DICOTYLEDONOUS PLANTS. 



10. AMORPHA. Linn. 



Calyx 5-toothed, obconic-campanulate. Standard of the 

 corol ovate, concave ; wings and keel none. Style filiform, 

 straight, glabrous. Stamens exserted, monadelphous at base. 

 Legume compressed, ovate or lunulate, 1 -celled, 1 2-seeded. 



Diadeljphia. Decandria. 



A. fruticosa Linn. : subarborescent, smooth ; leaves pinnate, petio- 

 late ; leafets elliptic-oblong ; spikes aggregated, long ; calyx hoary, 4 

 teeth, obtuse, the other one acuminate ; legume few-seeded. 



HAB. N. J. to Car. W. to Rocky mountains. July. *> A 

 shrub, with spikes of purple flowers. Varies with emarginate, 

 mucronate and narrower leaves. Wild Indigo. 



11.- ROBINIA. Dt Can*!. 



Teeth of the calyx 5, lanceolate, two upper ones approxi- 

 mate. Corol papilionaceous. Standard large. Keel ob- 

 tuse. Stamens diadelphous, deciduous. Legume compress- 

 ed, subsessile, many-seeded ; valves flat, thin. 



., Diaddphia. Decandria. 



R. pscudacacia Linn. : leaves pinnate, with an odd leafet ; stipules 

 prickly ; racemes pendulous, and with the legume smooth ; teeth of 

 the calyx unarmed. 



HAB. Near cultivated grounds, but apparently native. N Y. to 

 Car. W. to Mis. May. A large tree, the wood of which is 

 much esteemed in ship building. Flowers white, odorous, in 

 long racemes. J^on^t Tret. 



12. ASTRAGALUS. Linn. 



Calyx 5-toothed. Corol with the keel obtuse. Stamens 

 diadelphous. Legume 2, or half 2-celled ; lower suture in- 

 flexed. Diadelplna. Decandria. 



1. A. canadcnsis Linn.: erectish, subpubescent ; leafets JO 12 

 pairs with an odd one, elliptic-oblong, rather obtuse, smooth on both 

 sides ; stipules lanceolate, acuminate ; peduncles about as long as the 

 leaves ; flowers spiked ; bracts shorter than the calyx ; legume erect, 

 ovate, terete, smooth. 



HAB. Banks of streams. Can. to Car. W. to Miss. June. If. 

 Stem 2 feet high. Flowers pale yellow. Milk Vetch. 



2. A. carolinianus Linn.: erect, smooth; leafets 20 pairs, with an odd 

 one, oblong, pubescent beneath ; stipules ovate, acuminate ; pedun- 

 cles longer than the leaves ; flowers spiked ; bracts as long as the pe- 

 dicels ; legume erect, ovate, tumid, rostrate. 



HAB. Mountains. Penn. to Car. June, July. * 1l-^pkca 

 dense. Flowers yellow. Perhaps only a variety of the former. 



