118 PAPILIONACEAE 



12. M. Marylandica ( L. ) Knntze. l°-3° high, nearly glabrous : leaf- 

 lets ovate-orbicular, ^''-Xi" long, glabrous : loment 1-3-jointed, the 

 joints obliquely oval. — Locally common in dry vpoods south of Grain 

 Valley and near- Little Blue Tank and Martin City. August-September. 



15. LBSPEDBZA Micbx. BuSH Clovee. 

 Herbs with non-stipellate, 3-toliolate leaves, and flowers in panicles, 

 spikes or clusters. Calyx lobes equal. Stamens diadelphous. Pods 

 composed of a single one-seeded joint, ovate to orbicular. Some of the 

 flowers sessile and apetalous in Nos. 1, 2, 3 and 4. Probably contains 

 three distinct genera. 



Perennials ; flowers purple. 

 Flowers long-peduncled. 

 Leaflets oval- oblong to linear-oblong. 



Pods about length of sepals. 1 L. Manniana. 



Pods twice the length of sepals. 2. L. acutiearpa. 



Leaflets oval or wider. 3. L. violacea. 



Flowers nearly sessile. 4. L. Virginica. 



Perennials ; flowers yellowish- white. 5. L. capitata. 



Annuals. 6. L. striata. 



1. L. Manniana Mackenzie & Bush, n. sp. Erect-ascending, l°-2° 

 high, appressed-pubesoent : leaves short-petloled : leaflets oblong-elliptic 

 to linear-oblong, 4'''-18" long, V'-W wide, appressed-pubesoent beneath, 

 mucronate : peduncles numerous, 4-12-flowered : sepals very long, lan- 

 ceolate-acuminate, 2i''''-3" long, strongly hairy, often exceeding the 

 corolla and pod : pod 2^" long. — In barrens at Swope Park and near Red 

 Bridge. Local. August-September. 



2. L. acutiearpa Mackenzie & Bush, n. sp. Kesembles No. 1 : 

 peduncles fewer-flowered : sepals subulate, \\" long, appressed-hairy, 

 half the length of the pods, the latter very acute, Z" long.— Barrens at 

 Swope Park and Jones' Creek. 



3. L. violacea (L. ) Pers. Bushy-branched, spreading, S'-SO' high 

 nearly glabrous : leaflets oval. 4''''-12''' long, i"-W wide, subglabrate 

 below : flower-spikes paniculate : flowers V-h" long, on pedicels 1" 

 long.^In rooky woods at Swope Park, "Westport, etc. 



Var. prairea Mackenzie & Bush,, n. var. Leaflets 6" or less long : 

 flower-spikes hardly paniculate ; flowers 3" long, on pedicels \" long. — 

 The common form on dry banks throughout. Possibly a distinct species. 



4. L. Virginica (^L.) Britton. 1^°-2J° high, erect, appressed-pubes- 

 oent : leaflets oblong-linear, 4'''-12" long, appressed-pubesoent beneath : 

 flowers crowded in subsessile clusters : pods appressed-pubesoent. — Occa- 

 sional in dry woods, especially in the southern part. August-September. 



5. L. capltata Miohx. 2°-6° high, pubescent : leaflets oblong, V-^' 

 long, silvery-pubescent, glabrate above : flowers in dense globose heads : 

 pods pubescent. — Common in dry ground. July-September. 



Var. sericea Hook. & Am. Leaflets sericeous above. — In similar situ- 

 ations as the type, and about as common. 



