a 
CocKERELL: NorTH AMERICAN SPECIES OF HyMENoxys 503 
discovered that there is a very good and perfectly constant ana- 
tomical character which separates the two species. 
Similarly, two species of plants may appear to intergrade, 
without actually doing so; but to the best of my knowledge and 
belief the ‘“ species”’ of Richardsoni- and chrysanthemoides-groups 
of Hymenoxys do really intergrade on a quite extensive scale, and 
believing this, it seems best to use a trinomial nomenclature for 
them. This results in calling the common plant of Texas 
Hymenoxys chrysanthemoides multiflora, a name which cannot be 
regarded with much satisfaction. However, I think it will simplify 
matters if in all but formal statements we use only the initial letter 
of the intermediate name of a trinomial, thus Wymenoxys c. multi- 
flora. This is almost like a binomial, and yet serves to distinguish 
races or subspecies from distinctly and sharply defined species. 
. Hymenoxys chrysanthemoides juxta 
ficradenia sp. nov., Greene in herb.* 
The type is a plant collected by O. B. Metcalfe (zo. 778) at 
Mangas Springs, New Mexico, June 9, 1903, alt. 4770 ft. Itisa 
large bushy annual 45 cm. high, with numerous flowers with 
light orange rays. The heads (excl. rays) are about 8 mm. 
diameter. , The outer bracts are pale green; the inner bracts are 
very broad (as in A. Davidson’) and extremely thin laterally. 
The pappus is colorless, about half the length of disc-corolla, with 
a short awn, perhaps one third of its total length. The disc-florets 
are smaller than in H. Davidsoni, but the difference is unimportant. 
This plant is not materially different from subsp. Osterhouti, except 
that it is typically larger, with broader bracts, and the basal part 
of the pappus-scales apparently broader. The two ought perhaps 
to be united, but they are separated geographically, and it is just 
possible that subsp. Osterhouti had an independent origin from 
subsp. multiflora. 
The following plants, not all typical, but I think essentially the 
Same, are referred to this: 
Mexico. — Valley near Chihuahua, April, 1885, C. G. Pringie. 
One of these Pringle plants is very large and robust, but another 
of the same lot is only half the size ; these differences certainly do 
* The specific name applied by Greene is preoccupied in Hymenoxys. 
