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396 SO.PIacynth. 3. HOMOTHALAME^. PLcell.apL
Lichen niger, Hudson Fl. Angl. 524; Engl, Bot. 1161.
Lecidea corallinoides, Florke, Berl. Mag. 1809, 5.
Lecidea nigra, Achar, Meth. Lich. 76.
Stereocaulon corallinoides, Hoffm. FL Germ. 129.
Collema nigrum, Achar. Lichen. Uniu. 628.
On rocks, espcially limestone.
11. 81.ENCHYL1UM. Acharius. Enchjie.
Thallus plaited tilewise, nearly orbicular, composed of
minute lobes, when moist turgid, very thick.
1. Enchyllum micropliyllum. Small-leaved enchyle.
Thallus slightly spreading, tilewise, blackish green; lobes
thick, minute, crowded, deeply crenate; apolhecia sessile,
crowded, pitchershape, hollow, colour of the thallus, edge
not in the least cut, contracted.
Collema microphyllum, Achar. Lich. Univ. 630.
On the bark of old trees.
2. EvcJn/lium fras^rnns. Sweet-scented ejichyle.
Thallus nearly orbicular ; lobes round, expanded, naked,
edge thick, crenate, ascending; apothecia scattered, minute,
hollow, dark yellowish brown ; edge swollen outwardly,
uneven.
Lichen fragrans, Engl, Bot. 19, 12.
Trujiks of trees.
When moistened has a sweet odour.
3. Enchylium crispum. Crisp enchyle.
Thallus nearly orbicular; central lobes rather upright,
granular; lobes of the circumference depressed, large,
blunt, crenate; apothecia scattered, slightly concave, reddish,
edfife granular.
Lichenoides gelatinosum atrovirens, crispum et rugosum, 2)27/en iWMSc.
139.
Lichen crispus, Engl. Bot. S34.
Lichen pulposus ;S, Bernh.in Schrad.Journ. 1799.
Parmelia crispa, Achar. Meth. Lich. 254.
Collema crispum, Hoffm. Fl. Germ. 100.
Collema crenulatum, Hoffm. Fl. Germ. 103.
Collema glaucescens, Hoffm, Fl. Germ. 105.
Collema pulposum crispum, Achar, Lich. Univ. 652,
On the ground among mosses, and on mountains.
4. Enchylium turgidum. Swollen enchyle.
Thallus irregularly expanded, depressed, slightly lobed
and tiledlike; lobes raised, thick, wartlike, wrinkled, gra-