170 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



28. CROTALARIA L. 



Crotalaria L. Sp. PI. 2: 714. 1753. 



ClaniUuin Desv. Ann, Sc. Xat. 9: 407. 182G. 

 yfarin-AiUnmaVxKi.. ^U\r. Ant. Nov. Gen. 3. 1844. 



Calyx lariniae free or moro rarely the two upper ones and the tlirco lower ones more 

 or less united; standard orlii^nilar, more rarely ovate, usually callous above the ^hort 

 claw; wing.s oblong or obovato, shorter than the standard; keel incurved or angled, 

 terminating inwards in a straight or incurved beak, rarely almost obtuse and not 

 beaked; stamens all united in a sheath open along the upper side; anthers alternately 

 long and erect and short and versatile; oA^ary sesv^ile or disLindly stalked, with 2 or 

 more ovules; style much incurved or sudd<mly bent inward, witli a longitudinal line 

 of hairs above the middle on the inn(T side; stigma terminal; pod round or oblong, 

 turgid or inflated, 2-valved, continuous witliin; seeds with a (iliform funiculus. 

 Herbs, shrubs, or undershrubs; leaves alternate, simple or digilately compound with 

 usually 3, rarely 1 or 5 or 7 leaflets; stipules frc^e from the petiole, occasionally decur- 

 rent along the stem, sometimes large and fcdiaceous, sometimes small, rarely wanting; 

 flowers yellow, more rarely blue or purple, in simple racenu's terminal, becoming 

 sometimes leaf-opposed, more rarely solitary; l)racteoles small, on th(^ peduncle or 

 adnate to the calyx tube, rarely wanting. 



KEY TO THE srECIES* 



1* C.sfipularia 



2. C\ sayitlalis 



Leaves simple (Section Simtlicifoliae Tientlu). 



Stipules foliaceous, broadly decurrent, with a semilunar, incurved 

 top; leaves oval or oblong, sessile or subsessile; peduncle lat- 

 eral, elongated, few-Aowered; calyx 5-parted, usually as long 

 as the corolla. 



Peduncles reaching 10 cm.; flowers many; leaves reaching 7 



cm,; pods stipitate. 

 Peduncles short, about 3-flowered; leaves 5 cm. long; pod 

 subsessile. 



Stipules wanting; leaves cuneate-oblong, shortly petioled, retuse 

 or very obtuse or faintly mucronate at the top; flowers in lax 

 terminal, elongated, many-flowered racemes; calyx bilabiate, 

 exceeded by the corolla. 

 Leaves digitately trifoliolate (Section Trifoliolatae Baker). 



Racemes both lateral and terminal, laxly fl to 12-floweredj 5 to 10 

 cm. long, on peduncles 2.5 to 10 cm. hnig; corolla l)right yel- 

 low; leaflets obovatc or orbii^ular^ 2.5 to 4 cm. long, the com- 

 mon petiole 4.5 to 5.5 cm. long; pod oblong, broad, turgid, 

 clothed with fine spreading hairs like those of stem. 4. C incana. 



Flowers 1 to 4 together in the axils of many of the leaves, if more 

 than one racemose or umbellate; corolla yellow, faintly veined; 



3. C. refiisa. 



leaflets elliptical-lanceolate, 1 to 2 cm. long, 7 to 9 mm. wide, 

 common petiole 2 to 3.5 cm. long; peduncles short, 5 mm. long; 

 pod glabrescent. 



L Crotalaria stipularia Desv. 



(Urban, 280.) 



5. C lolifolia. 



Annual, erect, 0.33 meter high or higher; leaflets oval or oblong, 2.5 to 7 cm. long, 

 1 to 2.25 cm. wide, sessile, subhirsute-pubescent on both sides; peduncle 5 cm. long; 



flowers yellow, small; calyx 5-parted, usually as long as the coroUaj fulvopilose; 



