TWENTY-FOUBTH ANNUAL MEETING. 27 



' Rudbeckia hirta L. — Plant more hispid in some localities than in others. 



CEnothera sinuata L. — Varies in the amount of pubescence. 



Chrindelia squarrosa Dun. — Considerable variation in the degree of viscosity. 



Senecio douglasii DC. — Varies extremely, from glabrate green to white tomen- 

 tose. Very common all over the southwestern great plains. 



Riddellia tagetina Nutt. — Varies in amount of pubescence, and is quite common. 



Several species of Astragalus vary extremely in the amount of pubescence, es- 

 pecially Astragalus lotiflorus Hook. 



IV. — Vakiations in Colob. 



Viola tricolor L. — With its various forms, is perhaps the most variable in color 

 of all our common species. . The color of the flower is of all shades from " purple 

 through white to yellow," and it is well known that from it have sprung all our cul- 

 tivated pansies, with their many and variegated colors. 



Oxalis violacea L. — Often presents pure white flowers, in certain isolated spots. 



Viola palmata L.; var. cucullata Gray — Often shows white flowers, especially in 

 woods. 



Lejiachys columnaris T. & G., with its var. pidcherrima T. & G., and intermediate 

 forms, are striking examples of variation in color. Illustrations of all the various 

 shades, graduating from the one extreme to the other, can easily be found in south- 

 west Kansas. 



Lepachys tagetes Gray — Presents various shades of color in flowering, exactly cor- 

 responding to those of the last. Have collected the various forms in southwest 

 Kansas. This species, however, does not seem to be very widely diffused. 



Others may be added, as follows: 



Tradescantia virginica L. — Various shades of purple, blue, and red. 



Sisyrinchium mucronatum Mx. and 



S. anceps L. — various shades of blue. 



Callirrhoe involucrata Gray — Various shades of purple and red, and sometimes 

 nearly white.* 



Aster multiflorus Ait. — White and intermediate shades to blue. 



Phlox divaricata L. — All shades, from violet to white and red. 



Schrankia uncinata Vfilld. — Deep red to nearly white (rarely pure white, as noted 

 in western Indian Territory).! 



Andropogon i^rovincialis Lam., and Panicum crus-galli L. — Vary greatly in color 

 of all parts of the plant. 



I shall now mention, on the other hand, a number of the most striking illustra- 

 tions, among hundreds of others, of constancy in species. Nearly all are quite un- 

 common, but usually wide ranging: 



Peucedanum nudicaide Nutt. — Quite rare, in my experience. 



Lithospermum liirtum Lehm. — (Slightly variable in color of flower.) 



Redfieldia flexuosa Vasey — In sand hills of the Southwest. 



Castilleia sessiliflora Ph. 



Nasturtium sessiliflorum Nutt. — (Slight variableness.) 



Atriplex expansa Wats. — ^Southwestern great plains. 



Cleomella angustifolia Torr. 



* As observed by the writer on North Canadian river, in neutral strip, Indian Territory, August, 

 1891. 



fin Cheyenne and Arapahoe country, near a "blackjack" grove, in the vicinity of Kingfisher. 

 There the writer saw the most beautiful wild garden of these "sensitive roses" that he ever observed. 

 It was a brilliant sight; and among the innumerable large specimens that fairly matted the ground 

 were a few with pure white flowers. 



