148 CRUCIFERAE 



SS! Valves of the pods nerved. 

 Leaf -blades entire or merely toothed. 

 Pods oval, oblong or broadly linear. 23, Draba. 



Pods narrowly linear to linear-filiform. 26. Arabis. 



Leaf-blades finely dissected or pinnatifid. 

 Leaf-blades pinnately dissected. 27. Sophia. 



Leaf-blades pinnatifid. " 28. Diplotaxis. 



B. Pod^ stipitate. 29. Lunaria. 



1. CORONOPUS Gaertn. 

 Capsules finely wrinkled, crested. i. C. didymus. 



Capsules tuberculate-wrinkled, crestless. 2. C. Coronopus. 



1. Coronopus didymus (L.) J. E. Smith. LESSER WarT-cress. 

 (Man. p. 446; I. F. f. i6go.) In waste places, Newf. to Mo., Calif, and 

 Texas. — Pennsylvania : Philadelphia, ballast. 



2. Coronopus Coronopus (L.) Karst. WART or Swine's CrESS. 

 (Man. p. 446; I. F.y. i6gi.') In waste places .and on ballast, N. B. to Fla. 

 and the Gulf States. Fug. or adv. from Eu. — Pennsylvania : Philadel- 

 phia, ballast ; CHESTER. 



2. BURSA Weber. 



1. Bursa Bursa-pastoris (L.) Weber. Shepherd's PuRSE. (Man. p. 

 459; I. F. y. /7S2.) In fields and waste places. Nat. from Eu. — Penn- 

 sylvania : Northampton ; Bucks ; Philadelphia ; Del-'^ware ; 

 Chester ; Lancaster ; Franklin ; Huntingdon ; Allegheny. 



3. LEPIDIUM L. 



Blades of the stem-leaves auricled at the base and clasping. 

 Pods longer than broad, winged. 1. L. campeslre. 



Pods broader than long, wingless. i. L. Draba. 



Blades of the stem-leaves petioled or merely sessile, not clasping. 

 Pods wingless. 3. L. ruderaU. 



Pods more or less winged. 

 Pods winged at the top. 

 Cotyledons accumbent : corolla generally present. 4. L. Virginicum. 

 Cotyledons incumbent : corolla minute, obsolete or wanting. 



5. L. apetalum. 

 Pods winged all around. 6. L. sativum. 



1. Lepidium campestre (L.) R. Br. FIELD OR Cow Cress. (Man. 

 p. 445 ; I- F./. 1684.) In fields and waste places, N. B. and Ont. to Va., 

 and on the Pacific Coast. Nat. from Eu. — Pennsylvania: MoNROE; 

 Northampton ; Bucks ; Philadelphia ; Delaware ; Lancaster ; 

 Dauphin ; Allegheny. 



2. Lepidium Draba L. Hoary Cress. (Man. p. 445; I. V./. i68j.) 

 Near N. Y., and on ballast about the seaports. Also in Colo, and Calif. 

 Fugitive from Eu. — Pennsylvania : Philadelphia. 



3. Lepidium ruderale L. Roadside or Narrow-leaved PEppBR- 

 GRASS. (Man. p. 445 ; I. F. / 16S6.) In waste places, on ballast and 

 along roadsides about the cities, U. S. to Tex. Nat. from Eu.— Pennsyl- 

 vania : Northampton ; Philadelphia. 



