70 THE AMERICAN BOTANIST 



ed that they held ripened stigmas. The green disk becomes 

 yellow and each is tipped with two styles and two stigmas 

 making the flower cluster quite as attractive as do the previous 

 yellow corollas. A motley company of two-winged insects 

 were feasting there with wasps, especially the mud-dauber and 

 the blue mud- wasp and an occasional yellow jacket and white 

 faced hornet. It interests me to see how often insects prefer 

 inconspicuous flowers; indeed in this way they often attract 

 my attention to them. — Nell McMurray. 



Species East and West. — The complete change of 

 botanical horizon which is experienced by the collector from 

 east of the Mississippi when he comes West, is illustrated by 

 a comparison of two local lists of plants which I have just been 

 making. I have before me an enumeration of species collected 

 in Boone County, Kentucky and another from Chelan County, 

 Washington. Both are of about the same length, there being 

 517 species in the Kentucky list, and 510 in that from Wash- 

 ington. Neither list claims to be complete and both doubtless 

 contain numerous errors; but taking them as they stand, only 

 47 of the names, or about nine per cent, appear in both lists. 

 As would be expected, most of these are introduced species, 

 since the weed-flora of most regions in the Temperate Zone is 

 fairly constant. Eliminating the species that are clearly in- 

 troduced in both sections, there are left but 17 native species 

 common to both lists and of these 17, some that are indigenous 

 in the East are probably to be regarded as introduced in the 

 West. The list is as follows: 



Typlia kitifulia, Pulygoniiui azicularc, Anincus sylvcstcr, 

 Fotcntilla monspclieiisis, Rims Toxicodendron, Apocyntim an- 

 drosacmifoliuni, Apocynuui cannabinuiii, Cuscuta arrensis, 

 Verbena bractcosa, Veroinca peregrina, Solanuni niynini, 

 Plantago Purs/iii, Caliuni Aparinc, Ambrosia artcmisifolia 

 Sulidago serotina, Brigeron canadensis, Bidens cernua. While 



