388 PROCEEDINGS OF THE AMERICAN ACADEMY 



Pennsylvania, and also by itself in New York and Western Massa- 

 chusetts, I have found another, nearly-related plant, sent to me also 

 from Carolina by Dr. Curtis and Mr. Ravenel; the smaller fronds 

 of which pass almost wholly into short, erect lobules, crowned with 

 "almost contiguous," smaller, and paler apothecia, with thin, entire 

 margins, and containing ovoid, or soon oblong-ovoid (ovoid-ellipsoid) 

 diblastish (once-septate) often nebulose (or, apparently, nebulose-mo- 

 noblastish) spores, from once and a half to scarcely more than thrice 

 longer than wide, and rather larger gonimous granules ; this is prob- 

 ably C. pycnocaiyuyyi, Nyl. Syn. p. 115, described from a North Amer- 

 ican specimen in the Paris Museum, and clearly distinguishable, so far 

 as appears, as another link or knot in the knotted line of related forms 

 which we have been considering. C. pycnoccu'pum is not so easily 

 referable to the "genus Synechoblastus" (comp. Koerb. Syst. p. 411) ; 

 but nothing could be less natural than to separate it genericully from 

 the present species, which is clearly a " Synechoblastus." The rela- 

 tion of 0. conglomeratum of Europe to C cyrtaspis is perhaps the 

 same with that of the Euro))ean C. verruciforme to 0. callibotrys ; and 

 the two foreign lichens might be taken, possibly, for reduced forms of 

 tiie American ; G. pycnocarpum, Nyl., being in that case regarded a 

 small form, with simpler spores, of C. cyrtaspis. But I am not ready, 

 at present, to go beyond the distinction of these states, — a distinction 

 based, as above, in each case, upon a large collection of specimens. 



CoLLEMA STELLATUM, sp. nov. : thallo cartikginco firmo viridi- 

 glaucescente e laciniis anguste linearibus convexis parce vageque 

 raraosis ramis subsimplicibus vel demum fastigiato-divisis intricatis 

 subtus pallidis canaliculatis ; apotheciis mediocribus adnatis rufo-fuscis 

 mox convexis marginem thallinum tenuem excludentibus. Sporaj 

 octonae, mediocres, incolores, lato-fusiformes, uniseptattc diara. 2j-3-plo 

 1. demum 3^-plo longiores. — On wet rocks, in beds of mountain rivu- 

 lets. La Perla, island of Cuba, Mr. Wright. Occurs in roundish or 

 irregular, rather dense masses of narrow, very sparingly and irreg- 

 ularly branched, convex lobules, the projecting tips of which are either 

 simple, or at length forked, or even fastigiately divided, greenish, or 

 brownish-green, with more or less of a glaucescent tinge above, and 

 paler and channelled below ; the gonimous granules being connected in 

 necklace-like strings. Apothecia of middling size, convex. Spores in 

 eights, of middling size, broad-fusiform ; once-septate, about thrice, 

 or even thrice and a half, longer than wide. Comparable with C. 



