24 cruciferjE. (mustard family.) 



• Synopsis. 



I, STLIQUOSiE. Fruit a silique, few -many-seeded. 



• Cotyledons flattened, parallel with the partition, one edge applied to the ascending ndlele 



(accumbent). 

 ■t- Valves of the fruit nerveless. 



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



2. lODAXTUUS. Silique elongated, terete. Seeds in a single row in each cell. 



3. CAKDAMINE. Silique linear, compressed. Seeds wingless, in a single row., 



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



5. LEAVEN WOUTIUA. SiUque oblong. Seeds winged. Embryo strtdght. 



-4- *- Valves of the fruit 1-nerved. 



6. ARAI5IS. SiUque 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. PTSYMBRIUM. Silique sessile, nearly terete. 



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



II. SILICULOSiE. Fruit a silicic. 



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

 I- Cotyledons accumbent. 



9. DRAI5A. Silicle oval or oblong, many seeded valves 1 - 3-nerved. 



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



■t- -t- Cotyledons incumbent. 



11. CAMELI^'A. Silicle obovoid : valves 1-nerved. 



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



accumbent. 



12. SEXERIERA. Valves of the silicle globular, rugose : seeds sohtary. 



13. LEl'lDIUM. Valves of tbe silicle boat-shaped : seeds solitary. 



14. CAl'SELLA. Valves of the silicle boat-shaped : seeds numerous. 



III. LOMENTACEiE. Fruit separating transversely into joints. 



16. CAKILE. Fruit 2-jointed. 



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



Silique nearly terete, linear or oblong, or short and siliolc-likc, usually carved 

 upward ; tlic valves ncri'cless. Seeds numerous, small, in two rows in caeh cell, 

 not margined. Cotyledons accumbent. — Herbs. Leaves pinuately-lobcd. Flow- 

 ers white or yellow, small. 



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

 pinnately (livi(h(l, with pinuatifid or toothed lobes ; silique oblong-hnear, pointed 

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

 t( ri, /-,'//.) — 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; leave* 

 oblong oliovatf, ]iiniiiiti(i(l toward the base, toothed above, obtuse ; silique linear- 

 oblong, poinl'-d with the very short and thick style, four or five times as long an 

 the pedicel. — Hanks of the Apaiachicola River, Florida and westward. Febru- 

 ary - April. (C; — Stem 1° - 2° hi-h. Flowers minute, yellow. 



