

PAPAVERACE^E. 21 



Herbs or shrubs, with a milky juice. Leaves alternate, 

 more or less divided. Peduncles long, 1-flowered. 



1. ARGEMONE. Linn. 



Petals 4 6. Stamens many. Style scarcely any. Stig- 

 mas 4 7, radiating, concave, free. Capsule obovate, 1-cell- 

 ed ; valves dehiscent at the apex. Seeds spherical. 



Polyandria. Monogynia, 



A. tnexicana Linn. 



HAB. Banks of streams. Penn. to Flor. .W. to Miss. July. 0. 

 Stem 2 3 feet high, branching, armed with prickles. Leaves 

 sessile, pinnatifid, repand-sinuate, margins and veins beneath 

 armed with spines. Flowers axillary and terminal, large, yel- 

 low or white. Prickly Poppy. 



2. SANGUINARIA. Linn. 



Sepals 2, deciduous. Petals 8 12. Stamens 24. Stig- 

 mas 2. Capsule oblong, 2-valved, ventricose ; valves deci- 

 duous. Polyandria. Monogynia. 



S. canadensis ^ 



HAB. Woods. 'Throughout the U. S. and Can. April, May. 

 11. Root tuberous, affording a bitter orange coloured juice. 

 which contains a vegeto-alkaline principle. Leaves radical, re- 

 niform or cordate. Flowers large, white, solitary. Medicinal. 

 Emetic, &c. Big. Med. Eot. i. 75. TuLly on Sanguinaria. Am. 

 Med. Recorder } vol. xiii. Blood Root* 



3. MECONOPSIS. De Cand. 



Petals 4. Stamens many. Style short. Stigmas 4 6, 

 radiating, convex, free. Capsule obovate, 1-celled ; valves 

 4 6, dehiscent at the apex. Polyandria. Monogynia. 



M. diphylla De Cand. : leaves 2, sessile, hairy ; lobes rounded and 

 obtuse ; capsules 4-valved y echinate. Chelidonium diphyttum Mich. 

 Pursh. Stylophorum diphyttum Nuit. 



HAB. Woods. Penn. to 111. May. If. Stem a foot high. 

 Leaves glaucous. Flowers yellow. Abundant in Indiana. 



4. CHELIDONIUM. Linn. 



Sepals 2, glabrous. Petals 4. Stamens many. Capsule 

 elongated, 2-valved, 1-celled ; valves dehiscent from the base 

 to the apex. Seeds several, furnished with a glandular crest. 



Polyandria. Monogynia. 



C. tnajus Linn. : leaves pinnate, glaucous ; leafets roundish, den- 

 tate-lobed ; umbels axillary, pedunculate ; petals elliptic, entire* 



