122 CRUCIFER.E Synthlipsis. 



— PI. Feiidl. 116, & Bot. Mex. Bound. 34; Baill. Hist. PI. iii. 282; Prantl, 

 1. c, [By B. L. Robinson,] 



S. Greggii, Gray, 11. cc. Canescent-toraentose, rarely smoothish : root single : stems sev- 

 eral, slender, elougated, spreading, simple or branched ; leaves ovate, few-tootlied, slender- 

 petioled or subsessile by a narrowed base : racemes in fruit 6 inches or more in length ; 

 pedicels 3 to 4 lines long, widely spreading but commonly somewhat ascending: sepals 

 narrow, linear, spreading in anthesis : petals roseate or white, 4 lines long, with a broad 

 rounded lilade : capsules suberect, broadly oblong, wing-appendaged and obcordate at sum- 

 mit, rounded or subcordate at base, 5 lines long, two thirds as broad. — Wats. 1. c. 322 ; 

 Coulter, Contrib. U. S. Nat. Herb. iv. 21. — Collected several times upon the Mexican side of 

 the Lower Rio Grande, Berlandier, and doubtless extending into Southwestern Texas. 

 ( Coahuila, Gregg, Palmer ; San Luis Potosi, Schaffner, Parry & Palmer, Pringle.) 



S. Berlandieri, Gray. Spreading habit of the preceding, finely stellate-pubescent : leaves 

 more deeply sinuate-toothed or shallowh' piunatifid : pedicels longer and usually recurved, 

 6 to 8 lines in length : flowers yellowish or purplish, probably changing color with age : 

 fruit orbicular, 3 lines in diameter, neither wing-appendaged nor notched, commonly 

 deflexed. — Bot. Mex. Bound. 34; Walp. Ann. vii. 171. S. heterorhroma, Wats. 1. c. 321, ap- 

 pears insufficiently separated. — Similar situations as the last, S. W. Texas, Neullet/, Heller. 

 Passing into var. hispida, Wats. 1. c, with stem more or less hirsute with simple hairs, 

 which partially replace the stellate tomentum. — Laredo, Texas, Berlandier. (Mexico, 

 Palmer.) 



10. LiYROCARPA, Hook. & Harv. {Avpa, a lyre, and Kapiros, fruit.) — 

 Erect annual or perennial herbs with fine stellate pubescence. Leaves toothed 

 or runcinately pinnatifid : sepals long and narrow, linear-oblong : caj^sule broadly 

 obcordate or with rounded ear-like appendages on each side of the subtruncate 

 end. — Lond. Jour. Bot. iv. 76, t. 4; Benth. & Hook. Gen. i. 93. [By B. L- 

 Robinson.] 



L. Coulteri, Hook. & Harv. 1. c. Distinctly perennial: stems several, 1^ to 2 feet high, 

 sparingly branched : leaves lyrately pinnatifid, 1 to 2 inches long, petioled ; terminal 

 segment triangular or 5-lobed, acute, much exceeding the (sometimes obsolete) lower seg- 

 ments : flowers 8 to 10 lines broad, in a loose raceme, sweet-scented: pedicels spreading, 

 shorter than the slender calyx : blades of the petals linear or lance-linear, attenuate : capsule 

 oblong, 8 lines in length, conspicuously bi-auriculate above. — Brew. & Wats. Bot. Calif, i. 

 44; Wats. Proc. Am. Acad. xxiv. 39; Brandegee, Bull. Calif. Acad. Sci. ser. 2, ii. 127. — 

 Ascribed to California from Dr. Thomas Coulter's original specimens so labelled, but with- 

 out exact locality, and perhaps from Lower California, where the species is not infrequent. 

 Also collected near the southern boundary of Arizona, Pringle. Flowers said to be sweet- 

 scented in the evening and of ochroleucous color. (Sonora, Lower Calif.) 

 L. Pi-LMERi, Watson (Proc. Am. Acad. xi. 123), from Tantillas Mountains, but a few 



miles south of the Californian boundary, may be expected in the southern part of that State, 



and can be readily recognized by its broadly obovate obcordate pods only 3 or 4 lines in length. 



Still a third species, from Cape St. Lucas, with much l)roader bright purple petals, has been 



recently added to the genus. 



11. DITH"^REA, Harv. (At?, two or double, and ^vpeos, shield; the 

 name intended as a Greek equivalent of Biscutella, a Mediterranean genus of 

 similar asjiect.) — A small genus of cinereous-tomentose plants of the Southwest, 

 habitally and in fruit considerably resembling BiscuteUa, but differing markedly 

 in their sessile or subsessile stigmas and dense stellate pubescence, as well as in 

 widely different geographic position. — Harv. in Hook. Lond. Jour. Bot. iv. 77, 

 t. 5; Prantl in Engl. & Prantl, Nat. Pflanzeuf. iii. Ab. 2, 187. Under Biscu- 



