150 CRUCIFER^. Barbarea. 



B. stricta, Andrz. Iu its variable foliage uot satisfactorily distinguishable from the pre- 

 ceding : flowers smaller, paler yellow, during authesis closely aggregated and subcorymbose : 

 petals usually not over a third or half longer than the calyx : pods mostly appressed to the 

 elongated rhachis. — Andrz. in Bess. Euum. 72; Reichenb. Ic. Fl. Germ. ii. 47. B. parvi- 

 flora, Fries, Novit. ed. 2, 207. B. vulgaris, var. stricta, Gray, Man. ed. 2, 35. — Same range 

 as the last, and eastward the commoner species. A noteworthy fruiting form of this 

 species or perhaps distinct plant has been collected at Seattle, Wash., Piper. It has 

 elongated rather loose racemes of very short erect pods (4 to 7 lines long), and bears a close 

 resemblance to specimens from Central France 



B. PE-Ecox, R. Br. 1. c. (Early Winter Cress, Scurvy Grass.) Very similar in habit 

 and floral characters : radical lea\'es usually interruptedly pinnate ; segments more nimier- 

 ous, 4 to 8 pairs, commonly with smaller ones between the larger : siliques longer, often 2~> 

 inches in length, larger and firmer in texture : valves more strongly carinate ; fruiting 

 pedicels very stout. — Chapm. Fl. ed. 2, 606; Wats. & Coulter in Gray, Man. ed. 6, 71. — 

 Somewhat established in the Middle Atlantic States and southward, having escaped from 

 cultivation as a salad plant. (Introd. from Eu.) 



36. IODANTHUS, Torr. & Gray. {'IwSrj^, violet-colored, and ^vOos, 

 flower.) — A small American genus of ratlier doubtful affinities; but on account 

 of its stigma elongated over the placentae, its distinctly flattened pods and nearly 

 accumbent cotyledons, not to be united with Thelypodium, to which it has been 

 reduced. — Fl. i. 72 (under GheirantJius) ; Gray, Gen. 111. i. 133, t. 54; Proc. 

 Am. Acad. vi. 188; Benth. & Hook. Gen. i. 70; Prantl, 1. c. 183. Under 

 Thelypodium, Wats. Bibl. Index, 73 ; Wats. & Coulter in Gray, Man. ed. 6, 

 72. — A single described species, but probably with a Mexican congener. [By 

 B. L. Robinson.] 



I. pinnatifidus, Steud. Erect, slender, leafy, glabrous, often branched above : root a 

 cluster of tough fibres : radical leaves ovate, rounded at the base or cordate, sleuder-petioled ; 

 the cauline ovate-lanceolate, acuminate at each end, usually sharply and often doubly 

 serrate, sometimes merely repand ; the upper sessile hy narrow auriculate bases ; tlie lower 

 petiolate and occasionally pinnate, bearing 1 to 3 pairs of small leaflets near the base : 

 sepals 1-J lines long, less than half the lengtli of the spatulate slender-clawed purple petals : 

 fruit 9 to 1.5 lines long, short-pedicelled, tijjped with a slender style, wideh' spreading iu 

 elongated racemes. — Nomencl. ed. 2, 812; Gray, Proc. Am. Acad. vi. 188; Wats. Bot. 

 King Exp. 19; Prantl, 1. c. I. Iiesperidoides, Torr. & Gray in Gray, Gen. 111. i. 134, t. 54, 

 & Man. 33; Chapm. Fl. 25. Hesperis pinnatijida, M'lchx. F]. ii. 31. Cheirantlius Iiesperi- 

 doides, Torr. & Gray, Fl. i. 72. Arabis Iiesperidoides, Gray, Man. ed. 5, 68. — Rich soil, 

 W. Pennsylvania, Porter, to Texas, Lindheimer, and northward to Minnesota ; fl. June ; f r. 

 July and August. 



37. DRY0P£;TAL0N, Gray. (Name from hpvs, an oak tree, the lobed 



petals resembling an oak leaf in outline.) — A branching annual with lyrately 



pinnatifid mostly radical leaves and pubescence of simple hairs. Petals white. — 



PI. Wright, ii. 11. Dryopetalum, Prantl in Engl. & Prantl, Nat. Pflanzenf. iii. 



Ab. 2, 183. — A southwestern monotype. [By S. Watson.] 



D. runcinatum, Gray. A foot high, glabrous above, more or less villous below with 

 spreading hairs (sometimes short and dense) : segments of the leaves irregularlj^ rounded to 

 oblong, coarsely and acutely or sinuately toothed, of tlie cauline leaves narrower : pedicels 

 of the elongating racemes slender, divaricate, usually equalling the flowers, in fruit 2 to 8 

 lines long: petals 5-7-toothed, 2 to 3 lines long: pods very narrow, nearly straight, spread- 

 ing, 1 to U inches long. — PI. Wright, ii. 12, t. 11 ; Torr. Bot. Mex. Bound. 32. — Moun- 

 tains of W. Texas, TJiurher ; S. Arizona, Wright, Thurher, Palmer, Greene, Parish, Pringle. 

 (The type from Chiiiuahua, Wright.) 



