OF ARTS AND SCIENCES : NOVEMBER 11, 1863. 183 



§ 1. EuSTREPTANTHUS, Encll. Petals with a broad and ample plane 

 lamina. Sepals suberect or erect. Seeds winged. Flowers pretty 

 large, rose-purple. Cauline leaves all sessile and cordate-clasp- 

 ing, glabrous and more or less glaucous. 



* Flowers all subtended by persistent bracts. 



1. S. ERACTEATUS, Gray, Gen. 111. 1, t. 60 ; PI. Lindl. 2, p. 143, 

 & PI. Wright. 2, p. 11. Silique elongated-linear, 6 inches long, spread- 

 ing. Mature seeds not seen. — Texas. 



* * Flowers (or all but the lowest) ebracteate. 



2. S. PLATTCARPUS, Gray, PL Wright. 1. c. Siliques oblong-linear 

 (2J--3 lines wide), very flat, erect. Leaves clasping by rather short 

 and rounded lobes, the lower and radical ones lyrate-pinnatifid. — S. W. 

 Texas. 



3. S. :5iACULATUS, Nutt. in Jour. Acad. Philad. 5, p. 134, t. 7. 

 S. obtusifolius, Hook. Bot. Mag. t. 3317. Brassica Washitana, Muhl. 

 Cat. ? Siliques narrowly linear (only a line wide, 3 or 4 inches long), 

 erect or ascending. Cauline leaves clasping by long and obtuse lobes, 

 making a very deep and neai'ly closed sinus. — Arkansas and E. 

 Texas. 



§ 2. EucLisiA, Nutt. Petals undulate-crisped, the lamina narrow or 

 attenuated, scarcely if at all broader than the claw. Sepals con- 

 nivent, mostly colored, often saccate at the base. The longer 

 stamens often connate. 



* Flowers distinctly pedicelled. Stem not fistulous-inflated. 



•1— Wholly glabrous and mostly glaucous : cauline leaves clasping by a 

 cordate or sagittate base. 



4. S. CARiNATUS, C. Wright, in Gray, PI. Wright. 2, p. 11. Flow- 

 ers purple (half an inch long) ; the urceolate calyx carinately 5- 

 saccate. Pedicels of the flowers and of the broadly linear and flat (half- 

 grown) siliques erect. Radical and lower cauline leaves runcinate- 

 pinnatifid, the upper ones sagittate-clasping, all very glaucous. Seeds 

 unknown. — S. W. Texas, below El Paso. 



5. S. CORDATUS, Nutt. in Torr. & Gray, Fl. 1, p. 77. This, 

 although marked with the exclamation point, as having been authen- 

 ticated, is not preserved in any American herbarium, so far as I can 

 ascertain. It is characterized by Xuttall as having very obtuse leaves, 

 toothed near the summit, the cauline cordate and clasping, greenish- 



