44 PITTONIA. 
which, if I mistake not, has its largest development along 3 
the Andes of South America, particularly in Chili, where 
very many species have been published by Dr. Philippi, a 
under Pyrrocoma. DK 
—— 
Some four other species of the homochromous group above: 
referred to, gathered in from the rather widely scattered posi- ' 
tions which they hold in Gray's arrangement of the species, q 
are so much at agreement in certain important characters _ 
that I trust they may, in the eyes of some other synanthe- 
rologists appear, as they do clearly appear to me, to form a - 
natural genus. : 
One of these is a decidedly rare plant, now for some time | 
received under Aplopappus, the Stenotus multicaulis of Nut- 
tall. In my own revision of the Stenotus series, I was unable 
to include it in that genus because of its rigid scanty brown- _ 
ish pappus, its peculiar involucre and habit. And N uttall 
himself, the discoverer of the plant, appears to have hesi- 
tated between referring it to Stenotus, or taking it as the type 
of a distinct genus. . 
Very near to this is the Bigelovia Engelmanni of Gray; 
for, though its heads are rayless, the involucre, the corolla, 
style-tips, pappus, and even the entire leaves are those of the. 
genus here to be proposed, and not those of any genuine 
* Bigelovia” according to Gray, that author himself hav- 
ing been obliged by these characters to place it in a sub- 
section apart from all the other members of his genus. Had | 
it only possessed ray-flowers, he must undoubtedly have 
placed it in Aplopappus, and near his A. multicaulis. 
Next of kin to the species last mentioned has been pub- 
lished as a variety Wardi of Gray's Aloppappus Fremonti ; 
but this isa very distinct species even in habit, as well as 
character, and serves to connect with this generic group the 
larger, coarser plant which has borne the names Aplopappus 
Fremonti and Pyrrocoma foliosa. ; 
