(MUSTARD FAMILY.) 71 



B. PR.KCOX, R. Br. (EAKLV WINTER ('.), with 5-8 pairs of lateral lobes 

 to the leaves, and longer pods on very thick pedicels, yet probably only a 

 variety of the other, somewhat cultivated from X. Y. southward as a winter 

 salad, under the name of Sci RVY-GRASS, is beginning to run wild. (Eu.) 



13. HE S PERIS, Tourn. ROCKET. 



Pod linear, nearly cylindrical; stigma, lohed, erect. Seeds in 1 row in each 

 cell, ol,lon u -, marginless. Cotyledons incumbent. Biennial or perennial, 

 with serrate sessile or petiolate leaves, and lar-v purple flowers. (Name from 

 eo-Tre'po, evening, from the evening fragrance of the flower.-.) 



H. MATitoNAi.is, L. (DAML'S \'I..U:T.) Tall; leaves lanceolate, acuminate, 

 mostly petiolate; pods 2-4' long, spreading. Sparingly naturalized. (Xat. 

 from Eu.) 



14. ERYSIMUM, Tourn. TREACLE MI-STAKI.. 



Pod linear, 4-sided, the valves keeled with a strong midrib; stigma broadly 

 lolx-d. Seeds iii 1 row in each cell, oblnng, marginless. Cotyledons (often 

 obliquely) incumbent. Chiefly biennials, with yellow flowers; the leaves not 

 clasping. Pubescence of appres.-ed 2-3-parted hairs. (Xame from tpvto, to 

 drtnr l>/ist<-rs.) 



1. E. asperum, DC. (WESTERN WAM.-KI.OWER.) Minutely ronghish- 

 hoary : stem simple, leaves lanceolate to linear, entire or somewhat toothed; 

 por/.s iHiirli/ erect or widelv -piv;iding ,,n n/mrt j il/r, /\. f-/nin/iited (3-4' long), 

 exactly 4-sided; stigma 2-lobe-d. Ohio (on limestone cliffs) to 111., Ark., 

 Dak., and common westward. June, July. 1'lant stout, 1-2 high; the 

 crowded bright orange-yellow flowers as large as those of the Wall-flower. 

 Petals orbicular, on very slender cla\\s. 



2. E. cheiranthoides, L. (WOI:M-SEED MI-STARD.) Minutely rough- 

 ish, lirancliing, slender; leaves lanceolate, scarcelv toothed; flowers small; 

 ]><n1s small ami slmrt (7- 12" long), \er\ ol,tn.--l\ angled, ascending on slender 

 divergent pedicels. Banks of streams, Ma.->. to J'emi., Minn., and northward. 

 July (Eu.) 



3. E. parvifldrum, Xutt. Stem erect, often simple; leaves linear- 

 oblanceolate, entire or the lo\\-est coarsely toothed ; flowers small (3" long) ; 

 pods narrow, 1-2^' long, ascending on short pedicels. Minn, to Kan. and 

 westward. 



15. SISYMBRIUM, Tourn. HEDGE MUSTARD. 



Pod terete, flattish or 4 - 6-sided, the valves 1 - 3-nerved ; stigma small, 

 entire. Seeds oblong, marginless, in 1 or 2 rows in each cell. Cotyledons 

 incumbent. Calyx open. Flowers small, white or yellow. Pubescence 

 spreading. (An ancient Greek name for some plant of this family.) Ours 

 are mostly annuals or biennials. 



1. S. hlimile, Meyer. Perennial, branching from the base, sparingly 

 pubescent, 6' high or less; lea\es narrowly oblanceolate, mostly coarsely and 

 sharply toothed ; flowers white or rose-color ; pods very narrow, subterete, 

 4-9" long, ascending on short pedicels, beaked with a short style, seeds 

 1 -ranked. (Arabis petra-a, Mn., not Lam.) Willoughby Mountain, Vt.; 

 Canada and westward. (X. Asia.) 



