DISTRIBUTION OF TRIBES. 479 
aivision into three or more very artificial genera. Taking more 
natural, though not always very well-defined, sections, Achyro- 
phorus and Serioloides are common to the New and the Old 
World, Oreophila is exclusively Andine, Amblachenium is a single 
Siberian species, Euhypocheris and Porcellites are the two. cosmo- 
politan species, Seriola, Metabasis, Robertia, and Arachnites form a 
small group exclusively Mediterranean. 
Malacothrix, about nine species, and the monotypic Anisocoma 
allied to it are Californian genera, in some respects allied to 
Hypocheris and perhaps to Hieracium, but forming a very distinct 
local group. 
Tragopogon, about thirty species, and Scorzonera, about one 
hundred, are widely distributed over the temperate and even sub- 
tropical regions of the northern hemisphere in the Old World, with 
their chief seat again in the Mediterranean region, to which belong 
also a few small local genera slightly diverging from them :— Uro- 
spermum, two species, of which one reappears in South Africa, but 
probably as a rather old colonist ; Epilasia, five species or varie- 
ties, from the Persian region; and Zouwrneuxia, one species, from 
the deserts of South Algeria. None of these genera extends to 
America; but the group or subtribe may be said to be in some 
measure represented in North-west Ameriea and the Mexican 
region by Lygodesmia, five or six species, Stephanomeria, about 
eight species, Scorzonella, two or three species, and the monotypic 
Pinaropappus, and in extratropieal South Ameriea by the mono- 
typie Picrosia. 
Tolpis, fifteen to eighteen species, belongs to the Mediterranean 
region, more especially the western portion, and extends to the 
Canary and Azores Islands, where it has established endemic spe- 
cies; the monotypic Spanish Hispidella is also allied toit ; and no 
nearly related form is known from any distant region. 
Hyoseris, four species, is also peculiar to the Mediterranean 
region and nearly surrounding districts. Arnoseris, a single spe- 
cies diverging from Hyoseris, is more generally spread over 
Europe, especially the western districts, and is a ready colonist 
in Australia and some other countries. These genera may be said 
to be in some measure represented in America by Microseris, 
twelve species, Krigia, four or five species, and the monotypic 
Phalacroseris, all northern and chiefly north-western, except one 
species of Microseris, which, from extratropical South America, 
extends to Australasia. 
LINN. JOURN.—BOTANY, VOL, XIII. 2M 
