OBSERVATIONS ON THE COMPOSITZ. 91 
From genuine CHONDROPHORA most of those far-wastern 
shrubs that have been associated with it in the writings of 
Gray differ rather widely. It is an herb, and they are 
shrubs. It has a deeply lobed corolla, the lobes strongly 
recurved or reflexed; few or none of the western shrubs 
have that character. It has subulate included style-tips; 
they have linear more or less conspicuously exserted style- 
tips. Its achenes are glabrous or nearly so, and faintly 
10-striate; theirs are much more elongated, more or less 
hairy, with a few angles and no striz. These are the points 
of contrast between CHONDROPHORA, and those western 
shrubs not heretofore excluded by me from Gray’s “ Bige- 
lovia.” The single plant which is nearer than any other to 
true CHONDROPHORA, has been received by most authors as a 
species of Solidago, that is, Petradoria pumila (see p. 13 
preceding). This has substantially the same characters of 
flower and fruit, the achenes being more distinctly 10-striate; 
but itis not an herb. Nevertheless the joining of this type 
to CHONDROPHORA would be doing less violence to real 
affinities than is done by Gray and others who have com- 
bined with it Nuttall’s Chrysothamnus. 
An affinity between CHonDROoPHORA and EHuthamia was 
more than once taken note of by Gray; but this relation is 
not so intimate; for the achenes in Huthamia are turbinate 
and silky. 
The species of CHonpropHoRA, therefore, unless Petradoria 
be joined to it, seem to me to be two only. 
1. ©. nupara, Britton, Mem. Torr. Club, v. 317 (1894). 
Chrysocoma nudata, Michx. Fl. ii. 101 (1803). Bigelovia 
nudata, DC. Prodr. v. 329 (1836). 
2. C. virgata. Chrysocoma virgata, Nutt. Gen. ii. 136 
(1818). Bigelovia nudata, var. virgata, T. & G. FI. ii. 232 
(1842). Chondrophora nudata, var. virgata, Britton, 1. c. 
The greater leafiness of this plant, its very narrow foliage, 
as well as its virgate inflorescence, convince me that its true 
rank is that of a species. 
