BRASSICACEAE. 77 



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

 Sepals 4-8 : endosperm wanting. 



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



Capsules l-celled : stamens when 6 not tetradynamous. Fam. 3. CAPPAEIDACEAE. 



FAMILY 1. PAPAVERACEAE. POPPY FAMILY. 



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

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

 Calyx of 2, or rarely 3, caducous sepals. Corolla of 4, 8 or 12, or rarely 

 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. 



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. 

 Waste and cultivated grounds. Nat. of Mex. F. K. (Ber., Bah., Cuba, 

 Ant.) PKICKLY-POPPY. 



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 not stlpitate. 



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



1. LEPIDIUM. 

 Pods not flattened contrary to the partition : neither winged or 



margined. 



Pods dehiscent lengthwise. 2. SINAPIS. 



Pods separating into joints, with transverse partitions. 3. CAKILE. 



Pods stipitate. 4. WAKEA. 



1. LEPIDIUM [Tourn.] L. Herbs. Leaf-blades entire to pinnatifid. 

 Eacemes terminal. Sepals 4, spreading. Petals 4, longer than the sepals, or 

 wanting. Stamens usually fewer than 6. Ovule, and seed, 1 in each carpel. 

 Pods suborbicular to oblong. 



1. L. virginicum L. Stems 2-9 dm. tall: blades of the cauline leaves narrow, 

 sharply toothed or incised: pedicels spreading, 3-4 mm. long at maturity: 

 sepals oblong, about 1 mm. long: petals slightly longer than the sepals: pods 

 3-4 mm. wide. Pinelands and cultivated grounds. F. K. (Ber., Bah., Cuba, 

 Ant.) PEPPERGRASS. 



2. SINAPIS [Tourn.] L. Herbs. Leaf -blades lobed or pinnatifid. 

 Sepals 4, herbaceous. Petals 4, mostly yellow, the blades broad. Stamens 6: 

 anthers narrowly oblong. Style columnar: stigma depressed. Pod elongate, 

 the beak sword-like. Seeds thick, marginless. 



