52 PAPAVERACEAE. 



united carpels. Ovaiy superior, sessile or stipitate. Fruit capsular or 

 baccate. 



Sepals 2, or very rarely 3 or 4 : endosperm present. Fam. 1. Papaveraceae. 

 Sepals 4-8 : endosperm wanting. 



Capsules 2-celled : stamens 6, tetradynamous. Fam. 2. Brassicaceae. 



Capsules 1-celled : stamens when 6 not tetradynamous. Fam. 3. Cappahidaceae. 



Family 1. PAPAVERACEAE. Poppy Family. 



Herbs or rarely woody plants, tbe sap colored. Leaves alternate or 

 opposite: blades entire, toothed, or divided. Flowers perfect, regular. 

 Calj'x of 2, or rarely 3, caducous sepals. Corolla of 4, 8 or 12, or rai'ely 

 more, deciduous petals. Androecium usually of many distinct stamens. 

 Gynoecium 2-several-carpellary. Fruit a capsule. 



1. ARGEMONE L. Herbs. Leaf-blades incised-pinnatifid. Flower-buds 

 erect. Sepals 2 or 3, hooded or horned. Petals 4 or 6, broad. Gynoecium 

 4-6-carpellary, the ovary with 4-6 nerviform placentae. Stigma 4-lobed. 

 Capsule elongate. — Prickly-poppy. 



Inflorescence, and capsules, spine-awned : petals yellow or white. 



Corolla yellow: leaf-blades blotched. 1. A. mcxicana. 



Corolla white : leaf-blades not blotched. 2. A. alha. 



Inflorescence, and capsules, spineless : petals yellow. 3. A. Iciocarpa. 



1. A. mexicana L. Plants glaucous, 3-9 dm. tall: leaves 10-25 cm. long; 

 blades runcinate-pinnatifid, blotched, spiny-toothed and commonly spiny along 

 the midrib, sessile and clasping: sepals acuminate and bristle-tipped: corolla 

 yellow, 2.5-7 cm. broad: capsules oblong, 2.5-3 cm. long, spine-armed. — 

 Cultivated grounds and waste places, Key West. Nat. of Mex. — [E. K.] — 

 {Ber., Bah., Cuia, Ant.) 



2. A. alba Lestib. Plants pale or somewhat glaucous, spine-armed: stems 

 stout, 3-5 dm. tall, often diffuse: leaves 3-15 cm. long; blades piunately 

 lobed or pinnatifid, sometimes whitish along the veins, the midrib slightly 

 prickly: flowers pedieelled: sepals 1.5-2 cm. long, the terminal spine 1-1.5 

 mm. long, distinctly flattened: corolla white, 7-10 cm. broad: capsules oval or 

 oblong, 2.5—4 cm. long. — Roadsides, sandy waste places and cultivated grounds, 

 Key West. 



3. A. leiocarpa Greene. Plants resembling those of A. mexicana but more 

 glaucous, devoid of spines, except on the margins of the leaf-blades, which are 

 rather more copiously spineseent: calyx unarmed: petals yellow, 3-4 em. long: 

 capsules smooth and glabrous, 3-4 cm. long. — Hammocks and cultivated 

 grounds, L. keys, L. S. keys. 



Family 2. BRASSICACEAE. Mustard Family. 



Herbs or partially woody plants, the sap watery. Leaves alternate: 

 blades entire, toothed, or dissected. Flowers perfect, in spikes or racemes. 

 Calyx of 4 mostly erect or appressed sepals. Corolla of 4, usually clawed, 

 petals, or wanting. Androecium of 6, or rarely 2 or 4, didynamous 

 stamens. Gynoecium of 2 united carpels. Stigma depressed or 2-lobed. 

 Fruit capsular, elongate (silique) or short (silicle), flat, terete or angled. 



Pods flattened contrary to the narrow partition, winged or margined. 1. LepidiuM. 

 Pods not flattened contrary to the partition; neither winged nor 

 niargincd. 



IN)ds dehiscent lengthwise. 2. Sophia. 



I'ods separating into joints, with transverse partitions. 3. Cakile. 



