72 CRYPTOGAMIA. ALGiE. Puces. 
Hook. E.) Only upon rooks; never upon Fuci or Confervas. Mr. 
Stackhouse. p. Jan.—Dec. 
TR. diffor'mis. Dull green; roundish; indented, of various forms, 
jelly-like. 
(Grevi Scot. Crypt. 53. — E. Bot. 1956. E.) 
Very nearly allied to T. verrucosa, but is soft and grows on Conferva. Linn. 
Suec. n. 1140. 
(Globular Submarine Tremella. Chaetophora marina. Lyngb. Grev. E.) 
On Conferva and Fuci growing on submarine rocks. I have always 
found it adhering to the bare rock. Mr. Stackhouse. (From the size of 
a pea to that of a walnut; not unfrequently attached to Algae. E.) 
in. viola'cea. Violet-coloured; wrinkled, smooth underneath, Ray 
Syn. 22. n. 4. 
Bull. 499. 5. 
Very much resembling the tartar of red wine. Relh. Between leathery 
and gelatinous, variously wrinkled and contorted, flat and smooth under¬ 
neath. Colour dull violet. Ray. p. 22. n. 4. 
(Violet Tree Tremella. E.) Hdvella mesenterica. Dicks, p. 20. 
Seems rather to belong to the Helvellae. Relh. Suppl. 1. 39. 
Decayed branches of trees. On rails, after much rain, in December. 
Tr. amethys'tea. Violet-coloured, lobed ; surface furnnyed. 
Bolt. 101. 2 — Schwjf, 323 and 324 — Jacq. Misc. ii. 22 — Bull. 499. 5. — 
Batsch. 53. 
Gelatinous ; generally growing in clusters. Stem very short, solid, varying 
much in shape, purplish; sometimes none. Pilaus purple, variable, 
hemispherical, or funnel-shaped, or like a flower; lobed, or plaited, or 
curled. Schaeffer. Stem sometimes one quarter of an inch high, and very 
distinct. Upper part convex, with or without a dimple in the centre. 
Substance of a fine reddish purple, gelatinous and semi-transparent. 
(Amethystine Tremella. E.) Helvetia sarcoides. Dicks. Elvelapurpurea. 
Schseff. Lichen sarcoides. Jacq. On rotten wood. Nov.—Feb. 
FU'CUS. # Fructification consisting of capsule-like glo¬ 
bules, or of granulations within the substance 
of the plant, with a perforation above them. 
(Or, according to Dr. Hooker:— 
Receptacles tuberculated, tubercles perforated, 
containing within clustered capsules, - mixed 
with jointed fibres. E.) 
Obs. The genus at present consists of a collection of marine plants, some 
of which approach in their habit and jointed structure to the Confervae, 
still more of them resemble the membranaceous or gelatinous Ulvee, whilst 
the strong and leather-like sorts are sufficiently distinct from either. 
SUBDIVISIONS OF FUCUS. 
A. With Bladders. 
B. Leaves Pod-like. 
C. Jointed; Necklace-like. 
* (Probably from "fy'aoj, a Greek term designating a marine plant, and also the red 
dye its produce, used by the ancients as a cosmetic. E.) 
