OP AETS AND SCIENCES. 293 



SIDA, L. Bentham has well indicated the conniving or erect tips 

 or i^oints (when there are any) of the carpels for a good character of 



Mexican. The corolla is said by Cavanilles to be violaceous, and the colored 

 figures approach to that liue. On tickets the record is commonly "rose-color." 

 As Watson states, in Proc. Am. Acad. xvii. 331, striking as the difference is, one 

 cannot specifically separate the following. 



Var. cuspiDATA. Mostly smaller-leaved and smaller-flowered; petals "red"; 

 carpels narrower, tipped with an erect cusp, which sometimes persists and be- 

 comes even a line long, sometimes is reduced to a mucronate point, the short 

 basal portion either slightly or strongly rugose-reticulated on the sides. — S. stel- 

 lata, Torr. & Gray, Fl. i. 228. Sida stellata, Torr. Ann. Lye. N. Y. ii. 171. Texas 

 to Arizona and S. Colorado ; also Mexico. 



•^ ++ Leaves of oblong or roundish outline and often cordate, mostly 3-5-lobed, 

 sometimes dissected : cusps of the carpels more or less extrorse. 



= Leaves thickish, rugose and undulate : fruit depressed : carpels not at all 

 rugose-reticulated : calyx mostly half an inch long, and brick-red petals 

 longer. 



S. Emoryi, Torr. in Gray, PI. Fendl. 23, & PI. Wright, i. 21, only partly of 

 later authorities. Tlius far known only from Arizona, on the Gila, coll. by 

 Emory and by Parry, and from Chihuahua, Mexico, by Gregg and Thurber. 



= = Leaves thinner, not rugose : fruit higher than wide, the carpels more or 



less reticulated on the sides. 



a. More or less canescent, or stellular-pubescent : species perhaps confluent, 



certainly variable. 



S. Fendleri, Gray, PI. Wright, i. 21, ii. 21. S. miniata, Gray, PI. Fendl. 19, 

 & Gen. III. ii. 70, t. 127, not Spach. Mountains of W. Texas to Arizona and 

 northern part of New Mexico. Here also seem to belong some forms which 

 have been variously referred to S. incana. The leaves are generally green or 

 greenish, or only lower face canescent, and their outline ovate-oblong or sub- 

 hastate, incised or lobed but not dissected ; carpels prominently cuspidate. 



S. INCANA, Torr. in Gray, PI. Fendl. 23, & PI. Wright, i. 21. Common in 

 New Mexico, Arizona, and adjacent Mexico. Passes into var. dissecta, Gray, 

 PL Wright. 1. c, a form with small deeply 3-5-cleft or parted leaves, the di- 

 visions and lobes commonly narrow. 



S. Wrightii, Gray, PI. Wright, ii. 21, from N. E. Chihuahua not far below 

 the U. S. boundary, has not since been collected ; it is probably a good species. 



h. Leaves wholly green, small, rather finely dissected, obscurely pubescent, or 



with the slender stems glabrous. 



S. KosBYi. This I know only from a specimen (no. 537) collected by Dr. 

 Rusby near Prescott, Arizona, and belonging to the Torrey herbarium. The 

 stems are spicately or racemosely few-several-flowered ; lobes of the leaves 

 linear or nearly so; petals red, not over a third of an inch long; calyx loosely 

 and subcanescently pubescent, the ovate lobes barely equalling the hemispheri- 

 cal fruit; oblong carpels barely mucronulate, and sides at base obsoletely 

 rugulose. 



