560 



PAPAVERACEAE 



4. ARGEMONE L. 



Annual herbs with acrid orange juice, prickly sinuate or pinnatifid leaves and 

 flowers erect in the bud. Sepals 2 (often 3), with a horn-like appendage below 

 the apex. Petals white, twice as many as the sepals. Ovary 1-celled; stigmas 

 radiate. Capsule 4 to 6-valved at summit. Species 6, North and South America, 

 in the tropics and warm temperate regions. (Greek name of some herb, trans- 

 ferred here.) 

 Calyx rather densely spiny; horn-like appendage of sepals large or conspicuous, spine-tipped 



and with many spines over its surface; flowers not corymbose 1. A. plati/ceras. 



Calyx with scattered spines; horn-like appendage of sepals small or inconspicuous, spine-tipped, 



its surface otherwise unarmed; flowers corymbose 2. A. intermedia. 



1. A. platyceras Link & Otto. CHICALOTE. Stems stout, branched, more or 

 less prickly with long yellow spines, l 1 /^ to 2% feet high ; herbage glaucescent ; 

 leaves oblong, sinuate-pinnatifid into spinose-toothed lobes, tapering to a winged 

 petiole, spinose chiefly along the margin and along the main veins, 2 to 9 inches 

 long; flowers in leafy-bracteate panicles; sepals 3, spiny, each with a horn at 

 apex, the horns lanceolate, spiny on the sides and strongly spine-tipped ; petals 6, 

 obovate, truncate, 1 to 2 inches long ; capsule narrowly cylindrical, l 1 /^ to 2 inches 

 long, the valves firm, becoming somewhat indurated, densely spiny. 



Southern California. East to Texas. Apr.- July. 



Locs.- Tehachapi Valley, Jepson 7431; Sisquoc River Valley, Santa Barbara Co., M. S. 

 Baker; Mt. Pinos, Ventura Co., Hall 6504; San Jacinto Valley, Eeinliardt ; Laguna Mts., San 

 Diego Co., T. Brandegee; Split Mt., T. Brandegee; Chuckawalla Mts., Hall 5970. 



Passing by intergrades into the var. hispida Prain, the whole plant densely setose-hispid 

 as well as armed with stouter yellow spines. Coast Ranges; e. side of the Sierra Nevada; 

 mountains of Southern California ; 2000 to 8000 feet, June-Sept. : Gravelly Valley, n. Lake 

 Co., Jepson; New Idria, San Benito Co., Brewer 768; San Antonio Canon, San Antonio Mts., 

 Peirson 55; Burnt Corral Mdw., Little Kern River, Jepson 1039; foot of Bloody Canon, Mono 

 Co., Chesnut $ Drew; Milford, Lassen Co., M. S. Baker. Reno, Nev., Jepson. 



Refs. ARGEMONE PLATYCERAS Link & Otto, Ic. PI. Rar. 1:85, t. 43 (1828), type loc. 

 Hacienda de la Laguna, Conf're de Perote, Mexico. Var. HISPIDA Prain, Jour. Bot. 33:367 

 (1895). A. hispida Gray, Mem. Am. Aead. ser. 2, 4:5 (1849), type loc, Santa Fe, N. Mex., 

 Fendler 16 (in part). A. munita Dur. & Hilg. Jour. Aead. Phila. ser. 2, 3:37 (1855), type 

 loc. Williamson Pass, Heermann; Pac. R. Rep. 5:5, t. 1 (1855). 



2. A. intermedia Sweet var. corymbosa Eastw. PRICKLY POPPY. (Fig. 

 116.) Plants 1 to 3 feet high, prickly with stout yellow spines; leaves oblong to 

 obovate or the upper ovate, repand-toothed to sinuate-pinnatifid; flowers frag- 

 rant, somewhat regularly corymbose; petals 10 to 14 lines (sometimes to 1^ 

 inches) long ; capsule % inch long. 



Mohave Desert. May-June. 



Locs. Nipton, e. Mohave Desert, K. Brandegee; Kelso, K. Brandegee; Ludlow, Jepson 

 5499; Blacks Ranch, se. of Fremont's Peak, Hall $ Chandler 6848; Rabbit Sprs., Jepson 5945. 



Refs. ARGEMONE INTERMEDIA Sweet, Hort. Brit. ed. 2, 585 (1830), type from Mexico. 

 Var. CORYMBOSA Eastw., Erythea 4:96 (1896). A. oorymbosa Greene, Bull Gal. Aead. 2:59 

 (1886), type loc. Mohave Desert, Curran in 1884; Parish, Bot. Gaz. 65:337 (1918). 



5. PAPAVER L. POPPY 



Erect herbs (ours annual) with narcotic juice. Leaves pinnately cleft, lobed 

 or divided. Flowers showy, solitary on long peduncles, nodding in bud. Sepals 

 2. Petals 4, in ours red. Stamens very many. Ovary and capsule obovoid to 

 subglobose, with 4 to many intruded placentae. Capsule Opening by holes just 

 below the summit. Species about 50, mostly in Europe, Asia, and Africa, one 

 in Australia, one (P. nudicaule L.) in boreal North America and south in the 

 Rocky Mts. to New Mexico, and two in the Calif ornias. (Latin name of the 

 poppy.) 



Juice milky; stigmas sessile and radiate upon the summit of the ovary. Subgenus EUPAPAVER. 



1. P. calif 'ornicum. 

 Juice yellow; stigmas capitate upon the short slender styla Subgenus MECONOPSIS. 



2. P. heterophyllum. 



