36o 



FABACEAE. 



Vol. U. 



stamens monadelphous, or the vexillar one distinct; pod ovoid, stalked or sessile, fcvv-secded. 

 indehiscent, enclosed by the calyx. [Ancient name for some qnile different plant.] 



Twenty species or more, natives of Europe, Asia and northern Africa, the following typical. 



I. Anthyllis Vulneraria L. Kidney \'etch. Lady's- 

 fingcrs. Fig. 2490. 



.liilliyllis Vulneraria L. Sp.' PI. 719. 1753. 



Perennial, pnbescent ; stems often tufted, 8'-i5' long. 



^eaflets 3-17, oblong, or those of basal leaves reduced to a 

 solitary terminal broad one : peduncles as long as the 



eaves or longer ; heads subtended by a deeply lobed bract ; 

 calyx very hairy, much inflated, narrowed at the mouth ; 

 corolla yellow to dark red, 6"-io" long. 



In fields, Pennsylvania and Ontario, and in waste and bal- 

 ast grounds at the Atlantic seaports. Adventive from Europe. 

 June-Aug. 



16. PSORALEA [B. Juss.] L. Sp. PI. 762. 1753. 



Herbs or shrubs, with dark glands or pellucid dots, 1-5-foliolate leaves, and purple blue 

 pink or white flowers, mainly in spikes or racemes. Stipules broad. Calyx-lobes equal or 

 the lower longest, or the two upper ones sometimes united. Standard ovate or orbicular, 

 clawed; wings oblong or falcate; keel incurved, obtuse. Stamens monadelphous or diadel- 

 phous; anthers uniform. Ovary sessile or short-stalked, i-ovuled. Pod ovoid, short, inde- 

 hiscent, i-seeded. fGreek, scurfy, from the glandular dots, whence the name scurfy-pea.] 



About I JO species, of wide geographic distribution. In addition to the following, about .'5 

 others occur in the western United States. Type species : Psoralca bituminosa L. 



Leaves digitately 3-s-foIiolate deaflets all from the same point). 

 Plants leafy-stemmed. 



Flowers small. 2"-:^" long. 



Pods subglobose. i. 



Pods ovoid, or ovate. 



Pods with a short, mostly abrupt beak. 



Flowers few. scattered in slender elongated racemes. 2. 



Flowers numerous, clustered, or crowded in racemes. 3. 



Pods with a slender sharp or elongated beak. 



Leaflets linear : flowers in loose elongated racemes. 4, 



Leaflets linear-lanceolate, oblong, oblanceolate or obovate : flowers 

 Leaflets oblanceolate or obovate : pubescence gray. 5. 



Leaflets linear-lanceolate or oblong ; pubescence silvery. 



Leaflets linear-lanceolate : calyx inflated in fruit. 6. 



Leaflets oblong : calyx not inflated in fruit. 7. 



Flowers large. 6"-8" long, densely spicate. 8. 



Plants acaulescent. or nearly so, low, spreading; roots tuberous. 



Leaflets oblong-cuneate. 9. 



Leaflets linear-oblong. 10, 



Leaves pinnately 3-foliolate (the terminal leaflet stalked). 

 Racemes short, on peduncles about equalling the leaves. 

 Racemes spicate. the peduncles elongated, much exceeding the leaves. 

 Leaflets oblong-lanceolate, obtuse ; pods 2" long, nearly orbicular. 

 Leaflets ovate-lanceolate, acuminate ; pods 4"-5" long, obliquely ovate. 



P. lanceolata. 



P. teniiiflora. 

 P. floribunda. 



P. linearifolia. 

 spiked. 

 P. collina. 



P. digitata. 

 P. aygophylla. 

 P. cnspidata. 



P. esculenta. 

 P. hypogaea. 



1 1. P. stipulata. 



13. 



P. pcdnncitlata. 

 P. Onobrychis. 



