POLYPETALOUS EXOGENOUS PLANTS. 157 



Stavietis 6, diadelphous, each bundle opposite the larger 

 petals; sometimes all joined, in one tube below; the two 

 outer anthers are 1-celled, the two inner 2-celled, of each 

 bundle. Pislil 1, like the Poppy family. Fruit either 

 an indehiscent nut 1-2-seeded, or a pod-shaped capsule 

 many-seeded ; seeds ariled and glossy. 



CORYDALIS. 



Sepals minute. Petals separate, deciduous ; one of the 

 outer ones saclike at the base. Filaments united nearly 

 to the summit, with gland at the base. Stigma 2-lobed. 

 Capsule many-seeded. Seed crested. Caulescent, annual 

 or biennial herbs, with bipinnate dissected leaves, and 

 flowers in lateral and terminal racemes. 



C. AUREA, Willd. Stems diffuse ; racemes simple ; cap- 

 sule knotted, drooping ; crest of the seeds scalloped ; flow- 

 ers yellow. March. Hueco Mountains. — Thurher. 



C. GLAUCA, Pursh. Stems erect; racemes compound; 

 capsule even, erect; crest of the seeds entire; floivers 

 whitish, tinged with yellow, and reddish. Plant glaucous, 

 l°-2° high, leaves finely dissected as in C. aurea, but 

 coarser. 



13. CRUCIFEROUS or CRESS FAMILY. Order, 

 Crucifer^. 



Herbs with watery, pungent juice. Leaves alternate, 

 exstipulate. Flowers cruciferous, generally in racemes and 

 without bracts. Sepals 4, deciduous ; petals 4, hypogy- 

 nous, with long claws and spreading limbs. 



Stamens 6, the 2 outer opposite ones shorter than the 4 

 interior. The pistil makes a pod which is 2-celled by a 

 false partition, with parietal placenta. When the pod 

 opens, the valves fall away, leaving the seeds attached to 

 the edges of the frame. The whole kernel of the seed is 



