2 
14 b. Solorina saccata , Ach., var. limbala, Seiner.—On the 
earth among Algfe, Canon Creek, Idaho. 
15. Placodium cladodes , Tuckerm.—Teton Mountains. 
Infertile. 
16. Placodium coralloides, Tuckerm.—Teton Canon. 
17. Placodium murorum, (Hoffm.,) DC.—The specimens 
are numerous. 
17 a. Placodium murorum DC., var. citrinum , (Ach.) 
Nyl.—With the above, but less abundant. 
18. Placodium callojpismum , Ach.—The specimens are 
numerous. 
19. Placodiumpeliophyllum, Tuckerm., (Genera, p. 108.) 
Tkallus crustaceous and white at the center, at the circumfer¬ 
ence laciniate, linear multifid, glaucous fuscescent. Apothe- 
cia central, crowded, the margin entire, disk plane, white 
pruinose, cracked. Paraphyses articulate. Hymenial gela¬ 
tine blue with iodine. Spores polar-bilocular, .016-21 mm. 
long, .008-10 mm. wide. On rocks, Fort Ellis, Montana. 
The specimens are scanty, but I venture to refer it as above, 
though I have only seen the Trief description cited. 
20. Placodium variable, (Pers.), Nyl. (?)—Thallus tar- 
tareous, rimose areolate, whitish. Apothecia sessile, the disk 
black. Spores polar-bilocular, .015-18 mm. long, .007-9 
mm. wide. 
The single fragment is very small, and hardly sufficient for 
satisfactory determination. 
21. Placodium vitellinum, (Ehrh.), Ach.—On dead wood. 
22. Placodium luleo-?ni?iium, Tuckerm. Lich. Calif., p. 
18. A small Placodium growing among mosses, which seems 
referable here. 
23. Placodium fusco-luleum, Nyl. ( ?)—A few scattered 
apothecia with a plane ferrugineous disk, on rocks among 
other lichens, not sufficient for determination. 
24. Lecanorct rubina, Ach., var. peltata, DC. 
24a. Lecanora rubina , Ach., var. opaca , Ach.—The speci¬ 
mens of both these varieties abundant. 
25. Lecanora muralis, (Schreb.), Schrer. 
