15 
15. Synthlipsis. Pod oblong-elliptical, emarginate, with acutely keeled winged 
valves, and many seeds. 
II. Pod of 2 indehiscent cells, separating at maturity from the persistent axis, 
16. Biscutella. Cells flat, nearly orbicular: flowers rather large: stigma dilated 
or conical. 
III. Pod inde hiscent, continuous or of 1-celled joints. 
17. Cakile. Pod short, 2 jointed: joints 1-seeded. 
18. Raphanus. Pod vlongated, several-seeded, continuous or constricted between 
the seeds. 
1. THELYPODIUM Endl. 
Mostly stout and coarse biennials, with white or rose-colored flowers, 
Sagittate curved anthers, long-linear mostly terete pods with mostly 
1-nerved valves and oblong seeds in one row. The cotyledons are more 
or less incumbent (||). 
* Leaves all entire and atten uate at base. 
1. T. linearifolium Watson. Glabrous, 3.dm. or more high: leaves linear, the 
lowermost lanceolate, acutish, sessile, 3.5 to 5 em. long: flowers showy, 12 mm. or 
less high, rose-purple : pods erect, on spreading pedicels, very slender, 5 to 6 cm, long, 
with very short style.—In the mountains of extreme western Texas. 
** Leaves toothed or pinnatifid (at least the radical ones), 
+ Leaves attenuate to a petiole. 
2. T. micranthum Watson. More or less stellate-pubescent (or even quite gla- 
brous), 3 to9 dm. high: lower and stem leaves oblanceolate, sinuately pinnatifid, 
stellate-pubescent, the upper linear, entire, usually glabrous: flowers small, 2 to 3 mm. 
long: calyx glabrous or pubescent: pod slend er, about 2.5 cm, long, sessile, with a 
very short thick style. (7, longifolium of most authors, but not of Watson, which 
seems to be a Mexican species. )—In the mountains of extreme western Texas. 
3. T. Wrightii Gray, Glabrous or nearly so, 6 to 9 dm. high: leaves broadly lan- 
ceolate or lanceoiate-oblong, all pinnatifid, repand-toothed, or denticulate: flowers 
larger and rose-color : pod slender, elongated, becoming 5 to 7.5 em. or more long, very 
shortly stipitate.—In the mountains of extreme western Texas, 
+ + Leaves auriculate clasping. 
4. T. Vaseyi Coulter. Glaucous and glabrous thronghout, 6 to 9 dm, high: leaves 
thin, oblanceolate, narrower above, entire or lower leaves somewhat repand-denticu- 
late, clasping by roundish auricles: flowers very small, about 3 mm. high, white: 
pod very slender, becoming distant and ascending or erect, 3.5 to more than 5 cm, 
long. (See Plate 1.)—Near Rio Grande City aud also in the mountains of New Mexico, 
Doubtless to be found at intermediate stations in the neighborhood of the Rio Grande, 
5. T. auriculatum Watson. Sparingly pilose, 6 to 9 dm. high: leaves lyrate-pin- 
natifid, somewhat runcinate, stem leaves with two round stipuliform clasping auricles 
remote from the lower proper lobes: flowers 6 mm. long, white: pod slender, widely 
spreading, or ascending on divaricate pedicels, 3.5 em. long, with 3-neryed valves, 
but the midnerve more prominent (Sisymbrium auriculatum Gray ).—In the mountains 
of extreme western Texas, 
2. ERYSIMUM Tourn. 
Mostly pubescent biennials, with leaves not clasping, yellow flowers, 
Sagittate (but not coiled) anthers, linear 4-sided pods, oblong seeds in 
gue row, and broadly lobed stigma, 
