330 RvDBERG : 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. liiteus. 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- 

 folms and H. cinereus, and as a rule has less numerous heads than 

 either of them. In the key of the New Manual H. scaposns 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. 

 liiteus and H. araneosiis. 



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, 

 Rydherg & 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, 



