cruciferje. 605 



Order CRUCIFER^. 

 NASTURTIUM, R. Br. 



"N. sylvestre, R- Br. Stem ascending; leaves pinnately divided fnto 

 narrow toothed lobes; silique linear, mostly shorter than the slender pedicel; 

 style very short; petals yellow, longer than the calyx. — New Orleans. 

 Introduced. 



N. obtusum, Nutt. Stem short, widely branched ; leaves oblong, pin- 

 natifid, the oblong or roundish lobes sparingly toothed ; racemes barely as 

 long as the leaves, minutely many-flowered; silique oblong, obtuse, or 

 pointed by the short style, twice as long as the slender pedicel ; petals minute, 

 yellowish. — Banks of the Mississippi. 



N. limosum, Nutt. " Very smooth ; leaves lanceolate, laciniately pin- 

 natifid towards the base, nearly entire above, or angularly toothed, tlie lobes 

 serrate or entire ; pedicels much siiorter than the short silique ; stigma nearl}' 

 sessile." — New Orleans (N'uttalt). 



CARD AMINE, L. 



C. Clematitis, Shuttlw. Smooth; earliest leaves reniform, nearly entire ; 

 lower stem leaves broadly 3-lobed, the middle lobe larger, reniform-cordate, 

 or angularly 3-lobed ; upper ones oblong, 3-lobed ; petioles with an arrow- 

 shaped appendage at the base ; racemes short, loose ; petals white, twice as 

 long as the calyx ; silique narrow-linear, compressed, tipped with the long 

 style. — Moist banks. Mountains of North Carolina and Tennessee. June. — 

 Stem 6'- 12' high. 



C. CUrvisiliqua, Shuttlw. Stem ascending from a creeping base(^°- 

 1|° high), smooth, soon branching; leaves pinnately divided into 3-8 oval 

 or obovate wavy-margined lobes, rarely entire, the lobes of the upper ones 

 narrower and sometimes toothed; petals white, spatulate-obovate, twice as 

 long as the sepals ; style short ; silique filiform, terete, incurved ; seeds oval 

 or roundish. — Margins of ponds, &c., St. Marks {Rugel). East Florida 

 ( Garber). 



LEAVENWORTHIA, Torr. 



L. torulosa. Gray. Silique linear, torose ; style fully equnlling the 

 breadth of the silique ; seeds broadly oval, narrowly winged ; radicle nearly 

 transverse, strictly applied to the edges of the cotyledons at the base on one 

 side; petals purplish with a yellow base.— Cedar barrens, Tennessee (Dr. 

 Gattinfffr). 



L. Stylosa, Gray. Slender, strictly stemless ; silique oval or broadly 

 oblong (4" long), plane, surmounted by a slender style of fully 2 lines in 

 length ; seeds only 3-6, orbicular, distinctly winged ; embryo as in the pre- 

 ceding ; petals pure golden yellow. — With the preceeding. 



The above-described species, submitted by Dr. Gray for future determi- 

 nation, appear to me to be quite distinct. 



