,
P l a t e CCXCII.
POLYSIPHONIA LLONGATA, Grev.
G e n . Chau. Frond filamentous, partially or generally a rticu la te ; joints
longitudinally striate, composed of numerous radiating cells or tubes,
disposed round a central cavity. Fructification twofold, on different
individuals; 1, ovate capsules (ceramidia) furnished with a terminal
pore, and containing a tu ft of pear-shaped spores; 3, tetraspores,
imbedded in swollen branchlets. P o l y s i p h o n i a (Grev.),— ixom
TToXvs, many, and mtjnov, a tube.
P o l y s i p h o n i a elongata; stems robust, carthaginous (rarely gelatinous),
irregularly branched, beset, especially towards th e tips, with slender,
close-set, multifid ramuli, which are attenuate to the base and apex ;
articulations about as long as broad (the upper ones rarely once and
half to twice as long), those of th e stem reticulated with veins and
more or less obsolete.
P o l y s i p h o n i a elongata, H a n . in Hook. Br. FI. vol. ii. p. 333. fig -
Banm. no. 40. Harv. in Mack. FI. H ii. part 3. p. 309. Harv. Man. ed. 3.
p. 86. J. J g . Alg.]>.l36. Fndl. 3rd Suppl.-p. 4i5. Kiitz. Phyc. Gen.-p. i2S.
Sp.Alg. p. 838.
P o l y s i p h o n i a lluchingeri, J . Ag. ! Alg. Medit. p. 136. Kg. ! Phyc. Gen.
p. 438. Kg. ! Syst. Alg. p. 839.
P o l y s i p h o n i a rosea, Grev. ! FI. Edin. p.
P o l y s i p h o n i a stenocarpa, Kg. Sp. Alg. p. 830. (fide sp. a Zanard)
P o l y s i p h o n i a chalaropUaia, Ay. ! Sp. Alg. p. 831.
P o l y s i p h o n i a clavigera, Kg. Sp. Alg. p. 831. (fiide sp. a Zanard.)
H u t c h in s ia e lo n g a t a , Ag. Syn. p . 5 4 . Hook. Scot. p a r t 3 . p . 8 7 . Ag. Syst.
p . 1 5 3 .
H u t c h i n s i a E u e h i n g e r i , Ag. Sp. Alg. v o l . i i . p . 8 6 .
C e b a m i u m elongatum, Roth, Cat. Bot. vol. i i i . p. 138. Ag. Bisp. p. 19.
Lyngb. Hyd. Ban. p. 117. t. 66. D. 1. Grev. FI. Edin. p. 310.
C e b a m i u m brachygonium, lyngb. Hyd. Ban. p. 118. t. 36.
C o n f e r v a elongata, Huds. FI. Angl. vol. ii. p. 599. Billw. Conf. t. 33. and
suppl. t. G. E. Bot. t. 3439.
■ H ab. Common on stones and shells, in pools between tide-marks, and
attached to oyster and soaUop shells, &o., in 5 -1 0 fathoms water.
Perennial, or a t least biennial. Spring and summer.
G b o g r . D i s t r . Atlantic and Mediterranean shores of Europe. North America.
D e s c r . Boot a small disc. Fronds solitary, or a few together, but scarcely tufted,
from six to twelve inches high, robust, varying in diameter from tbe thickness
of hog’s bristle to that of the antenna of a lobster, rising with an uii