APPENDIX. 
SYNOPSES OF GENEEA. 
STEEPTANTHUS. 
The synopsis of this genus given by Dr. Gray in Proc. Amei: Acad., Vol. VI., pp. 182-188, (1863,) is 
retained, with the necessary changes indicated in the note upon StrejUanthus on page 19. A single more 
recent species is added. 
§ 1. EUSTEEPTANTHUS, Endl. Petals witli a broad and ample piano lamina ; sepals suberect or 
erect ; flowers rather largo, rose-purple ; cauline leaves all sessile and cordate-clasping, glabrous 
and more or less glaucous. 
* Flowers all subtended by persistent bracts. 
1. S. BRACTEATUS, Gray. Siliquo elongated-linear, 6' long, spreading ; mature seeds not known.— 
Texas. 
* * Flowers (or all but the lowest) ebracteate. 
2. S. PLATYCARPUS, Gray. Siliqnes oblong-linear, 2|-3" wide, very flat, erect; leaves clasping by 
rather short and rounded lobes, the lower and radical ones lyrate-pinnatifid. — S. W. Texas. 
3. S. MACULATUS, Nutt. Siliqucs narrowly linear, 3-4' long and 1" wide, erect or ascending ; cauline 
leaves clasping by long and obtuse lobes, the sinus very deep and nearly closed.— Arkansas and E. Texas- 
^ 2. EUCLISIA, Nutt. Petals undnlate-crisped, the lamina narrow or attenuated, scarcely if at all 
broader than the claw ; sepals connivent, mostly colored, often saccate at base ; the longer sta- 
mens often connate. 
Wholly glabrous and mostly glaucous, 
(a.) Cauline leaves clasping by a cordate or sagittate base. 
4. S. CARINATUS, Wright. Flowers purple, i' 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. 
5. S. coRDATUS, Nutt. Leaves thick, obtuse, toothed only at the apex. See page 19. 
6. S. TORTUOSUS, Kell. Stem paniculately branched, or simple, 1-2° high ; leaves entire or denticu- 
late, the cauline suborbicular, cordate-clasping with a closed sinus ; flowers purple or yellowish, 6" long, 
in a lax raceme, the spreading or ascending pedicels 2-3" long, the lowest often leafy-bracted ; buds and 
sepals usually long-acuminate ; silique narrowly linear, 2-3' long, 1" wide, falcately recurved-sprcading, 
short-stipitate; seeds "winged" or wingless.— California. 
7. S. Breweri, Gray. Annual, 9'-2° high, branched from near tlie base, glabrous and glaucous ; 
cauline leaves, except the lowest, strongly cordate-clasping with a closed sinus, entire or denticulate, the 
uppermost sagittate; flowers purple, on very short ascending pedicels, the lowest often leafy-bracted; 
buds 3" long, obtuse or acutish, the sepals with scarious recurved blunt tips, sometimes downy ; silique 
narrowly linear, 11-2^' long, less than 1" wide, ascending or erect, straight or slightly incurved, com- 
pressed but torulose ; seeds wholly marginless.— California. 
(6.) Cauline leaves not cordate nor auriculate at base, entire or very obscurely toothed ; sepals not 
dissimilar. 
8. S. HYACEfTHOiDES, Hook. Leaves linear-lanceolate and oblong-linear ; flowers in a virgate ra- 
ceme,* spreading and soon pendulous, green and violet-purple ; calyx cylindraceous ; siUques erect- 
spreading, 2-4' long, 1" wide ; seed narrowly margined.— E. Texas and S. W. Arkansas. 
(c.) Leaves filiform, entire, some of them sagittate with a subclasping base ; two outer sepals 
broadly dilated. 
