408 MR, G. BENTHAM ON COMPOSITE. 
been in a great measure technically distinguished by slight struc- 
tural differences, and which in other respects generally correspond 
to the Asteroid sections or diverging genera of the same respective 
regions, Thus we have the Asiatic and North-American Boltonia, 
the Asiatic Heteropappus, and the N.-American Zownsendia, 
Monoptilon, and Psilactis diflering from the typical Asters of the 
same regions in scarcely any thing but the pappus. The Californian 
Corethrogyne differs rather more in the style and other characters, 
and may possibly have other connexions.  Zremiastrum is nearer 
to Erigeron. The Andine Hinterhubera, with remarkable irregular 
corollas to the external female florets, approaches in other respects 
the South-American Vittadinia. The same peculiarity in the 
corollas characterizes also the genus Lessingia, referred, perhaps 
erroneously, to the homochromous subtribe, and also West- 
American, though limited to the northern hemisphere. In South 
Africa, Amellus, characterized by the pales of the receptacle, and 
Mairia and Gymnostephium, by the plumose or reduced pappus, 
partake in other respects of the Asteroid form characteristic of 
that region, that of Felicia; so also does the monotypic Charieis, 
which in some respects connects the tribe with the Senecionidex. 
Finally, three small genera, Distasis, Chetopappa, and Minuria, the 
two former from W. North America, the latter from Australia, have 
an abnormal pappus nearly similar in the three, but not much else 
in common, except as members of the heterochromous group of 
Asteroidee ; but each will be found to be nearly allied to Asteroid 
genera of its own country, Distasis being comparable with the 
section Orthomeris of Aster, Minuria approaching in many respects 
the Australian Calotis. 
3. The Bellis type has a somewhat unusual geographical dis- 
tribution. It belongs to extratropical western regions of the Old 
World and to Australia, with one or two representatives in North 
America; but its principal seat is in Australia. Indeed the 
European and North-African Bellis, with four or five species, the 
American Astranthium, one, or perhaps two, species, the Azorean 
Seubertia, one species, and the South-African Steirodiscus, two 
species, are but very imperfectly distinguished as genera from the 
Australian Brachycome, which has forty species; and amongst 
slightly diverging genera the European .Bellium has three 
species, the North-American (Mexican) Keerlia two, the South- 
African Garuleum three, whilst the Australian Calotís has fifteen. 
Ail these genera may be regarded as more, nearly allied to each 
