4 LEAFLETS. 



Similarly, a fine sheet of specimens of V. inornata from Iowa, 

 stout, low, and scaberulous, and with the thick obtuse sepals of 

 that species, show a distinct though not very long but stout 

 curved spur, this as completely rounded at its terminus as the 

 organ ia in other northern forms here cited. 



In the Wrong Qenus. 



While examining some Poteniilla bundles lately in the U. S. 

 Herb., I came incidentally to a sheet of specimens labelled P. 

 gracilipes. Piper, n. sp., the first glance at which suggested a 

 Sieversia, and an examination revealed the characters of that 

 genus. It will therefore be called 



Sieversia gracilipes. P. gracilipes. Piper, Bull. Torr. 

 Club xxvii. 393. The species has for its nearest affinity ^. seri- 

 cea, Greene, Pitt. iv. 50. 



Further Segregates from Aster. 



Somewhat late in summer seven years ago, following an old 

 wood road up a mountain side in northern Pennsylvania, I paused 

 for a moment in admiration of some nodding corymbs that in 

 partial shade were peering a little above the rest of the woodland 

 herbage and seemed as if they must be those of some asteraceous 

 plant ; though up to that time I had not seen, or even heard of 

 any asteraceous plant with nodding heads. But on a near ap- 

 proach to the plants I discovered by the unmistakable cut of the 

 foliage that this was what I had known well enough in herba- 

 rium specimens for perhaps forty years, what is called Aster 

 acuminatus. Somewhat later that season I transferred roots of 

 the plant to my garden near Washington, discovering what also 

 had not, and has not until now been mentioned, that the species 

 propagates by tubers rather by stolons. At the end of each long 

 slender subterraneous branch a small organ is formed which 

 exactly resembles a small potato, and from each of these springs 

 a plant for the next year. 



Having studied this type in the living state for another season, 

 I in 1897 labelled all my herbarium sheets of this species 

 OcLEMENA ACUMiKATA, having first noted that neither the 

 achenes nor the pappus are those of the genus Aster, the former 



