222 THE PLANT WORLD 



canescens Nutt., which here grew in patches, Zygaden^is elegans Pursh, 

 Lithosperrmun canescens Lehni., Pidsatilla hirsutissima (Pursh) Britton, 

 which was past the fruiting stage, and Astragalus adsiirgens Pall, grow- 

 ing in clumps which were two feet in diameter. Many clumps of the last 

 were noted. The writer finds no record of Astragalus adsurgens Pall, hav- 

 ing been previously collected in Iowa. The species ranges on the prairies 

 of the States to the north and west and northwestward to British Colum- 

 bia. The finding of the station on Ocheyedan mound makes an interest- 

 ing extension of the known range of the species. The frequent species 

 were Sisyrinchium angustifolium Mill., Equisetum laevigatum A. Br., and 

 Astragalus caryocarpus Ker. growing in large patches. Stipa spartea 

 Trin., Psoralea esculenta Pursh, Panicjun leibergii Scribner, and Rosa 

 arkansana Porter were infrequent. Only one specimen of Acerates 

 viridi flora EH. and one of Oxytropis lamberti Pursh were picked up. 

 Near the base of the hill were collected Brassica nigra (L-) Koch., 

 Tradescantia virginica L., Phlox pilosa L-, and Zi2ia cordata DC. In an 

 abandoned gravel pit it was found that many of the above-mentioned 

 plants had crowded into the open space along with Lepidium virginicum. 

 L., Hordeum jubatuni\i., Oenothera serrulata Nutt., and Salsola tragus Li. 



The flora of the south side comprised as common species Amorpha 

 canescens Nutt. and Coreopsis palm ata Nutt. which had not as yet reached 

 the flowering stage. The frequent species were Castilleja sessiliflora 

 Pursh, Stipa spartea Trin., Panicmn leibergii Scribner, Oenothera serru- 

 lata Nutt., which was frequent in spots, Aster sericeusYeni., Afitennaria, 

 the prairie species, probably campestris Rydberg, and Sisyrinchium 

 ajigustifolium Mill. The grass Koeleria cristata Pers. was infrequent, as 

 well SiS Lithosperniu?n canescens Lehm., Equisetum laevigatum. h,. Br., and 

 Echi7iacea angustifolia DC. Zygadenus elegans Pursh was conspicuous 

 by its absence. 



At the southeast end of the hill there was found two large puff balls, 

 six inches in diameter, large specimens of apparently Calvatia cyathi- 

 formis (Bosc.) Morgan. The spores in one specimen were partly blown 

 away, the cup-shaped persistent base constituting the bulk of the re- 

 mains. 



The small part of the mound has its flora scattered throughout its 

 extent, there apparently being no preference for position. Common 

 species were Stipa spartea Trin., Aster sericeusY^ni., Amorpha canescens 

 Nutt. , and Coreopsis palmata Nutt. The frequent species were Aster pate?is 

 Ait. and Rosa arkansana Porter, while the infrequent ones were Lygodesmia 

 juncea Don, Koeleria cristata Pers., Psoralea esculenta Pursh, and Litho- 

 spermum canescens Lehm. 



At the foot of the main mound along by the marsh the following 

 species were common : Psoralea argophylla Pursh, Vicia americana 



