LECANOKA. 193 



On Cupressus Thyoides, North Carolina, Curtis. New Jer- 

 sey, Austin. Massachusetts, Willey. On Taxodium, South 



Carolina, Dr. Mellicliamp. Florida, Austin. This, and the 



next, are our two finest exhibitions of the stock of L. varia. 



24(c). L. orosthea (Sin.); thallus thin, powdery, pale- 

 greenish-sulphur-coloured; apothecia smallish to middling- 

 sized, sessile ; pale-buff, white-pruinose, the disk equalling the 

 entire, at length flexuous thalline margin, or tumid and exclud- 

 ing it. Spores ellipsoid, ^| mic. L. expallens, Ach. L. U. p. 



374; Syn.p. 171. Borr.! in Hook. Br. Fl. 2, p. 181. L. varia, 

 v. coniscea, Nyl. Scand. p. 163. 



Beech and other trunks in New England, Tuckerman. New 

 Jersey, Austin. This lichen is ill-represented by such Euro- 

 pean specimens as I have seen. In Japanese (f. Japonica, MM 

 Obs. Lich. 4, 1. c. p. 173) the apothecia reach 3 mm - in diameter, 

 and the spores ~ mmm., but the plant is entirely the same 

 with the North American ; as that is with that of Europe. 



25. L. Oregana, Tuckerm. ; thallus of coarse, crowded and 

 heaped, now confluent, wart-like areoles, which become some- 

 what stalked at the centre; greenish-yellow; apothecia mid- 

 dling to ample (l mm - 5, -3 mm - wide) ; the rufous, naked disk bor- 

 dered by an incurved, flexuous-crenulate margin. Spores 

 broad- ellipsoid, and rounded, simple, colourless, -J- mic. Sper- 

 matia bowed. 



Rocks, coast of Oregon, Herb. Sprague. The colour and 

 habit of the thallus relate the lichen to L. varia, but the apo- 

 thecia rather recall those of L. subfusca. 



1 1 Spores ellipsoid, 2-4-locular. 



26. L. Brunonis, Tuckerm. ; thallus of minute, glebous, be- 

 coming confluent and squamaceous, and imbricated granules ; 

 tawny-brown, also pallescent; apothecia smallish; disk rusty- 

 brown and blackening, sub-marginate, at length turgid and 

 .excluding the finally crenulate, now concolorous thalline margin. 



Spores ellipsoid-oblong, bilocular, ^ mic. Gen. Lich. p. 116. 



Sandstone and serpentine rocks, Mountains of San Bruno, 

 and on the Oakland hills, California (Bolander), Tuckerman I. c. 

 1872. Apothecia O mm -, 8 to l mm -, 5 wide. 



27. L. athroocarpa (Dub.) Nyl.; thallus very thin, verrucu- 

 13 



