28 



FABACEAE 



2. Leaves palmate 



a. Flowers in heads or interrupted, bracted spikes 



(1) Plants silvery gray; leaflets 3-5; flowers purple, in interrupted 



spikes Psoralca 



(2) Plants not silvery gray; flowers pink, white or yellow, in heads Trifolium 



b. Flowers in elongated spikes 



(1) Leaflets 7-11; flowers generally blue Lupinus 



(2) Leaflets 3; flowers cresm color ■ Baptisia 



Robinia — Locust 



(Named for the brothers Robin) 

 Flowers while and fragrant, in drooping racemes R. pseudaedcia 



Caragana — Pea-tree 



(Tatar name of original species) 



1. Small tree; leaflets 8-18 C.arborescens 



2. Shrub ; leaflets 4, almost palmate C. digitdta 



Amorpha — False Indigo 



(Gr. a-, without, mcrphe. form, i.e., unlike the pea; 



1. Tall shrub, 1-3 m. ; leaflets 2-5 cm. long A. jruticosa 



2. Low shrub, 3 dm. or less A. nana 



\ icia — Vetch 



(L. vicia, a vetch) 



1. Racemes dense, 1-sided, 15-20- flowered V. crdeca 



2. Racemes loose, 1-20-flowered 



a. Leaflets ovate, about one-third as wide as long V. americdna 



b. Leaflets linear, about one-tenth as wide as long V. linearis 



Lathy rus — Sweet Pea 



(Gr. lathyros, a kind of pulse) 



1. Stipules broad and leaf-like 



a. Flowers yellowish white L. ochrolei'tcus 



b. Flowers pink-purple L. maritimus 



2. Stipules narrow, much smaller than the leaflets 



a. Leaflets broadly ovate, 15-20 mm. wide L.vendsus 



b. Leaflets lanceolate, 5-10 mm. wide L. palustris 



Aragalus — Loco Weed 



(Name doubtful) 

 Leaves all basal ; flowers purple A. lamberti 



Astragalus — Ground Plum, Buffalo Pea 



(Gr. astragalos, a kind of pulse) 



1. Flowers violet-purple 



a. Flowering in April and early May; calyx not black hairy A. crassicdrpus 



b. Flowering about June first; calyx markedly black hairy A. hypogldttis 



2. Flowers yellow; plant long hairy A. lotif loins 



Melilotus — Sweet Clover 



(Gr. meli, honey, lotos, a plant) 



Flowers yellow, in long slender racemes M. officinalis 



Psoralea — Psoralea 



(Gr. psoralecs, scurfy, from the glands or dots) 

 Plants densely silvery pubescent; flowers purple P.argophylla 



Trifolium — Clover 



(L. tri-, three, folium, leaf) 



1. Flowers yellow, heads 8-12 mm. in diameter T. procmnbens 



2. Flowers white to pink, heads more than 12 mm. in diameter 



a. Stems creeping; flowers white or pinkish T.rcpcns 



b. Stems erect or ascending 



(1) Heads sessile, involucrate ; flowers deep pink T. pratense 



(2) Heads stalked, not involucrate; flowers white or pinkish T. hybridum 



