420 



POLYGALACEAE 



N. Y. Known definitely only from Wading River, Suffolk Co., L. 



I.; S. I.; otherwise unknown. Doubtfully wild anywhere in 



the range. 

 N. J. Rare in Burlington, Mercer and Hunterdon counties in the 



drainage of the Delaware River; spontaneous elsewhere. 

 Pa. Northampton, Berks and Philadelphia counties. 



Tertiary, o: Cretaceous, rare or perhaps wanting; Older Forma- 

 tions, apparently scattered on various formations but probably 

 not wild. 168-220 days. About sea level. 



Rula graveolens L. has been collected from various parts of the range as an escaped 

 plant. 



SIMAROUBACEAE 

 1. Ailanthus Desf. 

 1. A. glandulosa Desf. In fields and along roadsides: Ont. to 

 Mass., N. Car., Ala. and Tex. Native of China. 



Common as an escape from cultivation throughout the range. 



POLYGALACEAE 

 1. Polygala [Tourn.] L. 



Flowers in solitary spikes or spike-like racemes, terminating the 

 stem and branches. 

 Basal leaves spatulate or obovate; flowers orange-yellow. I. P. lutea. 



Basal leaves inconspicuous or wanting; flowers not yellow. 



Leaves, at least the lower, verticillate; spikes 8-18 mm. 

 thick, blunt; flowers purple to greenish white. 

 Spikes sessile, or nearly so; wings deltoid. 2. P. cruciata. 



Spikes peduncled; wings lanceolate-ovate. 3. P. brcvifolia. 



Leaves verticillate and alternate; spikes 4-6 mm. thick, 

 acute. 

 Verticillate leaves predominating; spikes dense; 



flowers green to purplish. 4. P. verticillata. 



Alternate leaves predominating; spikes loose; flowers 



more purple. 5. P. ambigua. 



Leaves all alternate. 



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



Petals not conspicuously united into a tube. 

 Spikes ovoid to globose. 



Bracts persistent; flowers rose purple to white. 7. P. viridescens. 

 Bracts deciduous; flowers rose purple. 8. P. mariana. 



Spikes cylindric. 



Leaves 4-12 mm. long; flowers greenish to 



purplish. 9. P. Nuliallii. 



Leaves 2.5-5 cm - ' on g! flowers white or 



greenish. 10. P. Senega. 



