MUSTARD FAMILY 



Voi,. II.] 



8. Draba brachycarpa Nutt. Short- 

 fruited Whitlow-grass. (Fig. 1762.) 



Draba brachycarpa Nutt. ; T. & G. Fl. N. A. i : 108. 1838. 



Annual, tufted, 2 / -5 / high, loosely stellate-pubes- 

 cent, leafy to the inflorescence. Basal leaves ovate 

 or obovate, 4 // -6 // long, obtuse, sparingly dentate 

 or entire; stem-leaves smaller, sessile, oblong, en- 

 tire; pedicels ascending, i // -2 // long in fruit; 

 raceme elongating; flowers yellow, \" broad; 

 petals somewhat longer than the calyx, sometimes 

 wanting; pods oblong, acute, \W-z" long, y 2 ff 

 broad; style minute. 



Dry hills and fields, Virginia to Illinois and Missouri, 

 south to Georgia and Louisiana. March-May. 



9. Draba nemorosa I,. Wood Whitlow- 

 grass. (Fig. 1763.) 

 Draba nemorosa L. Sp. PI. 643. 1753. 



Annual, loosely stellate-pubescent, 6 / -i2 / high, 

 branching below, leafy to the inflorescence. Leaves 

 oblong-ovate, or lanceolate, obtuse, sessile, dentate, 

 the lower io' / -i2 // long, 5"- 1 }" wide, the upper 

 smaller; flowers yellow, fading to whitish, i // broad; 

 petals notched, slightly exceeding the calyx; pedi- 

 cels divaricately spreading in fruit, glabrous, 3 // -io // 

 long; racemes open, much elongating; pods pubes- 

 cent, or nearly glabrous, oblong, obtuse, 3 // -4 // long; 

 style none. 



Western Ontario, Michigan and Minnesota to Oregon, 

 arctic America and in the Rocky Mountains. Also in 

 northern Europe and Asia. Summer. 



10. Draba aurea Vahl. Golden Whitlow- 

 grass. (Fig. 1764.) 



Draba aurea Vahl in Hornem. Fl. OEcon. Ed. 2, 599. 

 1806. 



Perennial, pubescent throughout with stellate 

 and simple hairs; stem branching or nearly simple, 

 S'-io' high, leafy to the inflorescence. Basal leaves 

 oblanceolate or spatulate, 6 // -i2 // long, obtuse or 

 acutish, slightly dentate or entire, often ciliate at 

 the base; stem-leaves oblong or lanceolate, acute; 

 pods lanceolate or oblong-lanceolate, 4 // -6 // long; 

 flowers yellow, 2" broad; petals twice the length of 

 the calyx, emarginate or entire; pods acute, pubes- 

 cent or rarely glabrous, at length slightly twisted, 

 4 // -7 // long, on erect pedicels one-half their length; 

 style stout, }/ 2 " long. 



Mignon Island, Gulf of St. Lawrence to Greenland; 

 arctic America and in the Rocky Mountains south to 

 Arizona. Summer. 



