. A synopsis of the North American lichens [microform] : Part I, comprising the parmeliacei, cladoniei, and coenogoniei. Lichens; Lichens. 146 COLLEMA. ^»W ; !,: f; !:!. (Willep), Tuckerman Gen. 1872. Also on Red Cedar at Cam- b: '.dge. On the same bark in New Jersey, Austin. Like the somewhat similar C. microphyllum, this lichen, which, as represented in Schjerer's excellent specimens {Lich. Helv. n. 416), corresponds with the definition of Acharius (C. furvum V. verruciformc, Ach. Syn. p. 323) in exhibitim? dense, roimded, little cushions, which gave occasion to its name, T), at lea
. A synopsis of the North American lichens [microform] : Part I, comprising the parmeliacei, cladoniei, and coenogoniei. Lichens; Lichens. 146 COLLEMA. ^»W ; !,: f; !:!. (Willep), Tuckerman Gen. 1872. Also on Red Cedar at Cam- b: '.dge. On the same bark in New Jersey, Austin. Like the somewhat similar C. microphyllum, this lichen, which, as represented in Schjerer's excellent specimens {Lich. Helv. n. 416), corresponds with the definition of Acharius (C. furvum V. verruciformc, Ach. Syn. p. 323) in exhibitim? dense, roimded, little cushions, which gave occasion to its name, T), at least here, into an effuse and scurfy form, not otherwiL ^ dif- fering. And this ends finally in an almost granulosc ?nd crus- taceous one, from which C. quadratum, Lahm (Koerb. Parerg. p. 411), appears to be scarcely separable. C. callibotrys, with its well-developed, foUaceous thallus, offers evidently the other extreme of this series of lichens, so manifestly connected by the spores. 8. C. aggregatum, Nyl.; thallus of middling size, orbicular, membranaceous - cartilagineous, sub - monophyllous, lobate - pli- cate and fenestrate, marked with conspicuous, anastomosing, rugose-granulate ridges; from bright- becoming blackish-green; beneath pale; apotheeia of middling size, somewhat elevated, flattish, mostly in bunches on the ridges; the disk reddish, the margin sub-entire. Spores long-fusiform, plurilocular, decol- orate, ^ mic. Nyl. Syn. I,p. 115. Synechobl,Koerb. Parerg. p. 419. 6. impUcatum; scarcely differing but in now larger apothe- eia, and stouter spores, ^ mic. C. impUcatum, Nyl. Prodr. N. Gran. p. 2; <S;in herb. Lind^g, n. 749. c. glaucqphthalmum; like the last, but the apotheeia white- pruinose. Spores ^ mic. C. glaucophthalmum, Nyl. Syn. 1, p. 114; Prodr. N. Gran. p. 2; S in herb. Lindig, n. 813. Trees, b, Mexico, Nylander, 1863; as also in Cuba, Wright; Venezuela, Wagner; Fendler; and New Granada, Lindig. c, Mexico, Nylander Syn.,^1858. New Granada, Lindig. These
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