162 THE FLORA. 



** Plants growing wild^ or cultivated for food. 



„ . .,. ,, , , , . ( flowers yellow 8 



1 Fnut a Bihque, 2-celled lengthwise, \ ^^^^^^ ^^^.^^^ p^^^.p^^^ ^^ ^ 



1 Fruit a silicle, 2-celled lengthwise, \ . ^,. '***, o 



( flowers white, purple, &c 2 



I Fruit a jointed pod, with the partitions crosswise. . . .11 

 2 Silicle flattened or turgid, with a broad partition 4 



2 Silicle flattened contrary to the narrow partition. . . .3 



3 Silicle triang., seeds several in each cell. S/iepTierd-s-puree. Ca.psel'la. S 



3 Silicle roundish, with one seed in each cell. Pepper-grass. Lepip^ium. 4 



3 Silicle double, with one seed in each lobe. S. Swine Cress. Senebik'ra. 5 



4 Silicle flattened. Leaves cauline or radical. WJiitlow-grass. Draba. 6 



4 Silicle turgid. Leaves cauline. Horse Radish. Aemora'cia 



4 Silicle turgid. Leaves all radical. r. Awhcort. Subula''ria. 



5 Silicle obovoid, i.e., inversely egg-shaped, turgid. False Flax. Cameli''na. 

 5 Sil. globose, turgid, membranous. Style long. Bladder-pod. Vesiga'ria. 

 5 Silicle oblong, turgid, and somewhat terete. Cress. Nastur''tium. 



6 Seeds arranged in two rows in each cell, not winged. Cress. Nastur'tiuji. 



6 Seeds in two rows in each cell, wing margin. Tower-miietard. Tur'ritis. 



6 Seeds arranged in a single row in each cell 7 



7 Sil. linear, flattish, each valve with 1 central vein. Roch Cress. Ar'abis. i 

 7 Silique lanceolate, flat, the valves veinless. Tootli-root. Denta'ria. 8 



7 Siliques linear, veinless, terete. Flws. purple. False Rochet. Iodan'thus. 

 7 Siliques linear, veinless, flat. Fls. whitish. Cuckoo- jiov}er. Cardami''ne. 9 



8 Seeds ovate or oblong. . . .9 



8 Seeds globose 10 



8 Seeds flat, with a broad, winged margin. S. Leavenworth'ia. 



9 Calyx i-open. Lvs. runcinate, or finely dissect. Hedge-mustard. Sisym'brium. 

 9 Calyx closed. Leaves lyrate-pinnatifid. Winter Cress. Barba'rka. 10 



9 Calyx closed. Leaves lanceolate. False Wall-flower. Erys'imum. 11 



10 Ciilyx spreading. Valves of the pod 1-3- veined. Mustard, Sina^pis. 12 



10 Calyx mostly erect. Valves of the pod 1-veined. Cabbage, dtc. Bras'sica. 



II Pods short, 2-jointed, with 1 seed in each joint. Sea-rocket. Caki'ee. 

 11 Pods with several transverse joints and cells. Radish. Raph^anus. 



1. IBE'RIS. Candy- tuft. 



The two outside petals larger than the two inside ones. Pods flattened, 

 truncate, emarginate, the cells one-seeded. — Foreign, ornamental plants. 

 1 Flowers white. Plain about If. high .... 2-4 

 1 I. umbella'ta. Purple C. Fls. purple, in umbels. Lvs. serrate, upper entire. 



2 I. ama'ra. Bitter C. Corymbs lengthening into racemes. Lvs. slightly toothed. 



3 I. piiina'ta. Wing-leaved 0. Corymbs scarcely lengthening. Leaves pinnatifid. 



4 I. saxat'ilis. Rock C. Corymbs not lengthening. Shrubby. Lvs. linear, entire. 



