330 RYDBERG: Rocky MOUNTAIN FLORA 
HYMENOPAPPUS 
Professor Nelson divides this genus into two groups: one with 
stems leafy throughout, mostly corymbosely branched and with 
numerous heads; the other with stems leafy below, the leaves re- 
duced upwards, few or wanting, heads not numerous. In the first 
group, he places Hymenopappus tenuifolius and H. luteus. The 
first of these two always has a leafy stem and many heads, but 
in H. luteus the stem is not more leafy than it often is in H. fili- 
folius and H. cinereus, and as a rule has less numerous heads than 
either of them. Inthe key of the New Manual H. scaposus is dis- 
tinguished from the rest by the following character: “‘stem scapose, 
less than 2 dm. high.’”’ These characters we often find in both H. 
luteus and H. araneosus. 
Hymenopappus cinereus Rydb. and H. ochroleucus Greene are 
made synonyms of H. araneosus. I take the two first to be the 
same, but think that the last one should be kept distinct. It is 
characterized by the denser, more permanent tomentum, a tuft of 
dense matted white tomentum on the caudex, and achenes with 
silky and more appressed pubescence. This is characteristic of 
neither H. cinereus nor H. ochroleucus. Hymenopappus parvulus 
Greene is made a synonym of H. scaposus, but it has a smaller head, 
no matted white tomentum on the caudex and subcylindraceous 
corolla-throat. The last character would associate it with H 
macroglottis, H. lugens, and-H. eriopodus, but its corollas are 
scarcely more than half the size of those of the other species. H. 
scaposus is not found in the region, as limited in the New Manual. 
Hymenopappus lugens Greene is to be added to the region, 
having been collected above Marysvale, Utah, July 21, 1905, 
Rydberg & Carlton 7049, and H. eriopodus A. Nels., found in 
Diamond Valley, May 19, 1902, Goodding 880, and at Springdale, 
May 14, 1894, Jones 5261. The last has much broader segments 
to the leaves than the type and resembles H. tomentosus in habit, 
but has the corolla of H. eriopodus. It may prove to be distinct. 
OTHAKE 
In describing Polypteris maxima, Dr. J. K. Small overlooked 
the fact that the original Palafoxia Hookeriana was based on Drum- 
mond’s plant, which he referred to Polypteris maxima. Mr. Bush, 
