Sepals 2. Petals 8--12, spatulate-oblong, the inner narrower. Stamens about 24. Style short; stigma 2-grooved. Pod oblong, turgid, 1-celled, 2-valved. Seeds with a large crest.--A low perennial, with thick prostrate premorse rootstocks, surcharged with red-orange acrid juice, sending up in earliest spring a rounded palmate-lobed leaf, and a 1-flowered naked scape. Flower white, handsome, the bud erect, the petals not crumpled. (Name from the color of the juice.) 1. S. Canadénsis, L.--Open rich woods; common. April, May. 2. STYLÓPHORUM, Nutt. CELANDINE POPPY. Sepals 2, hairy. Petals 4. Style distinct, columnar; stigma 2--4-lobed. Pods bristly, 2--4-valved to the base. Seeds conspicuously crested.--Perennial low herbs, with stems naked below and oppositely 2-leaved, or sometimes 1--3-leaved, and umbellately 1--few-flowered at the summit; the flower-buds and the pods nodding. Leaves pinnately parted or divided. Juice yellow. (From στύλος, _style_, and φέρω, _to bear_, one of the distinctive characters.) 1. S. diphýllum, Nutt. Leaves pale or glaucous beneath, smoothish, deeply pinnatifid into 5 or 7 oblong sinuate-lobed divisions, and the root-leaves often with a pair of smaller and distinct leaflets; peduncles equalling the petioles; flower deep yellow (2´ broad); stigmas 3 or 4; pod oval.--Damp woods, W. Penn. to Wisc. and Tenn. May.--Foliage and flower resembling Celandine. 3. CHELIDÒNIUM, L. CELANDINE. Sepals 2. Petals 4. Stamens 16--24. Style nearly none; stigma 2-lobed. Pod linear, slender, smooth, 2-valved, the valves opening from the bottom upward. Seeds crested.--Biennial herb with brittle stems, saffron-colored acrid juice, pinnately divided or 2-pinnatifid and toothed or cut leaves, and small yellow flowers in a pedunculate umbel; buds nodding. (Ancient Greek name from χελιδών, the _swallow_, because its flowers appear with the swallows.) C. MÀJUS, L. (CELANDINE.) Waste grounds near dwellings. May--Aug. (Adv. from Eu.) 4. GLAÙCIUM, Tourn. HORN-POPPY. Sepals 2. Petals 4. Style none; stigma 2-lobed or 2-horned. Pod very long and linear, completely 2-celled by a spongy false partition; seeds crestless.--Annuals or biennials, with saffron-colored juice, clasping leaves, and solitary yellow flowers. (The Greek name, γλαύκιον, from the glaucous foliage.) G. LÙTEUM, Scop. Lower leaves pinnatifid; upper ones sinuate-lobed and toothed, cordate-clasping; pods rough (6--10´ long).--Waste places S. E. New Eng., Md., and Va.; not common. (Adv. from Eu.) 5. PAPÀVER, Tourn. POPPY. Sepals mostly 2. Petals mostly 4. Stigmas united in a flat 4--20-rayed crown, resting on the summit of the ovary and capsule; the latter short and turgid, with 4--20 many-seeded placentæ projecting like imperfect partitions, opening by as many pores or chinks under the edge of the stigma.--Herbs with a white juice; the flower-buds nodding. (Derivation obscure.)--Three annual species of the Old World are sparingly adventive; viz.: