PAPILIONACEAE. 559 



I. Zornia bracteata (Walt.) Gmel. ZORNIA. (I. F. f. 2169.) Perennial by 

 a long woody root, glabrous or sparingly Hnely pubescent; stems wiry, prostrate, 

 3-6 dm. long. Stipules about 6 mm. long; petioles 12-25 mm - l n g; leaflets 4, 

 oblong, lanceolate or oblong-obovate, acute at both ends, 12-25 mm l n g> or those 

 of the lower leaves obtuse and shorter; peduncles longer than the petioles; spikes 

 several-flowered, much interrupted in fruit, 5-10 cm. long; bracts ovate or broadly 

 oval, acute or acutish; pod 3-5-jointed, the joints oval, 3-5 cm. long, densely 

 spinulose. In dry sandy soil, Va. to Fla., Tex. and Mex. May- Aug. 



Arachis hypogaea L., the Pea-nut is occasionally seen as a waif, not permanently 

 established. 



34. MEIBOMIA Heist. [DESMODIUM Desv.] 



Perennial herbs, sometimes woody at the base, with stipellate 3-foliolate or in 

 some species I- or 5-foliolate leaves, and usually small flowers in racemes or pani- 

 cles. Calyx-tube short, its teeth more or less united into 2 lips, the upper one 

 2 -toothed, the 3 lower teeth acute or attenuate. Standard oblong, ovate or orbicu- 

 lar, narrowed or rarely clawed at the base; wings obliquely oblong; keel nearly 

 straight, obtuse. Stamens monadelphous or diadelphous (9 and i); anthers all 

 alike. Ovules 2-00 . Loment flat, several-jointed, the joints mainly coriaceous 

 and pubescent or muricate, indehiscent or rarely partially dehiscent, readily 

 separable. [Named for Dr. Brandus Meibom; died at Helmstadt, 1740.] About 

 160 species, natives of warm and temperate regions. Besides the following, about 

 20 others occur in the Southern and Southwestern States. 



* Loment not constricted above, deeply constricted below, long-stalked; leaflets broad. 

 Panicle arising from the base of the plant ; peduncle usually leafless, i. M. nudiflora. 

 Panicle terminal ; leaves crowded at its base. 2. M. grandiflora. 



leaves scattered along the stem. 3. M. pauciflora. 



* * Loment constricted on both margins, more deeply below than above. 



t Stems trailing or reclining. 

 Leaflets orbicular or nearly so. 



Leaflets 2.5 cm. long or less, glabrate, coriaceous. 4. M. arenicola. 



Leaflets 2.5-6 cm. long, thinnish, usually quite pubescent. 5. M, Michauxii. 



Leaflets ovate or oval. 



Corolla whitish ; leaves yellowish-green ; stipules broadly ovate. 



6. M. ochroleuca. 

 Corolla purple ; leaves dull green ; stipules subulate. 7. M. glabella. 



t f Stems erect or ascending. 



Leaves sessile or nearly so ; leaflets linear or lanceolate. 8. M. sessilifolia. 



Leaves petioled. 



Leaflets narrowly linear ; joints of the loment usually concave on the back. 



9. J/. stricta. 

 Leaflets broad (except in M. paniculata Chapmant). 



1. Joints of the loment notably longer than broad. 



Leaflets obtuse, rough-pubescent, yellowish green. 10. M. canescens. 

 Leaflets long-acuminate, scabrate above, slightly villous beneath. 



ii. M. longifolia. 

 Leaflets long-acuminate, glabrous, glaucous beneath. 12. M. bracteosa. 



2. Joints of the loment little longer than broad. 



(a) Loment distinctly long-stalked in the calyx. 



Plants glabrous or nearly so (except in M. paniculata pn bens'). 



Leaflets lanceolate or oblong. 13. M. paniculata. 



Leaflets broadly ovate or oval, glaucous beneath. 



14. M. laevigata. 

 Plants pubescent or scabrous. 



Leaflets thick, coriaceous, villous and reticulated beneath. 



15. M. rhombifolia. 

 velvety-pubescent beneath. 



16. M. viridiflora. 

 Leaflets scarcely coriaceous, appressed-pubescent or villous beneath. 



17. M. Dillenii. 



(b) Loment sessile in the calyx or nearly so. 



Loment-joints 4-7 ; flowers numerous, showy. 



Leaflets coriaceous, strongly reticulated beneath. 



18. M. Illinoensis, 



