CBVC1FEBAE. 161 



1. Baphanus Baphanistrum L. fJfild Radish. M. p. 450. Fields and 



aaaua hatbanistkum u. r.H'iMJ a 

 waste places. Summer. (^Axa 



. o 



2. Baphanus sativus L. Garden Radish. M. p. 450. Escaped from culti- 

 ' vation. Summer. 



11. BABBABBA B. Br. Winter Cress. 



Pods obtusely 4-angled, slender-pedicelled ; leaf -segments 1-.4 pairs. 



Pods divergent 6r ascending. ' 1. B. Barbarea. 



Pods erect, appressed. 2. B. striata. 



Pods sharply 4-angled, stout pedicelled; leaf -segments 4-8 pairs. 



3. B. praecox. 



.. 1. Barbarba Barbarba (L.) MacM. Yellow Socket. M. p. 451. Low 

 grounds and roadsides. Spring. 



2. Barbarba strjcta Andrz. M. p. 451. Fields and waste places. ' Spring. 



3. Barbarba praecox (J. E. Smith) E. Br. M. p. 451. Waste places. 



Spring. 

 Philadelphia— Upper Wissah'ichon (Je.), Germantown (Me.). Bucks— 

 Sellersville, Ddylestown, Penn Valley (Pr.)j Montgomery— ShannonviUe 

 (Cr.). Velaioare— Concord (W. Tr,). Northampton— Easton, Porter 

 ' (B.C.). 



Camden— Kaiglm's Point (Wn.). Salem— Woodstown (Wa.). Hun- 

 terdon — Bosemont (C). 

 New Castle— Greenbank, Commons. Now common. 



12. BOBIPA Scop. Cress. 



Flowers yellow. , , f 



Plants perennial by creeping or subterranean branches. 



1. B. sylvestris. 

 Plants annual or perennial, with fibrous roots. 



Fruiting pedicels 2-4 mm. long, stem diffuse. 2. R. obiusa. 

 Fruiting pedicels 4-8 mm. long; stem erect. 



Stem nearly or quite glabrous; pods linear or linear-oblong. ' 



3. B. palustris. 

 Stem hispid-pubescent; pods globose or oval. 



4. B. hispida. 

 Flowers white. 



Leaves pinnately divided; pods linear. 5. 22, Nasturtium. 



Leaves simple or the lower pinnatifid; pods oblong or globose. 



Terrestrial, tall ; leaves crenate, or the lower lobed or pinnatifid. 



6. B. Armoraeia. 



Aquatic; immersed leaves finely dissected. 7. B. Americana. 



1. Boripa sylvestris (L.) Bess. M. p. 452. Wet meadows. Summer. 



2. Boripa obtusa (Nutt.) Britton. M. p. 452. Ballast. Spring and sum- 



mer. 

 Camden— Camden (He.). 



3. Boripa palitstris (L.) Bess. Marsh Cress. M. p. 452. Wet places and 



in shallow water. Summer. 



4. Boripa hispida (Desv.) Britton. M. p. 453. Wet places. Summer. 



Philadelphia — (Pi). Bucks— Delaware Biverf(Fr.). Lancaster— (P.). 

 Northampton— Easton, Porter (B. C). Dauphin— (P.). , , : )l 



