OF ARTS AND SCIENCES. 387 



lychnea from his var. candelaris, at the date of the Spicilegium. Arctic 

 America, Richardson (Herb. Hook.) ; approaching the next. 



Var. S. LACiNiosA, Duf. : microphyUina, suborbicularis, lacero-dis- 

 secta, e flava aui-antiaca ; laciniis planis adscendentibus nudis. Parm. 

 farietina, e, Fr. Lichenogr. p. 73. Schser. Spicil. p. 477, & Lich. Helv. 

 n. 381. Koerb. S. L. Germ. p. 91. On trees. New England, very 

 common on the coast, the apothecia smallish and scattered ; and ex- 

 tending to Virginia. South Carolina, Mr. Ravenel. Alabama, 3£r. 

 Peters. Texas, Mr. Wright. 



Var. e. EAMULOSA, Tuckerm. : microphyUina, e virescente flava ; 

 lobis pumilis dispersis laxe decumbentibus semiteretibus dichotomo- 

 ramulosis ; apotheciis concoloribus. Report on Lich. U. S. N. Pacif. 

 Expl. Exp. ined. On bushes, Mare Island, California, 3fr. Wright. 

 The lobes pass in this curious variety into subterete branchlets. 

 Spores as in the species. 



Var. f. FiNMARKiCA, Ach. : microphyUina, flavo-aurantiaca ; lobis 

 erectis laceris lacunosis complicatis apice demum multifido-ramulosis. 

 Lecanora candelaria, var. Finmarhica, Ach. Syn. p. 192. P. parietina, 

 var. pygmcea, Fr. Lichenogr. p. 73 ; Moug. & Nestl. Cr. Vog. n. 743, d. 

 Rocks, Behring's Straits, Mr. Wright. An extreme form, referred to 

 Borrera, according to Fries, 1. c, by Bory. 



3. P. CANDELARIA (Ach.), Nyl. Prodr. Gall. p. 60. Lecanora, Ach. 

 Lichenogr. p. 416, a; Syn. p. 192, a. Moug. & Nestl. Cr. Vog. n. 743, 

 a. Parmelia parietina, i. concolor, Fr. Lichenogr. p. 73 ; Tuckerm. 

 Synops. Lich. N. E. &c., p. 31. P. parietina, e. candelaris, Schser. 

 Spicil. p. 477, & Lich. Helv. n. 382, pr. p. Candelaria vulgaris, 

 Massal., Koerb. S. L. G. p. 120. On trees. Arctic America, Rich- 

 ardson (Hook, in Frankl. Narr. p. 760). Pennsylvania, Muhl. Catal. 

 New York, Halsey. New England. Ohio (infertile), Dr. Hay den. 

 Louisiana (infertile). Dr. Hale. Thallus spreading irregularly, green- 

 ish-yellow ; the crowded, minute, dissected squamules powdery at the 

 margin, and often passing into a subgranulose crust ; apothecia smallish, 

 of the same color. Spores smaller than those of the preceding species, 

 and the spore-sacs always containing many (20) instead of eight spores, 

 as in that. Distinguishable from the small-lobed varieties of P. parie- 

 tina, but the important character of the Lichen is the microscopical 

 one of polysporous spore-sacs ; the value of which, in the system, has 

 probably been over-estimated by those writers who have sought to 

 found a generical distinction upon it. 



