Meconopsis. PAPAVERACEiE. 611 



Growing; wild occasionally in waste grounds, but scarcely naturalized. — 

 (X) Common Poppy. 



2. ARGEMONE. Linn.; Gcertn.fr. t. 60; Lam. ill. t. 452. 



Sepals 2. Petals 4-8. Stamens numerous. Stigmas 4-7, almost sessile, 

 radiating, concave, free, alternate with the placentae. Capsule obovate, 

 opening at the apex by valves, which separate from the persistent filiform 

 placentae. Seeds globose, pitted and reticulated. — Annual glaucous herbs, 

 with a yellow juice. Leaves sessile, repand-sinuate or jjinnatifid, with 

 prickly teeth. Peduncles erect before and after flowering. 



1. A. Me.vicana (Linn.) : loaves usually blotched with white ; flowers 

 solitary; calyx glabrous, prickly; petals yellow ; capsules prickly. — Bot. 

 mag. t. 243 ; Pursh.Ji. 2. p. 366'; Ell. sk. 2. p. 13; DC.prodr. 1. p. 120. 



/?. flowers ochroleucous. 



y. flowers larger, white. — A. Mexicana /?. albiflora, DC. I. c ; Bot. mag. t. 

 2342. A. alba, /?«/. _^. Ludov. A. Georgiana, Croom .' in Sill. jour. 25. 

 p. 75. 



<5. capsules not prickly. 



In waste and cultivated places throughout the Southern and Western 

 States. West to the Platte and Canadian Rivers ! Native ? ^. Key West ! 

 Sparingly naturalized in the Northern States. June-Oct. — Prickly Poppy. 



3. MECONOPSIS. Viguier, diss. p. 20; DC. syst. 2. p. 86. 



Sepals 2. Petals 4. Stamens numerous. Style short but distmct: stig- 

 mas 4-6, radiating, convex, free. Capsule obovate, opening by valves at 

 the apex : placental (opposite to the stigmas ?) slender, scarcely extending 

 into the cell. — Perennial herbs with a yellow juice. The first section is 

 very near Papaver; the second is somewhat allied to Argemone. 



§ 1. Capsides o-6-[^sometimes 4-] talced, smooth. — Meconopsis, DC. 



1. M. hetcr'ophylla (Benih.): leaves few and remote, pinnatcly divided; 

 segments of the lower ones ovate, incised and petioluled ; of the upper li- 

 near, entire, someAvhat confluent. Benth. in hart, trans, (ser. 2.) ].p. 40. 



California, Douelas, Nuttall ! — A foot high. Flowers smaJl, scarlet. 

 Petals unequal. Nutt. 



2. M. crassifoUa (Benth.) : stem leafy at the base ; leaves rather thick, 

 glaucous, pinnately divided ; the segments incisely lobed, with revolute mar- 

 gins ; those of the lower leaves ovate-cuneifonu, of the upper linear-cunei- 

 form. Benth. '. I. c. 



California, Douglas ! — Flowers orange-red. 



§ 2. Capsides A-valved, echinate-setose. — Stylophorum, Nutt. 



3. M. diphylla (DC.) : leaves pinnately divided or parted ; segments 5-7, 

 obovate-oblong, sinuate, glaucous beneath ; cauline leaves mostly 2, opposite ; 

 peduncles aggregated, terminal. — DC. syst. 2. p. 88, ^ prodr. 1. p. 121. 

 M. petiolata, DC. I. c. Chelidonium diphyllum, Michx. ! Jl. 1. p. 309. 

 St)^lophorum diphyllum, Nutt. ! gen. 2. p. 7. S. petiolatum, Nutt. ! I. c. 

 S. Ohioense, Sprcng. syst. 2. p. 570. 



