CRYPTOGAMIA. FUNGI. Uredo. 
373 
(U. thlas'pi. Composed as it were of the scarf-skin, or cuticle, of the 
plant, covering a fine white downy substance, which contains a 
very subtile powder. 
Sowerby 340. 
Growing in long oval white patches upon the seed-bearing heads of Thlaspi 
Bursa-pastor is. 
White Blast. U. Thlaspi. Sowerby. Port. U. Candida. Pers. Hook. 
Reticularia Thlaspi. Relh. Not unfrequent about London and Norwich, 
both in autumn and spring. Sowerby. On the flowering stems of cauli¬ 
flower. Purt. E.) 
(U. ai/rea. Seeds large for the size of the plant; and particularly 
brilliant, having always a bright golden lustre. The cover is 
simple, and partakes of the same splendour, though in a less 
degree. 
Soiverby 320. 
(Golden Blast. Mr. Purton seems to be of opinion that this parasite is 
scarcely to be distinguished from some other species. E.) Found on 
Osmunda crispa , in small oval patches. Sowerby. E.)* 
* (Others have been observed upon the leaves of the Rose, Spirtea, &c. see Sowerby’s 
Fungi, tab. 393. f. 7? 3, 9. and Grev. Scot. Crypt. 19. In some instances equally, 
or yet more, minute parasitics are found even upon their own congeners, as Sphceria 
sanguined upon Sph. decorticans , and thus, in series almost endless, 
Gradual, from these what numerous kinds descend, 
Evading even the microscopic eye 1” 
