i 7 
Vol. VI, No. 10.) Buxtetin or THE TorREY Botanical Cius. [New York, Oct., 1875. 
§ 55. Lichens of Kerguelen’s Land. 
The Lichens of this island were first observed by Dr. J. D. 
Hooker, during the voyage of the Erebus and Terror (1839-1843) 
and his specimens were studied by Dr. Thomas Taylor ; according 
to whose reckoning (Lich. Antarct. in Lond. Journ. Bot., 3, p. 684) 
the whole number of species was sixteen. Dr. Taylor’s herbarium 
is now included in that of the Boston Society of Natural History, 
but contains unfortunately very little to illustrate his Kerguelen 
determinations ; and the lack of microscopical analysis makes it 
difficult therefore to avail ourselves of his work. © 
The collection now before me, made by Dr. Kidder, naturalist of 
the U. 8. Transit Expedition of the present year contains more 
or less satisfactory evidence of as many as twenty species, though 
not all of them determinable. Adding the three found in the Taylor 
herbarium, the whole number, according to this reckoning, will be 
twenty-three. And as eight or nine others are found in Taylor’s 
list, there is no doubt that this little Lichen-Flora is larger than it 
was taken to be. 
-— 1, Usneasulphurea (Mill.) Th. Fr. (U. melaxantha, Ach.)— 
Rocks—According to Taylor the place of this well known antarctic 
lichen is taken in Kerguelen’s Land by another, the U. Taylori, J. 
D. Hook., called ‘‘ handsomest of the vegetable products of this the 
island of Desolation.” But this last, though received by Nylander 
(Neuropogon Taylori, Nyl. Syn., 1, p. 273) is hardly well discrimi- 
nated from the older species by the description of either author ; 
and I cannot separate any of the numerous specimens before me 
trom others got, during the same voyage, at the Falkland Islands 
(Herb. Hook.) which Taylor and Nylander appear to have re- 
ferred to U. melaxantha.. 
2. Pannaria Taylori (sp. nova) thallo foliaceo cartilagineo 
appresso luteo-fulvo, lobis apice rotundatis crenatis incisisque, sub- 
tus nigris hypothallo obsolescente ; apotheciis (demum plusquam 
2 millim. latis) lecanorinis sessilibus, margine crasso ruguloso, 
disco plano fuscescente. Spore ellipsoidew, simplices, incolores, 
0,016-21™™ long, 0,009-11™": crass.—Rocks, Hooker (Herb. Tay- 
lor.) —Medullary layer of compact, elongated cells, Collugonidia 
0,002-5"™™ in diameter, solitary, or in chains of 2-5. The specimen 
is rather more than an inch across. It occurs with Placodium 
elegans, but wrapped apart, in Dr. Taylor’s collection. 
3. Pannaria glaucella (sp. nova) thallo foliaceo cartilagineo 
arcte appresso glauco-cinerascente, subtus pallido hypothallo 
obsoleto, lobis radiantibus subintegris ; apotheciis (0™™, 006-8 latis) 
lecanorinis adnatis, margine integro demisso, disco dein convexo 
fusco-nigro. Spore immature.—Rocks.—Specimens scarcely half 
an inch across. Elongated cells of medullary layer compact. 
Collogonidia 0,004-9™ in diameter, in chains often of 4-10, 
4. Placodium elegans, (Link.) DC.—Rocks, Hooker, (Herb. 
Tayl.)—Spores 0,010-17"™" long, and 0,007-9"" thick. Called 
Lecanora murorum by Dr. Taylor (herb.) but not reckoned in his 
Lichenes Antarct. 1. ¢. Itis perhaps better referable as above. 
5. Placodium bicolor (sp. nova) thallo  ecrustaceo-adnato 
