300 CRYPTOGAMIA. FUNGI. Auricularia. 
Obs. These plants when young lie flat and are closely attached to the 
substance on which they grow, the upper surface being smooth, but the 
under surface shaggy with hairs which serve the purpose of radical fibres. 
After some time the attachment formed by these fibres loosens, and the 
plant turns up more or less, but remains still connected in some one part, 
either central or lateral. The smooth upper side then becomes the under 
one and from this the seeds are discharged. The fibrous surface, now 
uppermost, continues shaggy or woolly, often appears streaked or zoned 
in concentric stripes, and frequently assumes a variety of colours. A 
process similar to this takes place in some of the stemless Agarics and 
Boleti. See Ag. quercinus and Bol. versicolor. 
Aur. ferrugin'ea. (Bull.) Perennial, leathery, thin, zoned above, 
smooth underneath, but pimpled, brown, rusty red. 
Bull . 378— Sowerby 26— Bolt. 82. d — Mich. 66. 2. 
Grows very much tiled. The zones more apparent on the upper than on 
the under surface, about one or one inch and a half wide, and half as 
much in breadth. Bulliard observes that if a portion of the under 
side be dissected from the upper coat, it appears perforated in the mi¬ 
croscope. 
(Rusty Auricularia. Aur. ferruginea. Sowerby. Bull. Purt. Thelephora 
rubiginosa. Pers. Hook. Bol. auriformis. Bolt. E.) Helvella rubiginosa. 
Dicks. Ray Syn. p. 22. n. 5. who describes it as six inches wide and two 
broad. Common on old pales, &c. near the ground. On an oak door in 
an area at Edgbaston. P. June. 
Aur. nicotia'na. (Bolt.) Annual, thin, flexible, curled and lobed at 
the edge; pale rust-colour, with a yellow border. 
Sowerby 25— Bolt. 174. 
From one to two inches over; nearly flat. Upper surface soft, smooth, but 
uneven. Under surface veined, wrinkled, naked. Bolton. (In drying it 
becomes shrivelled, and assumes the appearance of dried tobacco: whence 
probably the specific name. E.) 
(Tobacco Auricularia. Aur. tabacina. Sowerby. Purt. Thelephora 
ferruginea. Pers. Hook. E.) On dry wood, and decayed branches of 
trees. Feb. 
Aur. papyri'na. (Bull.) Annual, membranaceous, soft, zoned and 
woolly above, smooth underneath, but pitted when old. 
Bull. 402—( Sowerby 349. E.) 
Varies greatly in size according to its age, from one to four or five inches 
over. When young the edges are fringed, when old scolloped and lobed. 
The upper surface is greyish white, the under buff-coloured and cellular. 
Bulliard. 
Mr. Robson, of Darlington, authorizes me to insert this as an English 
species. 
(Buff Auricularia. Aur. papyrina. Sowerby. Purt. Thelephora loevis. 
Pers. E.) On decaying trunks of trees, (and the under side of branches 
of decayed oaks. Sowerby. E.) 
Aur. cortica'lis. (Bull.) Leather-like, thin, smooth, white above, 
pale brown underneath. 
(Resupinate, flesh-colour, or pale-orange, the margin at length involute, 
black and free beneath. Grev. E.) 
