24 ciariKKiMc. (mist.\i{T> famii.v.) 



Synopsis. 



1. STLIQUOS.'E. rniit a siliiinc, A'w -many-sccdcd. 



• Cotj'lL-UoQS flaltcDed, parallel with the partition, one edge applied to the ascendiog radicle 



(accuiubeDt). 

 ■>- Valves of the fruit nervcleiw. 



1. NASTURTIUM. Silique short, nearly teret*-. Seeds iu two rows In each cell. 



2. lOD.VNTllUS. Hili(iue elongated, terete. Seeds in a single row in each cell. 



3. (WKDAMINE. .«ilique linear, compressed. Seeds wingless, in a single row. 



4. DKXTAKIA. Silique lanceolate, c mprcsfed. Seeds wingless, in a single row. 



5. LEAVE.WVOUTIIIA. Silique oblong. Seeds winged. Embryo straight. 



4- 1- Valves of the fruit 1-ncrved. 

 6- AR.\mS. Silique linear, elongated : valves flattened. 



• • Cotyledons flat, with one edge turned toward the partition, and the )>ack of ono < f thcin 



applied to the ascending radicle (incumbent). 



7. SISYMBRIUM. Silique sessile, nearly terete. 



8. WARKA. Silique stalked, compressed. Petals on long claws. 



II. SILICULOS.E. Fruit a silu Ic. 



» Siliclo compressed parallel with the broad partition, or jjlobular. 

 ■1- Cotyledons acrunibent. 



9. DTIADA. rilicle oval or oblong, many seeded valves 1 -.3 nerved. 



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



■*- -t- Cotyledons incumbent. 



11. CAMELTNA. Silicle obovoid : valves l-nerved. 



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



accumbent. 



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



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



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



III. LOilEXTACE^E. Fruit separating transversely into joints. 



15. CAKILE. Fruit 2-jointed. 



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



Silique nearly terete, linear or oblong, or short and silicle-like, usually curved 

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

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

 ers white or yellow, small. 



1. N. tanaeetifolium, Hook. & Am. Smooth; stems diffu.se; leaves 

 pinnatcly divided, with pinnatifid or toothed lobes ; silique oblong-linear, pointed 

 with the short style, twice as long as the pedicel. (Sisymbrium, Walt. S. Wal- 

 teri. Ell.) — Damp soil, East Florida to South Carolina, and westward. March 

 and April. — Stems 6'- 12' long. Flowers minute, yellow. 



2. N. sessiliflorum, Nutt. Smooth; stem stout, erect, branching; leaves 

 oblong-obovate, pinnatifid toward the base, toothed above, obtuse ; silique linear- 

 oblong, pointed with the very short and thick style, four or five times as long as 

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

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



