26 KANSAS ACADEMY OF SCIENCE. 



II. — Variations in Mobphology. 



Variations in the form of the leaf seexa. to be the most common under this head. 



Callirrhoe involucrata Gray — Is one of the most variable, in this respect, of our 

 common species. The form of the leaf ranges from entire to many cleft, while even 

 "the segments themselves may be lobed." 



Vitis riparia Mx. — Also presents great variations in form of the leaf, ranging 

 from entire to deeply 3-lobed. 



Several species of Phaseolus, quite common, show great variations in leaf mor- 

 phology, especially in Phaseolus diversifoUus Pers. * 



Grindelia squarrosa Dun. and forms — Show great variations in the form of the 

 leaf, and involucral bracts especially. 



Variations in the forms of compound leaves are very diverse, and were fully and 

 ably discussed in a paper at the preceding meeting of this Academy of Science.^ 



Carex straminea Schk. — Is well known to be extremely variable, and also com- 

 mon. It varies principally in the form and arrangement of the spike and spikelets. 

 It has a number of published varieties, and numberless intermediate forms. 



Carex laxiflora Lam. — Varies also as the last, and in the form of the leaf. Very 

 common. 



There are many instances known of the doubling of flowers among common 

 species, but these seem to be monstrosities, appearing only for a time, as there is 

 apparently no case on record, so far as I know, where such variations became con- 

 stant among wild plants. 



Other species that may be added are: 



CEnothera sinuata L. — Varies in form of leaf. 



Gaillardia lyulchella Foug. — Varies in form of leaf. 



Verbena bipinnatifida Nutt. — Varies in form of leaf. 



Anemone decapetala L. — Varies in form of leaf. 



Aplopappus spinulosus DC. — Varies in leaf morphology. 



Panicum crus-galli L. — Varies in all parts. 



Senecio douglasii DC. — Varies greatly in form of leaf. 



III. — Vabiations in Tbichomes. 



Aplopappus spiiiulosus DC. — Is one of- the most variable species in the develop- 

 of trichomes, and, at the same time, a very common species, and widely diffused. 

 It varies from smooth to whitish woolly, with all intermediate forms. Have col- 

 lected three different forms at Tascosa and Canadian City, Tex. — one of them entirely 

 smooth. Reported from Colorado with "soft, minute woolly pubescence.;]! 



Chrysopis villosa Nutt. — "Extremely variable in the size and shape of the leaves, 

 in the number of the flo'wer heads, and in the kind and amount of pubescence. It in- 

 cludes several nominal species. Common everywhere, at all elevations." § 



The above description of this species is so completely confirmed by my own ob- 

 servations, that I copy it entire. Have collected specimens, showing several stages 

 in the development of trichomes, at different places in southwest Kansas, western 

 Indian Territory, and Texas panhandle. 



Others may be added, as follows: 



Enyelmannia pinnatifida T. & G. — Flower heads more hairy, seemingly, farther 

 westward. 



* A recent revision makes this species Strophostyles angulosa Ell. (Watson In Gray's Manual, 6th ed., 

 p. 145 ). 



fMrs. W. A. Kellerman — "Evolution in Leaves," Trans. Ku.s. Acad. Scl., vol. XII, part 'i, p. I(i8-17:!. 

 J Porter & Coulter — "Flora of Colorado," p. (J5. 

 SL. c.,p. 67. 



