GENUS 5. 



MUSTARD FAMILY. 



2. Lesquerella globosa (Desv.) S. Wats. 

 Short's Bladder-pod. Fig. 2014. 



Vesicaria globosa Desv. Journ. Bot. 3: 184. 1814. 

 Vesicaria Short ii T. & G. Fl. N. A. i : 102. 1838. 

 L. globosa S. Wats. Proc. Am. Acad. 23: 252. 1888. 



Slender, erect or ascending, sparingly branch- 

 ing, 6'-2o' high, finely stellate-pubescent all over. 

 Basal leaves obovate, i'-ii' long, obtuse; stem- 

 leaves narrower, linear or oblong, smaller, sessile, 

 entire or with slightly undulate margins, the 

 lowest sometimes narrowed into a petiole ; flow- 

 ers yellow; petals 2"-$" long; pedicels slender, 

 spreading, 4"-$" long in fruit; raceme elongat- 

 ing; pod nearly globular, i" in diameter, glabrous 

 when mature ; seeds i or 2 in each cell ; style 

 very slender, 2" long. 



In open places, Kentucky and Tennessee to eastern 

 Missouri. April. 



3. Lesquerella argentea (Pursh) MacM. 

 Silvery Bladder-pod. Fig. 2015. 



Myagrum argenteum Pursh, Fl. Am. Sept. 434. 



1814. 



Vesicaria argentea DC. Syst. 2: 297. 1821. 

 Lesquerella Ludoviciana S. Wats. Proc. Am. Acad. 



23:252. 1888. 

 L. argentea MacM. Met. Minn. 263. 1892. 



Biennial or perennial, tufted, nearly simple, 

 6'-i8' high, densely stellate-pubescent through- 

 out. Leaves linear, oblong or oblanceolate, 

 the lower 2'-$' long, blunt, entire or sparingly 

 repand-toothed ; flowers yellow ; petals 3" 

 long; pedicels slender, 8"-i2" long in fruit, 

 spreading or recurved; pod slightly stipitate, 

 stellate-pubescent, globose to oval, 2"-2\" 

 long; style about equalling the pod. 



Prairies, Minnesota, Nebraska and Kansas to 

 North Dakota, Wyoming and Arizona. May-June. 



4. Lesquerella gracilis (Hook.) S. Wats. 

 Slender Bladder-pod. Fig. 2016. 



Vesicaria gracilis Hook. Bot. Mag. pi. 3533. 1836. 

 L. gracilis S. Wats. Proc. Am. Acad. 23: 253. 1888. 



Annual, weak, green, stem slender, io'-2o' 

 high, freely branching, sparsely stellate-pubescent. 

 Leaves linear or oblanceolate, the lower slightly 

 petioled, the upper sessile, p"-2' long, their 

 margins often undulate; flowers yellow; petals 

 about 3" long; pedicels spreading, sometimes i' 

 long in fruit, ascending or upwardly curved; pod 

 globose, glabrous, 2" in diameter, stipitate at the 

 end of the pedicel; style 2" long; seeds several 

 in each cell. 



Prairies, Missouri and Nebraska to Texas. March- 

 May. 



