(167 ) 
More distinct certainly appears a form from moist rocks, with granulose 
crust, and small, finally convex and blackening fruit, and slender spores 
(Pennsylvania, Dr. Michener; Vermont, Mr. Frost; New Jersey, Mr. 
Austin; western New York, Mr. Willey) referable, it should fully seem, 
to the v. inundata, Fr. (Bacidia, Koerb. Syst. Secoliga, Stizenb. Bemerk. 
p. 83). This form also occurs on rotten wood in Europe (f. gibberosa, Fr. 
S. V. S. ?) and such specimens, with livid, irregularly tumid apothecia, . 
have been found by me in our mountains. In concluding here this 
review of the large and varied group of lichens which I cannot but 
associate together as states of B. rubella, it is proper to say that the 
smaller forms, comparable especially with v. arceutina, Ach., Nyl. 
(Stizenb. Bemerk. p. 38) have not yet been sufficiently explored, in North 
America. So far however as the examination of such forms, known 
to me—and I am indebted to my friend Mr. Willey for a peculiarly in- 
structive collection, made in southern Massachusetts—extends, there 
is nothing to justify the separation of any of these lichens from the spe- 
cific type we have been considering.——B. stigmatella, Tuckerm.,’ found. 
on trunks in Louisiana (Hale) can also, it is probable, rank no higher than 
a sub-species of B. rubella—B. umbrina (Ach.) (Lecidea, Ach. L. U- 
p. 183, e Nyl. Lich. Scand. p. 209. ZL. holomelena, Floerk., Scheer. Lich. 
Helv. n. 536) is distinguished by its curved (now hooked and now S 
shaped) spores, and occurs, probably very commonly, on stones in walls, 
and also on mortar, and rocks, throughout New England; as also in New 
Jersey (Mr. Austin) and Virginia (Rev. Dr. Curtis). A variety (v. asser- 
culorum, Koerb. Rabenh. Lich. Eur. n. 500) is frequent on old rails and 
pales, on the coast.— B. chlorosticta (Lecidea, Tuck. exs. n. 189; Obs. 
Lich.1. ¢. 4, p. 419) an inhabitant of White Cedar at Hingham, and found 
also by Mr. Ravenel on Pine and Cypress in South Carolina, has recently 
been observed by Mr. Willey to occur not uncommonly, on the southern 
shore of Massachusetts, with sub-stipitate apothecia; suggesting (in this. 
regard only) a comparison with Helocarpon crassipes, Th. Fr. Indications 
of this condition (f. swb-stipitata) are afforded by my other specimens; and. 
the fruit was described at first as ‘at length alittle elevated..—— B. ehlor- 
antha, Tuck. Syn. N. Eng. p. 60, often conspicuous in the contrast offered 
by its lecideoid apothecia to its greenish thallus, is comparable, at least, 
in the colourless hypothecium if in no other respect, with the later-pub- 
lished B. atrogrisea, Delis., but differs in its much smaller and slenderer 
1 Biatora stigmatella: thallo granuloso-farinoso ochroleuco ; apotheciis minu- 
tis (0,3-0,5™™- lat.) sessilibus subplanis e luteolo nigricantibus intus albis, margine 
tenui evanescente. Spore octone, aciculares, graciles, quadriloculares, incolores, 
longit. 0,022-32™™-, crassit. 0,002-3™™- paraphysibus . conglutinatis Louisiana. 
(Hale). Thallus not unlike that of B. guernea; but the granules more minute, 
and paler. Approaches some tropical types (as Lecidea ischnospora, Ny]. Lindig 
Herb. N. Gran. 1. 2773) but is scarcely referable to any one of the minuter Huro- 
pean members of the stock of B. rubella. The reaction with iodine is blue. 
