Argemone hispida flowered at Kew in autumn of the present 

 year, from plants raised from seed brought by myself from Colo- 

 rado in 1877. The synonyms for the species are taken from 

 Watson's invaluable Bibliographical Index of North American 

 Botany, where numerous references to American works in 

 which this species is described will be found. The reference 

 "of A. mexicana of Porter's Colorado flora to this species will, 

 however, not be found in that work. 



Descr. A stout, erect, branched biennial, or perhaps 

 perennial-rooted annual, beset with stiff prickly bristles, 

 glabrous or pubescent with short soft curled hairs. Leaves 

 linear-obovate or oblong, two to four inches long, upper 

 sessile and semiamplexicaul, lower narrowed into a petiole, 

 all pinnatifid or deeply sinuate with prickly margins and 

 nerves beneath, not clouded with white (as usual in A. mexi- 

 cana). Flowers three to five inches in diameter, pure white, 

 with golden anthers ; buds one to one and a half inches long. 

 Sepals three, each produced below the tip at the back into an 

 acute horn, sparsely prickly. Petals four to six, very variable 

 in breadth, longitudinally crumpled. Anthers twisted back- 

 wards after discharging the pollen. Stigmas usually four, 

 small, lunate. Capsule narrow-oblong, one and a half to two 

 inches long, very prickly. J. J). //. 



