FABACi^AE. 165 



Common, naturalized in waste places and on roadsides. Native in woods along 

 the Susquehanna Eiver. — False-acacia. Locust-tree. 



12. STYLOSANTHES Sw. Perennial herbs. Leaflets 3, veiny. Flowers 

 of two kinds, the one complete, but sterile, the other without perianth, but 

 fertile. Calyx 2-lipped: upper lip with 2 broad lobes: lower lip wdth the 

 middle lobe longer and narrower than the lateral ones. Corolla yellow or 

 orange, persistent: standard with a very broad blade: blades of the wings and 

 the keel-petals auricled, the latter incurved. Loment flat, 1- or 2-jointed, the 

 lower joint empty, the upper one opening at the apex. — Sum. — Pencil- 

 flower. 



Blade of the standard longer than wide, the spurs curved : terminal joint of the 

 pod with a lateral beak. 1. g, hiflora. 



Blade of the standard wider than long, the spurs straight : terminal 



joint of the pod with the beak nearly axial. 2. S. riparia. 



1. S. biflora (L.) B.S.P. Plants upright, the stem finely pubescent: leaflets 

 9-35 mm. long; blades elliptic, linear-elliptic, lanceolate, or oblanceolate: 

 standard 6-7 mm. long: terminal joint of the pod very inequilateral, about 5 

 mm. long. — N. S. Common, on dry banks. — Sandstones and shales, schists. 



2. S. riparia Kearney. Plants decumbent: leaflets 10-18 mm. long; blades 

 elliptic, oblanceolate, or cuneate-obovate, thinner than those of S. hiflora: 

 standard 8-9 mm. long: terminal joint of the pod slightly inequilateral, 3-4 

 mm. long. — S. Bather rare, on roadsides and banks. — Schists. 



13. MEIBOMIA Heister. Herbs, shrubs, or vines. Leaflets 3, or rarely 

 1 or 5. Eacemes simple or compound. Calyx 2-lipped, sometimes obscurely so, 

 the middle lobe of the lower lip often smaller or narrower and longer than 

 the lateral ones. Corolla variously colored or white: standard with a broad 

 blade: blades of the wings and the keel-petals auricled on one side, short- 

 clawed. Ovary slender. Loment few-several-jointed, usually with hooked 

 hairs. — Sum. — Tick-trefoil. Beggar 's-ticks. 



Calyx shallowly lobed : loments straight along the dorsal suture, deeply constricted 

 along the ventral suture, long-stipitate. 

 Terminal leaflet-blades relatively scarcely wider than the lateral ones : peduncle 



arising from the rootstock. 1. M. nudiflora. 



Terminal leaflet-blades conspicuously wider than lateral 



ones, or wider than long : peduncle terminating the stem. 2. M. grandiflora. 

 Calyx deeply lobed : loments constricted on both sutures, 

 but more deeply so in the ventral than the dorsal side, 

 short-stipitate or nearly sessile. 

 Stem and branches weak, trailing : stipules broad. .3. M. Michaxixil. 



Stem and branches rigid, erect or ascending : stipules 

 narrow. 

 Leaves with very short or no petioles. 4. M. sessiUfoUa. 



Leaves with relatively long petioles. 



Joints of the loments manifestly longer than broad. 

 Bracts small and inconspicuous : panicle-bran- 

 ches long-hairy : leaflets with obtuse or ob- 



tusish yellowish-green rough-pubescent blades. 5. M. cancsccns. 

 Bracts large and conspicuous : panicle-branches 

 short-hairy : leaflets with acuminate glabrous 



blades, glaucous beneath. 6. M. hractcosa. 



Joints of the loments only slightly longer than 

 broad. 

 Loments manifestly stipitate. 



Calyx eciliate : plants glabrous or nearly so. 7. M. paniculata. 



Calyx ciliate : plants pubescent or scabrous- 

 pubescent. 

 Standard 5-6 mm. long : leaflet-blades 

 leathery, velvety beneath : loment- 

 joints rounded. 8. M. viridiflora. 



