(14) 
makes any important difference in this respect certainly unlikely. Herein 
also Evernia vulpina, as exhibited especially in its finest known condition, 
on our Pacific coast, conspicuously illustrates the transition of its own 
generic type into Usnea. 
VII.—ALECTORIA (Ach.) Nyl. 
Nyl. Syn. 1, p. 277, t. 8, f. 16-18, 20-21. Anz. Catal. p.9. Tuckerm. Lich. 
Calif. p.18. Cornicularie spp., et Alectorie spp., Ach. L. U. pp. 120, 
124; Syn. pp. 291, 299. Cornicularie spp., et Everniz spp., Eschw. 
Syst. pp. 20, 23. Everniz spp., Fr. 8. 0. V. p. 236; L. E. p.20. Tuck- 
erm. Syn. Lich. N. Eng. p. 10. Parmelie spp., Mey. Entwick. p. 335. 
Wallr. Fl. Crypt. Germ. pp. 530, 540. Scheer. Spicil. p. 499. Cornicu- 
larie spp., Scher. Enum.p.5. Bryopogon, Koerb. Syst., p.5. Schwend. 
Untersuch. 1. c. 2, p. 144, t. 3, f 1-29. Bryopogon, Alectorie sp., et Cor- 
nicularie sp., Koerb. Parerg. p.4. Bryopogon, Alectoria, Corniculariz 
sp., et Oropogon, Th. Fr. Gen. p. 48. Alectoria et Oropogon, Stizenb. 
Beitr. 1. c. p. 176. 
Apothecia scutelleformia, innato-sessilia, disco thallo discolore. 
Spore ellipsoidez, simplices 1. rarissime muriformi-multiloculares, 
fuscescentes 1. sepius decolores. Spermatia bacillaria, apicem ver- 
sus utrumque fusiformi-incrassata; sterigmatibus pauci-articulatis. 
Thallus fruticulosus filamentosusve, teres, undique similaris, intus 
stuppeus |. subinanis. 
The lichens brought together in Alectoria, Nyl., though sufficiently 
congruous in habit, and recognized as congenerical by Fries and by 
Scherer, and, in the important respect of the anatomy of the thallus, by 
Schwendener, appear yet to be representative of distinct spore-types, and 
have thus come to be considered as constituting, in the opinion of some 
recent lichenists, no less than three genera :—Bryopogon, Mass., Koerb., 
emended as respects the limitation of the spores in size by Th. Fries, 
including the species with colourless spores, or of the type of A. jubata ; 
Alectoria, De Not., those with brown spores of the type of A. ochroleuca ; 
and finally Oropogon, Th. Fr., represented only by the South American 
A. Loxensis, in which the brown spore attains to its final organization. 
It appears however scarcely open to question, with those who recognize 
(as we must here) that Acoliwm includes species with » simple, » bilocu- 
lar, Dif we accept A. Javanicum, quadrilocular, and lastly, in Europe at 
least, muriform-plurilocular spores, or who recognize simple, bilocular, and 
quadrilocular spores in Calicium, that the spores of Oropogon offer no 
greater difference from those of Alectoria, De Not., than those of Acolium 
Notarisii from those of A. Bolanderi; it being understood that the last- 
named lichen is in every respect as strictly congenerical with .4. Califor- 
nicum, as is Calicium paroicum with the analogously differenced C. cory- 
