472 CocKERELL: NortTH AMERICAN SPECIES OF HYMENOXYS 
clined to attribute these peculiarities to the carelessness of the 
artist (although the figures seem carefully drawn), were it not that 
an inscription at the corner of the plate indicates that Sir William 
Hooker himself made the drawings. * 
“ Hymenoxys Richardsoni pumila (Greene) 
Picratenia pumila Greene, Pittonia, 3: 271. 189%. 
Professor Aven Nelson considers this a synonym of his P. 
ligulaeflora, but Dr. Greene (in litt.) states that it has never seemed 
to him the same. Dr. Greene has very kindly allowed me to 
study his type specimens, and I think the plant should be separated 
from subsp. Hgulaeflora.t The typical specimens of the two 
-plants look very different. P. igulacflora being taller, with straight 
erect stems, and greener foliage, exhibiting characters usually 
regarded as mesophytic. P. pumila, on the other hand, is a 
genuine xerophyte, with short stems, inclined to spread outwards, 
and pale wiry foliage. P. igulaeflora, as its author states, is a 
plant of the open plains in Wyoming; the type of P. pusnila came 
from Wyoming, but much further west, and as I recognize the 
plant it is alpine and northern. The following are referred to 17. 
Richardsoni pumila : ; 
Wyomine. — Rock Creek, Greene. 
Cotorapo. — North Park, Larimer Co., July 13, 1896, G. E. 
Osterhout. This has the foliage and aspect of subsp. pela, but 
is taller (about g cm.); receptacle quite high, higher than broad, 
rounded at end; achenes very red; pales of pappus about % 
length of disc-corollas. 
have now examined the type material of Picradenia Richardsoni at Kew; it 
is abundant (covering two sheets) and in excellent condition. To my surprise the 
peculiarities noticed in the original figure do not exist. ‘The inner and outer bracts are 
not alike; the inner are strongly fimbriate as usual in the group, the outer are united 
quite high up. The pappus-scales are ferruginous, and are long-pointed, reaching far 
beyond the middle of the corollas. Large, well-developed heads are as much as 31 
mm. across, including the rays. In view of all this, I do not think it is practicable to 
separate macrantha from Richardsont. ee 
7 Dr. Greene says the type is from Western Wyoming. Professor Nelson writes, 
‘*the type of P. pumila was the Laramie Plains near Rock Creek, and not far from the 
type locality of P. ligulaeflora.”’ Are there two Rock Creeks? A specimen which 
Professor Nelson had labeled prmi~a is not that form. 
ee ned Sa 
