3 6 



FABACEAE. 



VOL. II. 



stamens monadelphous, or the vexillar one distinct; pod ovoid, stalked or sessile, few-seeded, 

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



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



i. Anthyllis Vulneraria L. Kidney Vetch. Lady's- 

 fingers. Fig. 2490. 



Anthyllis Vulneraria L. Sp. PI. 719. 1753. 



Perennial, pubescent; stems often tufted, 8'-is' long. 

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

 solitary terminal broad one; peduncles as long as the 

 leaves 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- 

 last grounds at the Atlantic seaports. Adventive from Europe. 

 June-Aug. 



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



Herbs or shrubs, with dark glands or pellucid dots, i-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. [Greek, scurfy, from the glandular dots, whence the name scurfy-pea.] 



About 1 20 species, of wide geographic distribution. In addition to the following, about 25 

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



Leaves digitately 3-s-foliolate (leaflets all from the same point). 

 Plants leafy-stemmed. 



Flowers small, 2" 4" long. 



Pods subglobose. i. P. lanceolata. 



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. n. P.stipulata. 

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



Leaflets oblong-lanceolate, obtuse; pods 2" long, nearly orbicular. 12. P.pedunculata. 

 Leaflets ovate-lanceolate, acuminate ; pods 4" -5" long, obliquely ovate. 13. P. Onobrychis. 



P. temiiflora. 

 P. floribunda. 



P. linearifolia. 

 spiked. 

 P. collina. 



P. digitata. 

 P. argophylla. 

 P. cuspidal a. 



P. esculenta. 

 P. hypogaea. 



