196 POLYGAIvACEAE 



Family 5. SIMARUBACEAE DC. Aii,anthus Famii,y. 



1. AILANTHTJS Desf. 



X. Ailanthus glanduloBa Desf. Treb of Heaven. Aii<anthds. 



(Man. p. 582 ; I. P./- 22^3.) Escaped, along roadsides and in fields in 



southern Ont., and in the eastern U. S. — Pennsylvania ; Northampton ; 



PhiladeivPhia ; Dei,awas.e ; Chester ; Lancaster ; Frankwn ; 



Al,I<EGHENY. 



Family 6. POLYGALACEAE Reichenb. Milkwort Family. 



1. POLYGALA L. 



Flowers several or many in terminal often spike-like racemes. 

 Racemes spike-like. 

 Corolla orange-yellow : basal leaves persistent with spatulate or obovate 



blades. 1. P. lutea. 



Corolla not yellow : basal leaves early deciduous. 

 Leaves, at least those at the lower nodes, whorled. 

 Racemes 8-18 mm. thick. 2. P. cruciata. 



Racemes 4-6 mm. thick. 

 Leaves prevailingly whorled : wings as long as the capsule. 



3. P. verticillata. 

 Leaves prevailingly alternate : wings shorter than the capsule. 



4. P. ambigua. 

 Leaves all alternate. 



Petals united into a cleft tube 6-8 mm. long. 5. P. incarnata. 

 Petals not united into a long tube. 

 Racemes abbreviated. 



Racemes over 11 mm. thick. 6. P. viridescens. 



Racemes less than 1 1 mm. thick. T- P- Nuttallii. 



Racemes elongated. 8. P. Senega. 



Racemes lax, not spike-like. g. P. polygama. 



Flowers 1-4, axillary to leaf-like bracts. 10. P. paucifolia. 



1. Polygala lutea L. Orange Milkwort. (Man. p. 583 ; L F. /. 

 2275.) In pine-barren swamps, L. I., N. Y., south to Fla. and La. — 

 Pennsylvania : Bucks, Bristol. 



2. Polygala cruciata L. Marsh Milkwort. (Man. p. 583 ; I. F./. 

 22/6.) In sandy swamps, Me. to Fla., west to Minn, and La. — Pennsyl- 

 vania : Bucks, Bristol ; Montgomery ; Delaware ; Chester ; Lan- 

 caster. 



3. Polygala vertioiUata L. Whorleb Milkwort. (Man. p. 583 ; 

 I. F.y. 22^8.) In dry or moist soil, mostly iu fields, southern Quebec to 

 Minn., south to Fla. and Mex. — Pennsylvania: Northampton; Le- 

 high ; Luzerne ; Bucks ; Delaware ; Lancaster ; Chester ; 

 Perry ; Franklin ; Huntingdon ; Allegheny. 



4. Polygala ambigua Nutt. Loose-spiked Milkwort^ (Man. p. 

 584 ; I. F. /. 227g.) In dry soil, N. J. and Pa. to Ga., Tenn. and La.— 

 Pennsylvania: Delaware ; Chester ; Lancaster ; York ; Columbia ; 

 Allegheny. 



