Jones: Flora of Illinois, 72. Capparidaceae 143 



24. Lesquerella Wats. — Bladder-pod 



1. Pods, as well as the whole plant, densely stellate-pubescent; plants perennial; 

 in sand or sandy soil, w. III., rare. Havana, Mason Co., Aug. 22, 1904, 

 Glectson [L. ludoviciana (Nutt.) Wats.] L. argentea (Pursh) MacM. 



l.Pods glabrous; plants annual, sparsely stellate-pubescent. "By the Chicago 

 & Alton R.R. near Rock Bridge, s. of Willow Springs, June 9, 1894," 

 Hill; east of Sag Bridge, June 9, 1894, Moffatt 172 ("only two plants 

 found; fruit immature."); native in Okla. and Tex. [L. nuttallii Wats.} 

 L. gracilis (Hook.) Wats.} 



25. Camelina Crantz 



l.Stem glabrous; leaves auriculate at base; petals yellow, 5-6 mm. long; pods 

 6-9 mm. long, 5-6 mm. broad; pedicels 12-25 mm. long; an occasional 



weed in fields and waste places, adv. from Eur. June-July 



C. sativa (L.) Crantz 



1. Stem hirsute below; leaves sagittate at base; petals pale yellow, 3-4 mm. 

 long; pods 4-6 mm. long, 4-5 mm. broad; pedicels 8-15 mm. long; fields 

 and roadsides, nat. from Eur. May-July C. microcarpa Andrz. 



26. Cardaria Desv. 

 C. draba (L.) Desv. Fields and waste places, nat. from Eur. Apr. -June. 

 \_Lepidinm draba L.} 



27. Lepidium L. — Peppercress 



1 . Stem-leaves sagittate at base, oblanceolate, pubescent, dentate to entire; 

 pods oval, papillose, 5-6 mm. long, in dense elongated racemes; pedicels 

 puberulent, divaricate, 4-8 mm. long; fields and waste places, nat. from 

 Eur. May-July. Field Peppercress L. campestre (L.) R. Br. 



1 . Stem-leaves merely sessile, not sagittate at base; stamens 2 or 4; pods sub- 

 orbicular, 2-3 mm. in diameter; waste places, very common. May-Nov. 

 Common Peppercress L. virginicum L. 



28. Thlaspi L. 

 T. arvense L. Field Pennycress. Fields and waste places, nat. from Eur. 

 May-Aug. 



29. Capsella Medic. 



(Bursa Weber) 

 C. burs a- past oris (L.) Medic. Shepherd's Purse. Fields and waste places, 

 very common; nat. from Eur. Mar.-Oct. 



72. Capparidaceae Lindl. — Caper Family 



1. Petals entire, or notched at the apex. 



2. Petals notched; pod sessile or nearly so on its pedicel; stamens more than 6 



1 . Polanisia 



2. Petals entire; pod long-stipitate on its pedicel; stamens 6 2. Clcome 



1. Petals laciniate, unequal; stamens 6-14; pod long-stipitate on its pedicel... .3. Crisiatella 



