2 1 CRUCIFERiE. (MUSTABD FAMILY.) 



Synopsis. 

 I. STLIQUOSJE. Fruit a suique, few -many-seeded. 



* Cotyledons flattened, parallel with the partition, one edge applied to the ascending radicle 



(accuuibent). 

 +- Valves of the fruit nerveless. 



1. NASTURTIUM. Silique short, nearly terete. Seeds in two rows in each cell. 



2. IODANTHUS. Sili<jue elongated, terete. Seeds in a single row in each cell. 

 ;:. ( ' \I!I»AMIXE. Silique linear, compressed. Seeds wingless, in a single row. 



4. DENTAUIA. Silique lanceolate, compressed. Seeds wingless, in a single row. 



5. LEAVEMVOKT1IIA. Silique oblong. Seeds winged. Embryo straight. 



•i- n- Valves of the fruit 1-nerved. 



6. ARABIS. Silique linear, elongated : valves flattened. 



* * Cotyledons flat, with one edge turned toward the partition, and the back of one of them 



applied to the ascending radicle (incumbent). 



7. SISYMBRIUM. Silique sessile, nearly terete. 



S. WAREA. Silique stalked, compressed. Petals on long claws. 



II. SLLICULOSiE. Fruit a silicic. 



* Siliclo compressed parallel with the broad partition, or globular. 

 +- Cotyledons accumbent. 

 9. DRAB A. Siliclo oval or oblong, many seeded valves 1 - 3-nerved. 



10. VESICARIA. Silicic orbicular, few-seeded : valves nerveless. 



+- -i- Cotyledons incumbent. 



11. CAMELINA. Silicle obovoid : valves 1-nervcd. 



* * Silicle compressed contrary to the narrow partition. Cotyledons incumbent, rarely 



accumbent. 



12. SENEBIERA. Valves of the silicle globular, rugose : seeds solitary. 



13. LEl'IDIUM. Valves of the silicle boat-shaped : seeds solitary. 



14. CAPSELLA. Valves of the silicle boat-shaped : seeds numerous. 



HI. LCTaIEXTACE^E. Fruit separating transversely into joints. 



15. CAKILE. Fruit 2-joiuted. 



1. NASTURTIUM, R.Br. Water-Cress. 



Silique nearly terete, linear or olilon^, or short and Bilicle-like, usually curved 

 upward ; the valves nerveless. Seeds numerous, small, in two rowa in each cell, 

 not margined. Cotyledons accumbent — Herbs. Leaves pinnately-lobed. Flow- 

 ers white or yellow, small. 



1. N. tanacctifolium, Hook. '& Am. Smooth; stems diffuse; leaves 

 pinnatelj dh ided, \\ ith pinnatifid or toothed lobes ; silique oblong-linear, pointed 

 with the short Btyle, twice as long as the pedicel. (Sisymbrium, Walt. S. W.il- 

 teri, /.'//.) - Damp Boil, East Florida to South Carolina, and westward. March 

 and April. — Stems •'>'- 12' long. Flowers minute, yellow. 



2. N. sc88iliflorum, Nutt. Smooth; stem stout, erect, branching ; Naves 

 oblong-obovate, pinnatifid toward the base, toothed above, obtuse ; Bilique huear- 

 oblong, pointed with the very Bhort and thick Btyle, tour or five times as Ic 



the pedicel.— Bani of the Apalachicola River, Florida and westward. Febru- 

 ary-April. Q3 — Stem 10-2° high. Flowers minute, yellow. 



