PA PA VERA CEA E. 439 



5. Papaver radicatum Rottb. Arctic Poppy. (I. F. f. 1662.) More ox 

 less hirsute. Leaves all basal, pinnately lobed or cleft, the lobes linear-oblong; 

 scape erect, slender. 0.5-3 ^ in - ta ^* mucn exceeding the leaves; flower solitary, 

 2-8 cm. broad, yellow or red; filaments filiform; capsule narrowly obovoid, I-I.6 

 cm. high, about 8 mm. in greatest diameter, densely beset with erect bristly hairs. 

 Greenland and Lab. to Alaska and Br. Col. Also in Europe and Asia. Summer. 



2. ARGEMONE L. 



Glaucous herbs, with yellow sap, spiny-toothed leaves and large flowers. Sep- 

 als 2 or 3. Petals 4-6. Stamens 00 . Placentae 4-6, many-ovuled. Style very 

 short. Stigma dilated, 3-6-radiate. Capsule prickly, oblong, dehiscent at the 

 apex by valves. Seeds numerous, cancellate. [Greek, an eye disease, supposed 

 to be relieved by the plant so called.] A genus of about 10 species, natives of the 

 warmer parts of America. 



Petals yellow or ochroleucous. 1. A. Mexicana. 

 Petals white or pinkish. 



Stem spiny or unarmed, not hispid-pubescent. 



Horns of the sepals nearly erect, the terminal spine 1-1.5 mm. l° n g 5 flowers 



peduncled. 2. A. alba. 

 Horns of the sepals diverging, the terminal spine 2-4 mm. long ; flowers usually 



sessile. 3. A. intermedia. 



Stem spiny and also hispid-pubescent. 4. A. hispida. 



1. Argemone Mexicana L. Mexican or Prickly Poppy. (I. F. f. 1663.) 

 Stem 3-6 dm. high, spiny or sometimes nearly unarmed. Leaves sessile, clasping 

 by a narrowed base, I-2.5 dm. long, glaucous, runcinate-pinnatifid, spiny-toothed 

 and more or less spiny on the veins; flowers orange or yellow, sessile or subsessile, 

 2-8 cm. broad ; sepals acuminate, bristly-pointed ; capsule 2.5 cm. long or more; 

 stigma sessile. In waste places, N. J. and Penn. to Fla. and Tex. Also in ballast 

 about the northern seaports. Adventive from tropical America. June-Sept. 



Argemone Mexicana ochroleuca Lindl. Flowers ochroleucous ; style distinct. Oc- 

 casional with the type. 



2. Argemone alba Lestib. White Prickly Poppy. (I. F. f. 1664.) Similar 

 to the preceding species, but commonly stouter and taller. Leaves pinnatifid or 

 pinnately lobed. sometimes whitish along the veins; flowers white, usually larger, 

 7-10 cm. broad, distinctly peduncled; petals generally cuneate-obovate; terminal 

 spine of the nearly erect, flattened sepal-tips, 1-1.5 mm. long ; capsules oval-ellip- 

 soid. 2.5-4 cm. long. Fla. to Mo. and Tex. May-Aug. 



3. Argemone intermedia Sweet. Leafy, the flowers usually sessile or nearly 

 so. Petals broadly obovate. often as wide as long; horns of the sepals pyramidal, 

 not much flattened, diverging, the terminal spine 2-4 mm. long; capsule cylindric- 

 ellipsoid. Plains. S. Dak. to Idaho, Tex. and Mex. May-Aug. 



4. Argemone hispida A. Gray. Plant spiny, and also densely hispid-pubes- 

 cent. Petals obovate; horns of the sepals triangular-lanceolate, more or less spiny 

 and hispid. Kans. to N. Mex. and Cal. 



3. SANGUINARIA L. 



Rootstock horizontal, thick ; juice red. Leaves basal, palmately veined and 

 lobed, cordate or renilorm. Scape I -flowered (rarely 2). Flower white. Sepals 

 2, fugacious. Petals 8-12, arranged in 2 or 3 rows. Stamens cc . Stigmas 

 grooved. Placentae 2. Capsule oblong, dehiscent to the base, the valves persist- 

 ent Seeds smooth, crested. [Name from the red juice.] A monotypic genus of 

 eastern N. Am. 



1. San uinaria Canadensis L. Bloodroot. (I. F. f. 1665.) Glabrous, 

 glaucous, especially when young. Rootstock several inches long, clothed with 

 thick fibrous roots; petioles 1. 5-3. 5 dm. long; leaves 1.5-3 dm. broad. 1-2 dm. 

 long, palmately 5-9-lobed. the lobes repand, or cleft at the apex; flower 2.5-4 cm. 

 broad; petals oblong or obovate, early deciduous; capsule oblong, narrow, i-celled, 

 2-valved. 2-3 cm. long. In rich woods, N. S. to Manitoba, Neb., Fla. and 

 Ark. April-May. 



