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P l a t e LXX.
STILOPHORA RHIZODLS, /. Jg .
G en . C h a r . Root a small, naked disc. Frond filiform, solid or tubular,
branched. Frnctijication, convex, wart-like sori sc attered over the
surface, composed of obovate spores nestling among moniliform, vertical
filaments. S t i lo p h o r a ( / . Ag.),—ivom TTiXr,, a p oint or dot,
and 4>opia,, to hear ■, in allusion to th e dot-like fructification.
, branched, the
I, forked; fruc-
Stilophora rhizodes; frond subsolid, much and irr ^
branches subdichotomous, attenuated; ramuli scatter:
tifioation densely covering the whole plant.
S t i l o p h o r a rhizodes, / . Ag. I/inn. vol xv. p . 6 . Endl. 3rd Suppl. p . 3 6 .
Spermatochnus rhizodes, Kiitz. Elnje. Gen. p. 335.
S po r o c h n u s liiizodes, Ag. Sp. Alg. vol. i. p. 156. Ag. Syst. p. 260. Spr.
Syst. Veg. vol. iv. 329. Grev. Alg. Brit. p. 43. t. 6. Hook. Br. 11. vol. n.
p. 275. Harv. in Mack. El. Hih. part 3. p. 173. Wyatt, Alg. Damn. no. 5.
Harv. Man. p. 27 (excl. var. ß.).
C h o r d a r ia rhizodes, Ag. Syn. p. 15. Lyngb. Hyd. Dan. p. 52. 1 .13.
F u cu s rhizodes. Turn. Hist, t 335.
C o n f e r v a rhizodes. Ehr. in Herb.
Co n f e r v a g ra c ilis, Wulf. Crypt. Aguat. n o . 2 3 .
C o n f e r v a verrucosa, E.Bot. t. 1688.
C e r am iu m tuberculosum, Roth, Cat. Bot. vol. ii. p. 162. vol. 113.
H a b . Near low water mark, grovdng either on rocks, or parasitically on
other Algm. Annual. Summer. Southern shores of England, frequent.
Common on the eastern, southem, and western shores of Ireland.
Belfast Bay, and Strangford Lough, Mr. W. Thompson. Jersey, Miss
White and Miss Turner.
G e o g e . D i s t r . Atlantic shores of Eui-ope. Baltic Sea.
D e s c r . Root, minute, scutate. Eronds solitary, or tufted, from six inches to two
feet, .01- more, in length, cylindrical, filiform, much and mregularly branched,
sometimes pretty regularly dichotomous, sometimes with a leading stem bent
in a flexuous or zigzag manner, and furnisbed with closely set, alternate
branches, which are more or less regularly dichotomous. lu some specimens
several of the branches are secund, and plentifully beset witb short, simple,
or forked ramuli; in others the branches are bare aud but little divided. In
all varieties the axils are obtuse, and tbe apices taper to a more or less foie
point. Tbe fructification is very densely dispersed over the whole frond, giving
the branches a warted or knotted aspect. The warts are either hemispliencal
or oval, and consist of radiating, beaded, clavate, simple filaments, among
which obovate spores, with wide borders, and narrow, tapering bases ai'e
found fixed to the surface of the frond. In a young state the frond is (pute
solid, composed of rouudisli or subliexagonal cells, tbe outermost of which