230 PAPAVERACEAE 



numerous. Ovary turbinate, glabrous, with 4-11 parietal placentae; style slender, simple; 

 stigma capitate. Capsule turbinate, tipped by the persistent style and dehiscent by 4-11 

 short valves at the summit. Seeds numerous, reniform, reticulate-rugose. [Name Greek, 

 meaning style and poppy.] . . 



A monotypic Californian genus. Resembling Papaver calif ornicum in habit but style 

 and fruit very unlike any member of that genus. 



1. Stylomecon heterophylla (Benth.) G. Taylor. Wind Poppy. Fig. 1899. 



Meconopsis heterophylla Benth. Trans. Hort. Soc. Lond. II. 1:408. 1835. 



Meconopsis crassifolia Benth. loc. cit. 



Papaver heterophyllum Greene, Man. Bay Beg. 9. 1894. 



Papaver heterophyllum var. crassifolium Jepson, Fl. W. Mid. Calif. 209. 1901. 



Stylomecon heterophylla G. Taylor, Journ. Bot. 68: 140. 1930. 



Annual the stems simple or branching, 3-6 cm. high, glabrous or sparsely pilose-pubescent 

 below Leaves pinnately parted or divided, usually petioled and somewhat succulent ; peduncles 

 slender; petals 1-2 cm. long, brick red, with a purple spot above the green claw; capsule tur- 

 binate to obovate, dehiscent by 8 operculate lips. 



Shaded slopes Upper Sonoran Zone; Lake and Fresno counties, California, south to northern Lower 

 California. Type locality: California Coast Ranges, collected by Douglas. April-May. 



8. PAPAVER [Tourn.] L. Sp. PI. 506. 1753. 



Annual or perennial herbs with the sap narcotic, and milky or rarely turning yellow. 

 Leaves pinnately lobed or dissected. Flowers showy, solitary on long peduncles, with 2 

 sepals, 4 petals, and numerous stamens. Ovary capped by the closely sessile, circular, flat 

 or somewhat conical disk or combined radiate stigmas. Capsule dehiscent under the edge 

 of the stigmas by as many dentiform short lids; placentae 4-20, mostly projecting far 

 into the cell. [Classical name of the poppy.] 



A genus of about 45 species, all natives of the Old World except the following. Type species, Papaver 

 somnijerum L. 



1. Papaver californicum A. Gray. Western Poppy. Fig. 1900. 



Papaver californicum A. Gray, Proc. Amer. Acad. 22: 313. 1887. 

 Papaver Lemmonii Greene, Pittonia 1 : 168. 1888. 



Erect glabrous or sparsely pilose annual with milky sap, the stems simple or branching, 3-6 

 dm high' leafy below. Leaves pinnately divided, the segments toothed or lobed; petals brick 

 red with 'a greenish spot at base, 2 cm. long or less ; capsule 10-15 mm. long, clavate-turbinate, 

 6-11 -nerved. 



Open woods, especially after fires, Upper Sonoran Zone; California Coast Ranges from Marin County to 

 San Diego; rare and local north of Santa Barbara. Type locality: Santa \nez Mountains, Santa Barbara 

 County. April-May. 



Papaver somniferum L. (Garden Poppy), Papaver Rhoeas L. (Red or Corn Poppy), and P. Argemone L. 

 (Pale Rough-fruited Poppy) are occasionally found growing spontaneously in the Pacific States. Ihey are all na- 

 tives of the Old World. 



9. ARGEMONE L. Sp. PL 508. 1753. 



Annual or biennial herbs or one Mexican species shrubby, with yellow or white acrid 

 sap. Leaves alternate, pinnatifid or sinuate, the divisions spinose-tipped. Flowers erect in 

 bud. Sepals 2 or 3 with a cornute tip or appendage below the apex. Petals 4 or 6, showy. 

 Stamens numerous. Stigmas sessile, somewhat radiate; ovary with 4-6 nerviform pla- 

 centae. Capsule oblong, opening at the apex by 4-6 valves. Seeds numerous, globose, can- 

 cellate; endosperm oily. [Name Greek, meaning an eye disease, for which the juice of a 

 plant so called was a supposed remedy.] 



An American genus of about 10 species. Type species, Argemone mexicana L. 



Leaves sinuate, rarely shallowly pinnatifid, sparsely spiny on the margins and beneath; seeds 1-1 . 5 mm. in 

 diameter. lm A - corymbosa 



Leaves irregularly pinnatifid, often nearly to the midrib, the divisions in turn often divided or toothed, sparsely 

 to densely spiny and hispid on both surfaces; seeds 2-2.5 mm. in diameter. 2. A. platyceras. 



1. Argemone corymbosa Greene. Leafy Prickly Poppy. Fig. 



1901. 



Argemone corymbosa Greene, Bull. Calif. Acad. 2: 59. 1886. 

 Argemone intermedia var. corymbosa Eastw. Erythea 4: 96. 1896. 



Stems stout, erect, corymbosely branching, 4-10 dm. high, armed with stout yellow spines, 

 otherwise glabrous. Leaves oblong to obovate or the upper ovate, 8-15 cm. long, repand-toothed 

 or pinnatifid, rather sparingly prickly on both surfaces, especially on the veins, otherwise gla- 

 brous; sepals sparingly prickly, their horns unarmed on the outer surface; petals 20-35 mm. 

 long ; capsule about 2 cm. long, beset with spreading spines ; deeply 8-12-grooved longitudinally. 



Mojave Desert, Sonoran Zones; Inyo and San Bernardino Counties, California. Type locality: Mohave 

 Desert. April-July. 



