POLYPETALOUS EXOGENOUS PLANTS. 223 



are pimctiite with pellucid clots. Flowers blue or white, in 

 slender racemes or spikes. 



A. FRUTicosA, L. Pubescent; leaves petioled; leaflets 

 15-21, oblong, obtuse or emarginate, sparingly dotted ; 

 flowers racemed, blue ; c«///:r- teeth very short, nearly equal, 

 pubescent; legume 1-2-seeded. — Shrubs, 6°-15° high; 

 leaflets I'-IJ' long; racemes mostly panicled. 



A. CANESCENS, Nutt. Hoary-tomentose ; leaves sessile ; 

 leaflets numerous, small, elliptical, crowded; spikes short, 

 panicled, dense-flowered ; calf/x-teeth acute, nearly equal ; 

 legume 1-seeded. — Shrub, l°-2° high; floivers bright blue. 

 — Drummond. 



A. PANICULATA, G. and T. Whole plant canescently 

 tomentose, except the upper surface, wiiich is shining and 

 nearly glabrous; floivers subsessile; teeth of the glandular 

 and tomentose calyx unequal, the 2 upper triangular-ovate 

 and shorter, the 3 lower triangular-subulate, the middle 

 one longest; leaves 8' to 1° in length; stipules short; 

 jmnicle often 1° or more long, compound; spikes 6' in 

 length, the flowers much crowded. — Drummond. 



ROBINIA. 



Calyx short, o-toothed or 5-cleft, the tw^o upper teeth 

 shorter and more or less united ; vexillum large, roundish ; 

 keel obtuse; stamens diadelphous (9 and 1) ; .<f^?//e bearded 

 on the side facing the vexillum; legume compressed, many- 

 seeded, the seed-bearing suture margined ; seeds flat. — 

 Trees or shrubs, often with stipular spines, unequally 

 pinnate leaves, and showy white or rose-colored flowers in 

 axillary racemes. 



E, PSEUDACACIA. {Locust J False Acacia.) Smoothish; 

 spines small on the older branches, straight; leaflets 9-17, 

 oblong-ovate, or elliptical ; racemes pendulous, oblong, 

 mauy-flowTred ; floivers white; legume 4-6-seeded ; ra- 



