PAP AVER ACE J:. 21 



Sepals 2, hairy. Petals 4. Stamens many. Style 

 short, distinct j stigmas 4 to 6, radiating, convex, free. 

 Capsules obovate, 1-celled, opening by 4 valves at the 

 apex. — Perennial herbs with a yellow juice and pinnatificd or 

 pinnately divided leaves. 



M. DIPHYLLUM, DC. Celendine Poppy. 



I. BMS pinnatcly divided, glaucous beneath; segments 5 to 7, ovate-oblong:, 

 sinuate: item haves 2, opposite, petiolate: pedicels aggregated, terminal ; capsnk 

 4-valved, eehinate. 



Woods. Alleghany mountains. May. Stem a foot hijrh. Leaves large, 8 by 6 

 inches, on petioles about the same length. Peduncles about 3 inches long, 

 1-tiowered. Flowers deep yellow, 2 inches broad. 



3. ARGEMONE. Linn. 



Gr. are/ema, a disease of the eye, -which this plant was supposed to cure. 



Sepals 3, roundish, acuminate. Petals 4 to 6. Stamens 

 many. Style scarcely any : stigmas 3 to 6, radiate; Cap- 

 sule ob-ovoid, opening at the top by valves. — Herhs with 

 prickly bristles anel yellow juice. Animal or biennial. 



A. Mexicaxa, L. Horn Poppy. 



Leaves repand-sinuate or pinnatifid, with spiny teeth : flowers solitary, erect, 

 axillary; calyx prickly : capsules prickly. 6-valved. 



Banks of streams. June, July. Stem 1 to 3 feet high, branching, armed with 

 prickly spines. Leaves sessile, 5 to 8 inches long. Flowers yellow, about 2 inches 

 in diameter. Probably introduced. 



4. OHELIDONIUM. Linn. Celexdixe. 



Gr. chdi'lon a swallow: flowering about the time when swallows appear. 



Sepals 2, glabrous. Petals 4, suborbicular, contracted 

 at the base : stamens numerous 24 to 32, shorter than the 

 petals. Stigma 2-lobed. Capsule silique-form, slender, 

 smooth, 2-valved, the valves opening from the bottom : Seeds 

 several, crested. — Perennial herbs, with brittle stems, and 

 acrid yellow juice. 



C. Majus, L. Common Celendine. 



Leaves pseudo-pinnate, glaucous; segments ovate, crenate lobed ; pedicels some- 

 what umbellate : petals elliptic, entire, flowers in umbels. 



A pale green juicy plant growing in waste places. Introduced from Europe. 

 Naturalized. May — Aug. St>m 1 to 2 feet high, branched. Flowers yellow, v*ry 

 fugacious, borne in thin axillary, pedunculate umbels. 



5. PAPAVER. Linn. Poppy. 



Celtic papa, pap ; being added to the food of children to induce sleep. 



Sepals 2, concave, caducous. Petals 4. Stamens many, 



