u k a lacérala, Kütz. Bkyc. Gen. t. 6 3 . vol. hi. p. 444 Sv Ala
p. 870.
A g l a io p h y l l u m laceratum, Mont. FI. Canar. p. 160. Endl. Zrd Suppl. p. 52.
D e l e s s e e ia lacérala, Ag. Sp. Alg. vol. i. p. 184. Ag. Syst. p. 251. Grev. FI.
Edin. p. 293.
WOKMSKIOLDIA la c e r a , Spreng. Syst. Veg. v o l. iv . p . 3 3 3 .
C h o n d e c s laceratus, lyngb. Eyd. Ban. p. 18.
Fncus laceratus, Gmd. Eist. p. 179. t. 21. f. 4. Good and Woodw. U m
Tram. vol. iii. p. 155. Stavk. Ner. Brit. p. 7 7 .1.13. Turn. Sun. p. 154 Turn
E is t.t.fiZ . E. Bot. 1 .1067.
Fucns crispatus. Ends. FI. Alg. p. 58. Linn. Syst. Nat. p. 1718. Esyer. Ic Fuc
vol. i. p. 130. t. 90.
Fucns eudiviæfoüus, Ligktf. FI. Scot. p. 948. t. 32.
H ab. On rocks and on the stems of Laminaria digitata, near low-water
mark and at a greater depth. Annual. Summer. Common on the
shores of the British Islands.
G e o g e . D i s t e . Atlantic Coasts of Europe and North America.
D e s c e . Root a small disc, often throwing out creeping fibres. Fronds sessile, or
with a very short, cartilaginous stem, much divided, four to six or eight
inches in length, and as much in expansion, the laciniæ varying in breadth
from a quarter of an inch to upwards of an inch. The division of the frond
is usually dichotomous, with many irregularities ; the laciniæ are linear,
or somewhat cuneiform, lobed and dentate, and often curled at the maro-in!
very obtuse, simple or repeatedly forked. The lower part of the membrane’
is always traversed by slender, branching and anastomosing, tolerably
distinct veins, which in some specimens extend and ramifv through the upper
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