CRYPTOGAMIA. ALGiE. Thbmella. 
71 
(Tr. intumes'cens. Sessile, clustered, twisted, tumid, brown, shin¬ 
ing, gelatinous: when dry, thin and membranous. E. Bot. 
E. Bot. 1870. 
In perfection in wet weather only. 
Brown Jntumescent Tremella. On a beech in St. Leonard’s Forest, 
Sussex. Mr. W. Borrer. Jan.—E.) 
Tr. utricula'ta. Green, sessile, tubercled; tubercles hollow. 
( Hoffm . Crypt. 1. 8. 2. E.)— Dill. 10. 16— Mich. 67. 2. 
Spreading widely over rocks and stones under water, green, stiffish, 
brittle, half to two inches thick, rather shining, sometimes smooth. 
Tubercles hollow within, from the size of a pea to that of a hazle nut. 
Huds. n. 6. Dull green, variously folded in the central part, dilating 
when immersed in water into various hollow bags. Dill. .54. 
(Submersed Hollow Tremella. E.) On stones and rivulets about 
Pentir and Llanberris. Dill. Mountainous rivulets in Westmoreland and 
Cumberland. Near Tideswick, Derbyshire. P. Jan.—Dec. 
Tr. cris'pa. Dark green, tender, curled ; growing on the ground. 
Dill. 10. 12. 
Very thin ; of a fine green colour. Expanded on, and slightly adhering to 
the earth, but without any apparent roots. Dill. 52. 
(Crisped Membranous Tremella. E.) Ulva lactuca y. Huds. 567. 
Ulva crispa. Lightf. 972. With. Ed. 2. Ray Syn. p. 64. n. 12. 
At the bottom of walls and houses, in moist shady places. Nov.—Feb. 
Tr. verruco'sa. Bright green, tubercled, solid; wrinkled. 
Very tender bright green. Huds. Jelly-like, dull green forming a mem¬ 
brane composed of two laminae, variously contorted. Tubercles minute 
roundish grains, united together. Gmelin. Fuc. 227. 
(Tubercled Fresh-water Tremella. JVostoc verrucosum. Agard. 
Hook. E.) On stones in cle-ar brooks and springs. P. Jan.—Dec. 
Tr. HEMisPHiE r RicA. Bright green, hemispherical; scattered. 
(E . Bot. 1798. E.) Wieg. Obs. 2. 3. 
This usually vegetates with a very small, but hard spherical excrescence ; 
and varies in size from the minutest point to that of a small vetch. It 
sometimes covers the rocks to a considerable extent. At very low- 
water in spring tides., and upon those submarine rocks which, at that 
period only, are exposed to air, I have very frequently found this plant 
(as I conceive it to be) in an inflated state, quite globular and more than 
an inch in diameter. It is then of a most beautiful transparent green 
colour: it afterwards collapses and dries into a hard sinuated crust, not 
hemispherical, but of the same colour and texture as the Tremella, and 
indeed the edges of it are oftentimes rounded in a manner exactly similar 
to the plant described. These are found in small masses of the Tre¬ 
mella, growing promiscuously therewith. Major Velley. Consists of 
granules fixed to the stones without any order; globular, but flatted 
on the under side, so that they may be considered as hemispheri¬ 
cal ; from half to one and a half line in diameter; slippery, gelatinous but 
tough, so as not to be easily broken by pressing between the fingers. 
Wieg. Obs. p. 39. 
(Hemispherical Salt-water Tremella. Rivularia atra. Agard. 
