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PLcell.aph. 2.THALASSIOPHYT^. 50. Carrod. 351
Salt marshes and the sea-shore.
Thallus slippery, flaccid, 2 inches high.
XXVI. 51. NOSTOC. Paracelsus. Nosloch.
Thallus not uniform or globular, vesicular, greenish, gelatinous;
sporidia globose, in curved, beadlike threads.
This genus has much affinity with oscillatoi'ia, but the
threads of that genus radiate, and have no integument
over them.
1. Nostoc commune. Comynonnostocfi,
Terrestrial ; thallus not uniform, solid, plated, wavey;
threads loosely interwoven.
Ulva terrestris pinguis et fugax, Dillen in Rait Syn. 64, 11.
Liiickia (errestris gelatinosa membianacea vulgatissima, ex pallida et
Yirescente fulva, Micheli Nov, Gen. PI. 12(>, 1.
Tremella Nostoc, Lin. S. P. 1625; Engl. Bot. 461.
Fucus Tremella Nostoc, Gmel. Hist. Fiic. 222.
Nostoc commune, Vaucher, 222.
Nostoc vulgare, IVa/il. Ft. Lapp. 992.
Linckia terrestri?. Roth Cat. 3, 345.
Alcyonidium Nostoc, Lamouroux Thai. Ess. 71.
Star-shoot. Star-slough.
Damp, shady, gravelly places; summer and autumn.
Thallus lobed, 2 or o inches in diameter; pale green,
mostly seen after rain.
2. Nostoc verrucosum. Warty nostoch.
Thallus rather globose, rather leatherlike, hollow,
plaited ; threads very closely interwoven.
Linckia paliistris gelalinosa, saxis adnascens, ex obscure fulva, et coBcava
vesicam referens, Micheli Nov. Gen. PL 126,2.
Nostoc verrucosum, Vaucher, 225.
Tremella flnviatilis, Dillen Mus. 10.
Tremella verrucosa, Lin. S. P. 1625 ; Hudson Fl. Angl, 565.
Tremella utricalata, Huds. Fl. Angl.56A}
F'.icus Tremella verrucosa, G/ne^ F«c. 227.
Linckia verrucosa, Roth Cat. 3, 345.
Rocks and stones in rivers, often floating.
Thalli aggregated ; when young solid, smooth, opake,
when old, hollow, yellowish green.
3. Nostoc muscorum,. Moss nostoch.
Thallus 2-formed, napillose, tuberculate, rather leather-
like.
Nostoc muscorum, Agardh Syn. 132.
Tremella intestinalis,"i^/. Dan. 885.
Damp mossy places.
Blackish green, harder and smaller than n. commune.