394 



FABACEAE. 



Vol. II, 



2. Stylosanthes riparia Kearney. 



tknver. I'itr. 2^ 



Decumljent Pcncil- 

 4- 



Slylosaiilhcs riparia Kearney, Bull, Torr. Club 24: 565. 1897. 



Stems decumbent, or ascending, 3'-i2' long, usually with a 

 tomentose line on the elongated internodes. Stipules sheath- 

 ing, subulate above; petioles pubescent; leaflets elliptic to 

 obovate-cuneate, the terminal one s"-9" long, the lateral ones 

 somewhat smaller ; spikes terminal, about 6-flowered, with 

 only I or 2 perfect flowers; calyx-tube conspicuously veined, 

 about 2" long; vexillum proportionately longer than in S. 

 biflora; floral bracts usually deeply cleft to the middle, or 

 beyond, 2-nerved ; upper (perfect) segment of the pod nearly 

 twice as broad as in 5. biflora. 



In dry woods, Pennsylvania and Delaware to West Virginia. 

 Alabama and Tennessee. May-Aug. 



37. ZORNIA Gmcl. Syst. 2: 1096. 1791. 



Herbs, with digitately 4-foliolate or 2-folioIate petioled leaves, the leaflets not stipellate, 

 the stipules small or foliaceous, sagittate. Flowers yellow in our species, small, interruptedly 

 spicate, large-bracted, sessile, rarely solitary, the spikes axillary and terminal, peduncjed. Bracts 

 2 together, nearly enclosing the flower. Calyx 2-lipped, 5-lobed, its tube short. Standard 

 nearly orbicular, clawed ; wings oblique ; keel incurved. Stamens monadelphous ; anthers 

 alternately longer and shorter. Ovary sessile ; ovules several ; style very slender. Loment 

 flat, several-jointed. [In honor of Johann Zorn, a German apothecary.] 



About 12 species, all natives of America, 2 of them naturalized in the warmer regions of the 

 Old World, the following typical. Besides the following, another occurs in the southwestern states. 



I. Zornia bracteata ( Walt. ) Gmel. Zornia. 



Aiwiiymos bracteata Walt. FI. Car. 181. 1788. 



Zornia bracteata Gmel. Syst. 2: 1096. 1791. 



Zornia tetrafhylla Michx. Fl. Bor. Am. 2: 76. 1803. 



Perennial by a long woody root, glabrous or spar- 

 ingly finely pubescent; stems wiry, prostrate. i-2 

 long. Stipules about 3" long; petioles i'-i' long, slen- 

 der; leaflets 4, oblong, lanceolate, or oblong-obovate, 

 acute at both ends, J'-i' long, or those of the lovi-er 

 leaves obtuse at the apex and shorter; peduncles longer 

 than the petioles ; spikes several-flowered, much inter- 

 rupted in fruit, 2'-4' long; bracts ovate or broadly oval, 

 3"-5" long, acute or acutish ; pod 3-s-jointed, the joints 

 oval, \'-2" long, densely spinulose. 



In dry sandy soil, southeastern Virginia to Florida. 

 Texas and Mexico. May-Aug. 



Arachis hypogaea L.. the pea-nut. is occasionally seen 

 as a waif, not permanently established. 



38. MEIBOMIA Heist. Fabr. Einim. Pi. Hort. Helmst. i68. 1759. 

 [Desiiodium Desv. Journ. Bot. (II.) i : 122. f>l. 5, /'. /j. 1S13.] 

 Perennial herbs, sometimes woody at the base, erect, ascending or trailing, with stipellate 

 3-folioIate or in some species i- or S-folioIate leaves, and usually small flowers in terminal 

 or axillary compound or simple racemes or panicles. Calyx-tube short, its teeth more or less 

 luiited into 2 lips, the upper one variously 2-toothed. the 3 lower teeth acute or attenuate. 

 Standard oblong, ovate or orbicular, narrowed or rarely clawed at the base; wings obliquely 

 oblong; keel nearly straight, obtuse. Stamens monadelphous or diadelphous (9 and i) ; 

 anthers all alike. Ovary sessile or stalked; ovules 2-00. Loment flat, sessile or stalked, 

 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-] 



