Scr. RnODOSPERMEyE. Earn.
P la t e II.
DELESSERIA DYPOGLOSSUM, Ay.
Gen. Char. Frond rose-red, flat, membranaceous, with a perourrent midrib.
Fructification of two kinds on distinct individuals; 1, spherical
tuhercles [coccidia) immersed in th e frond, and containing a globular
mass of angular seeds; 2, granules [tetraspores) forming defined spots
in th e frond, or in leaf-Hke processes.
D b l e s s e r i a llypoglossum •, fro n d Hnear-lanceolate, tapering at each end, repeatedly
proliferous from the midrib, with leaflets of similar form;
tubercles on the midribs of the smaller leaflets; granules forming
linear spots at each side of the midrib.
D e l e s s e r ia Hypoglossnm, Ag. Sp. Alg. vol. 1. p. 176. Syst. p. 349. Grev.
M. Id in . p. 293. Alg. Brit. p. 75. 1 .13. Ilooh. Br. I I . vol. ii. p. 286.
Mack. I I . HU), vol. iii. p. 191. Harv. Man. p. 56. Wyatt. Alg. la nm . no. 63.
J .Ag. Medit. p .V al. Endl.3rd Suppl.p. 52. Montag. Pl.Cell.Canar.p.lit).
D e l e s s e r ia lly p o g lo s sum , Lamour. Ann. Mus. x x . p . 1 2 4 .
WoRMSKiOLDiA Hypoglossum, Spreng. Syst. Veg. vol. iv. p. 331.
H y po g lo s sum Woodwardii, Kiitz. Ph. Gen. p. 444. t. 65. f. 1.
F ucu s Hypoglossum, Woodw. in Linn. Trans, vol. ii. p. 30. t. 7. Linn. Trans.
vol. hi. p. 113. vol. iv. p. 95. In g . Bot. Turn. S y n .Iu c .
vol. i. p. 17. Hist. 1 .14. I s y . Lc. Fue. vol. ii. p. 17. t. 120.
Fuous liypoglossoides, Stack. Ner. Brit. p. 76. t. 13.
UlVA lingulata, Be Oand. M. Iran. %nd edit. vol. u. p. 14.
I Iab. In the sea, on rocks and Alg®. Annual. Summer. Frequent on
the shores of England and Ireland; rare in Scotland.
G e o g r . D is t r . Atlantic shores of Europe, frequent. Rare in the Mediterranean,
and of small size. Canary Islands, Webh.
D e s c . Boot, a minute dise. Fronds tufted, consisting of a primary leaf 2 - 8 inches
in length, and from a Une to half an inch in breadth, linear-lanceolate, rose-
red and membranous, with a distinct midrib, and faint traces of obliquely
transverse striie, throwing out from its midrib numerous similar leaves,
which again produce others, until the plant becomes exceedingly bushy and of
a globular figure. The apices of the leaflets are more or less tapering or acute.
I f placed in fresh water the colouring matter is soon discharged. The tu bercles
are globose, forming a dark-red swelHug in the substance of the midribs
of the smaller leaflets, gcneraUy about their crentre, and contain a large
number of minute seeds; and the granules form linear patches along the
midribs of the leaves of distinct, and generally more luxm-iant, plants.
Our figure, which represents a larger state of the plant than is
commonly met with, though by no means the largest we have
B 2