VOL. II.] 



MUSTARD FAMILY. 



141 



2. Draba Caroliniana Walt. Carolina Whitlow-grass. (Fig. 1756 



Draba Caroliniana Walt. Fl. Car. 174. 1788. 

 Draba hispidula Michx. Fl. Bor. Am. 2: 28. 



1803. 



Annual, the flowering scapes i / -5 / high 

 from a short leafy stem. Leaves tufted, ob- 

 ovate, 4 // -io // long, obtuse, entire or rarely 

 with 3 or 4 teeth, pubescent with stiff stel- 

 late hairs; scapes nearly glabrous; flowers 

 white, iW~2 ff broad; petals entire, some- 

 times wanting in the later flowers; pedicels 

 I //_ 2 // long in fruit, clustered at the sum- 

 mit of the scape; pods linear, 4 // -6 // long, 

 nearly i // broad, glabrous; style none. 



In sandy fields, eastern Massachusetts to 

 southern Ontario and Minnesota, south to 

 Georgia and Arkansas. March-June. 



Draba Caroliniana micrantha (Nutt. ) A. Gray, 



Man. Ed. 5, 72. 1867. 



Draba micrantha Nutt; T. & G. Fl. N. A. i: 

 109. 1838. 



Differs from the type only in the appressed- 

 hispidpods. Petals often wanting. Prairies.Il- 

 linois to Texas, New Mexico and Washington. 



3. Draba cuneifolia Nutt. Wedge- 

 leaved Whitlow-grass. 

 (Fig. 1757.) 



Draba cuneifolia Nutt.; T. & G. Fl. N. A. i: 

 108. 1838. 



Annual, stellate-pubescent all over, 4 / -8 / 

 high, branching and leafy below. Leaves 

 obovate, cuneate, or the lowest spatulate, y z '- 

 \Y^ f long, obtuse, dentate toward the sum- 

 mit; flowering branches erect or ascending; 

 flowers white, 2" broad; petals emarginate, 

 twice or thrice the length of the calyx; pedi- 

 cels ascending or spreading, 2 // -4 // long in 

 fruit; raceme elongating; pods linear-oblong, 

 obtuse, 4 // -5 // long, i" wide, minutely hairy; 

 style none. 



In fields, Kentucky to Kansas, south to Flor- 

 ida, west to southern California. Feb.-April. 



4. Draba Fladnizensis Wulf. White Arctic 

 Whitlow-grass. (Fig. 1758.) 



Draba Fladnizensis Wulf. in Jacq. Misc. i: 147. 1778. 

 Draba androsacea Wahl. Fl. Lapp. 174. 1812. 



A low tufted arctic or alpine perennial. Leaves oblanceo- 

 late basal, rosulate, acutish, entire, stellate-pubescent or 

 with some simple hairs, ciliate or rarely nearly glabrous, 4"- 

 8" long; flowers whitish; scapes glabrous; pedicels ascend- 

 ing, i / "-2 // long in fruit; raceme at length somewhat elon- 

 gated; pods oblong, glabrous, 2 // ~3 // long, nearly i" wide; 

 style altrost wanting. 



Gasp6, Quebec, and through arctic America, south in the 

 higher Rocky Mountains to Colorado. Also in arctic and alpine 

 Europe and Asia. Summer. 



