100 LEGUM1NOSJS. (PULSE FAMILY.) 



* Stems tall and erect ; the persistent stipules and (deciduous) bnicts large and con- 

 spicuous, ovate or ovate-lanceolate, taper-pointed : pods of 4 - 7 unequal-sided rhom- 

 bic joints, which are considerably longer than broad, about %' long. (Flower* 

 rat/ier large.) 



6. D. canescens, DC. Stem loosely branched (3 -5 high), hairy; 

 leaflets ovate, bluntish, about the length of the petioles, whitish and reticulated beneath, 

 both sides roughish with a close-pressed fine pubescence ; joints of the pod very 

 adhesive. Moist grounds, Vermont to Michigan, Illinois, and southward. 

 Aug. Branches clothed with minute and hooked, and long spreading rather 

 glutinous hairs. 



7. D. CUSpidatlim, Torr. & Gray. Very smooth throughout; stem 

 straight ; leaflets lanceolate-ovate and taper-pointed, green both sides ; longer than 

 the petiole (3' - 5') ; joints of the pod rhomboid-oblong, smoothish. Thickets. 

 July. The conspicuous bracts and stipules |' long. 



* # Stems (2 -5 high) erect: stipules as well as the bracts mostly deciduous, small 

 and inconspicuous : pods of 3-5 triangular or half-rhombic or very unequal-sided 

 rhomboidal joints, which are longer than broad, ' or less in length. (Flowers mid- 

 dle-sized. ) 



8. I>. laevigatum, DC. Smooth or nearly so throughout ; stem straight ; 

 leaflets ovate, bluntish, pale beneath (2' -3' long); panicles minutely rough- 

 pubescent. Pine woods, New Jersey and southward. 



9. D. vii'iilifloruin, Beck. Stem very downy, rough at the summit ; 

 leaflets broadly ovate, very obtuse, rough above, whitened with a soft velvety down 

 underneath (2' -3' long). S. New York and southward. Aug. 



10. !> Dilleilii, Darlingt. Stem pubescent ; leaflets oblong or olilong-oi'ate, 

 commonly bluntish, pale beneath, softly and flnely pubescent (mostly thin, 2' -3' 

 long). Open woodlands, common. Aug. 



11. D pauiculatliin, DC. Nearly smooth throughout; stem slender, 

 leaflets oblong-lanceolate, or narrowly lanceolate, tapering to a blunt point, thin (3' 5t 

 long) ; racemes much panicled. Copses, common. July. 



12. D. Strictum, DC. Smooth; stem very straight and slender, simple , 

 leaflets linear, blunt, strongly reticulated, thickish (l'-2'long, \' wide) ; panicle 

 wand-like; joints of the pod 1-3, semi-obovate or very gibbous (only 2" long). 

 Pine woods of New Jersey, and southward. Aug. 



* =fc * Stipules small and inconspicuous, mostly deciduous : pods of few roundish or 



obliquely oval or sometimes roundish-rhomboidal joints, l^' f to 2j" long. 

 - Stems erect : bracts before flowering conspicuous: racemes densely flowered. 



13. D. Canadense, DC. Stem hairy (3 -6 high); leaflets oblong- 

 lanceolate, or ovate-lanceolate, obtuse, with numerous straightish veins, much 

 longer than the petiole (l'-3' long) ; flowers showy, larger than in any other 

 species (' - J' long). Dry, rich woods, common, especially northward. Aug. 



14. D. sessilifdlilim, Ton-. & Gray. Stem pubescent (2 -4 high); 

 leaves nearly sessile ; leaflets linear or linear-oblong, blunt, thickish, reticulated, 

 rough above, downy beneath ; branches of the panicle long ; flowers small. 

 Copses, Penn. and Michigan to Illinois and southward. Aug. 



