CRUCIFERJE. (MUSTARD FAMILY.) C9 



brous in the /(Mowing spt cit s, t xcept the base of the sh m and tfo Una r or tuft of 

 radical leaves, these mostly hirsute.) 



10. A. perfoliata, Lam. (Toweb Mdstakd.) Tall (2° - 4° high) ; 

 glaucous ; stem-leaves oblong or ovateJanceolate, entire, half-clasping by the 

 sagittate base; petals yellowish-white, little longer than the calyx; pot/* very narrow 

 (3' long) and pedicles strictly erect. (Turritis glabra, L.) — Rocks and fields, 

 scarce and perhaps introduced southward ; more common northward. (En.) 



11. A. Drummondii, Gray. Scarcely glaucous, l°-2° high ; *'""- iw. . 

 leaves lanceolate or oblong-linear &nd sagittate (1' -2' long) with narrow auricles, am 

 or the lowest spatulate ; petals white or rose-color, fully twice tin- length of the calyx; 

 pedicels and flat pods loosely erect, or ascending, or even spread! ni/ ; seeds wing- 

 margined, when mature little narrower than the partition. (Turritis stricta, 

 Graham.) — Rocky places, from the St. Lawrence in Canada East, to Lewi-ton 

 (Clinton), Lake Superior, and northwestward; also "Chenango Co. New 

 York," Northern Illinois, Vasey. — Pods 2i'- 3 J' long, or invar. (T. brachy- 



carpa, Ton: Sr Gray) only l'-2' long. 



6. BAR BARE A, R.Br. Winter Cress. 



Pod linear, terete or somewhat 4-sided ; the valves being keeled by a mid- 

 nerve. Seeds in a single row in each cell, marginless. Cotyledons accumbent. 

 — Mostly biennials resembling Nasturtium ; flowers yellow. (Anciently called 

 The Herb of St. Barbara.) 



1. B. vulgaris, H. Br. (Common Winter Cress. Yellow Rocket.) 

 Smooth ; lower leaves lyrate, the terminal division round and usually large, the 

 lateral 1 -4 pairs or rarely wanting ; upper leaves obovate, cut-toothed, or pin- 

 natitid at the base; pods erect or slightly spreading; or in var. stricta, ap- 

 pressed ; in var. arcuAta, ascending on spreading pedicels. — Low grounds 

 and roadsides : apparently introduced, but indigenous from L. Superior north- 

 ward and westward. (Eu.) 



2. B. ru.ECOX, R. Br. (Early Winter C), with 5-8 pairs of lateral lobes 

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

 ety of the other, — somewhat cultivated from New York southward as a winter 

 salad, under the name of Scurvy-Grass, — is beginning to run wild. (Eu.) 



7. ERYSIMUM, L. Treacle Mustard. 



Pod linear, 4-sided ; the valves keeled with a strong midrib. Seeds in a sin- 

 gle row in each cell, oblong, marginless. Cotyledons (often obliquely) incum- 

 bent. Calyx erect. — Chiefly biennials, with yellow flowers ; the leaves not 

 clasping. (Name from epJco, to draw Misters.) 



1. E. cheiranthoid.es, L. (Worm-seed Mustard.) Minutely rough- 

 ish, branching, slender ; leaves lanceolate, scarcely toothed ; flowers small : pods 

 small ami short (7"- 12" long), very obtusely angled, ascending on slender di- 

 vergent pedicels. — Banks of streams, New York, Penn., Illinois, and northward. 

 July. (Eu.) 



2. E. asperum, DC, var. Arkansanum, Nutt. (Western Wall- 

 flower.) Minutely roughish-hoary ; stem simple; leaves lanceolate, some- 



