PAPILIONACEAE. 549 



teeth slightly snorter than the 3 lower; standard large, reflexed, clawed, with 2 

 small appendages at the base of the blade; wings oblong, falcate, auriculate at the 

 base; keel incurved, obtuse; stamens diadelphous; ovary stalked; ovules oo ; pod 

 elongated, torulose, 2-valved, coriaceous. [Named for Richard Bradley, 1675- 

 1732 Professor at Cambridge.] Five known species, the following of southeastern 

 N. Am., the others Asiatic. 



Racemes 4-10 cm. long; calyx-segments shorter than the tube. i. B.frutescens. 



Racemes 20-30 cm. long; calyx-segments as long as the tube, or the lower one longer. 



2. B. macrostachys. 



1. Bradleya frutescens (L.)Britton. AMERICAN WISTARIA. (I. F. f. 2120.) 

 A slender vine becoming 10 m. long Leaves 1-2 dm. long; leaflets 9-15, oblong 

 to ovate or lanceolate, 1.5-4 cm. long, acute or slightly acuminate at the apex, 

 acute or rounded at the base; racemes ovoid or oblong, 4-10 cm. long, with lanu- 

 ginous rachis and pedicels; calyx pubescent with appressed hairs, 5-6 mm. long; 

 corolla 15-18 mm. long. In low grounds, Va. to Fla. April-June. [Kraunhia 

 frutescens Greene.] 



2. Bradleya macrostachys (T. & G.) Small. LONG-CLUSTERED WISTARIA. 

 (I. F. f. 2i2Oa.) A stout vine with stems often becoming 2-3 cm. thick and 8 m. 

 long. Leaves 2-3 dm. long; leaflets usually 9, oval, oval-ovate to elliptic or 

 elliptic-lanceolate, 37 cm. long, acuminate at the apex, rounded or cordate at the 

 base; racemes 2-3 dm. long, narrowly conic, with densely hirsute and glandular 

 rachis and pedicels; calyx pubescent like the pedicels, 10-12 mm. long; corolla 

 1 8-2 1 mm. long. In and about swamps, Ind. to Kans. and La. Spring. 

 [Kraunhia macrostachys Small.] 



21. ROBINIA L. 



Trees or shrubs, with odd-pinnate leaves, and axillary or terminal racemes of 

 showy flowers. Stipules small, often spiny. Petioles slightly dilated at the base, 

 enclosing the buds of the next year. Calyx-teeth short, broad, the 2 upper some- 

 what united. Standard large, reflexed, not appendaged; wings oblong, curved; 

 keel curved, obtuse. Stamens diadelphous ; anthers uniform, or the alternate ones 

 smaller. Ovary stalked : ovules oo . Pod flat, linear, not septate between the 

 seeds, margined along the upper suture, 2-valved. [Named in honor of John and 

 Vespasian Robin, who first cultivated the Locust-tree in Europe, 1550-1629.] 

 About 6 species, natives of N. Am. and Mex. 



Twigs, petioles and pods glabrous: flowers white; a tree. i. R. Pseudacacia. 



Twigs and petioles glandular; pods hispid ; flowers pinkish ; a tree. 2. R. viscosa. 

 Twigs and petioles bristly ; pods hispiH ; flowers pink or purple ; a shrub. 



3. R. hispida. 



1. Robinia Pseudacacia L. LOCUST-TREE. FALSE OR BASTARD ACACIA. 

 SILVER-CHAIN. (I. F. f. 2121.) A large tree with very rough bark. Stipules 

 often spiny; leaflets 9-19, stalked, ovate or oval, mainly rounded at the base, ob- 

 tuse or emarginate and mucronulate at the apex, entire, 2.5-5 cm - l n g; stipels 

 small, setaceous; racemes loose, drooping; pedicels slender, 6-13 mm. long; 

 flowers fragrant, 15-20 mm. long, the standard yellowish at base; pod 5-10 cm. 

 loag, 4-7 seeded. Penn. to Ga., Iowa and the Ind. Terr. Extensively naturalized 

 in the Middle and Eastern States and eastern Canada. May-June. 



2. Robinia viscosa Vent. CLAMMY LOCUST. (L F. f. 2122.) A small tree 

 with rough bark. Stipules short, sometimes spiny; leaflets 11-25, stalked, obtuse 

 and mucronate, ovate or oval, nearly glabrous, 2.5-5 cm - l n g> thicker than those 

 of the preceding; stipels small, subulate; racemes rather dense; pedicels 4-9 cm. 

 long; flowers 18-25 mm. long, not fragrant; pod 5-10 cm. long, glandular- hispid. 

 s mthwestern Va. to Ga. Occasionally escaped from cultivation in the Middle and 

 Eastern States and in Canada. June. 



3. Robinia hispida L. ROSE ACACIA. BRISTLY OR Moss LOCUST. (I. F. f. 

 2123.) A much-branched shrub, 1-2.5 m - high. Stipules very small, or none; 

 leaflets 9-13, stalked, broadly ovate or oblong, entire, mainly obtuse or rounded at 

 each end, mucronate, 2.5-5 cm - l n g; stipels subulate or none; racemes loose; 

 pedicels 6-12 mm. long; flowers 17-30 mm. long, not fragrant; pods linear, bristly- 

 hispid Mountains of Va. and Tenn. to Ga. May -June. 



