294 



PAPILIONACEAE. 



[VOL. II. 



i. Kraunhia frutescens (L.) Greene. 

 American Wisteria. (Fig. 2120.) 



Glycine frutescens L. Sp. PI. 753. 1753. 

 Wisteria speciosa Nutt. Gen. a: 116. 1818. 

 Wisteria frutescens Poir. in Lam. 111. 3: 674. 1823. 

 Krauhnia frutescens Greene, Pittonia, 2: 175. 1891. 



Climbing over trees and bushes to a length of 

 3O-4o or more, forming a stein several inches 

 in diameter. Leaves petioled; rachis and short 

 stalks of the leaflets often pubescent; leaflets 9- 

 15, ovate or ovate-lanceolate, somewhat acumi- 

 nate but blunt at the apex, rounded at the base, 

 entire, i / -2 / long, glabrous and dark-green above, 

 pale and sometimes slightly pubescent beneath; 

 racemes dense, 2 / -7 / long; pedicels a // -3 // long; 

 calyx finely pubescent; corolla lilac -purple, 6"- 

 9" long; auricles of the wings one short and 

 one slender; pod linear, 2'-$' long. 



In low grounds, Virginia to Florida, west to In- 

 diana, Kansas, and Louisiana. Called also Kidney- 

 bean Tree. April-June. 



21. ROBINIA L. Sp. PI. 722. 1753. 



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

 ers. Stipules small, often spiny. Petioles slightly dilated at the base, enclosing the buds of 

 the next year. Calyx-teeth short, broad, the 2 upper somewhat 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. [Name in honor 

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



About 6 species, natives of North America and Mexico. 



1. R. Pseudacacia. 



2. R. viscosa. 



3. R. hispida. 



Twigs, petioles and pods glabrous; flowers white; a tree. 



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



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



i. Robinia Pseudacacia L,. Locust- 

 tree. False or Bastard Acacia. 

 Silver-chain. (Fig. 2121.) 



Robinia Pseudacacia L. Sp. PI. 722. 1753. 

 Pseudacacia odorata Moench, Meth. 145. 1789. 



A large tree with very rough bark, maximum 

 height of about 80 and trunk diameter of 3>, 

 rarely shrubby. Twigs and foliage glabrous or 

 very nearly so; stipules often spiny; leaflets 9-19, 

 stalked, ovate or oval, mainly rounded at the 

 base, obtuse or emarginate and mucronulate at 

 the apex, entire, i / -2 / long; stipels small, seta- 

 ceous; racemes loose, drooping; pedicels slender, 

 3 // -6 // long; flowers white, fragrant, 7"-io // long, 

 the standard yellowish at base; pod glabrous, 

 2 / -4 / long, about 6" wide, 4~7-seeded. 



Monroe Co., Pa., south, especially along the west- 

 ern slopes of the mountains, to Georgia, west to Iowa 

 and the Indian Territory. Extensively naturalized 

 in the Middle and Eastern States and eastern Canada. 

 Wood strong, very durable, greenish brown, the sap- 

 wood yellow; weight per cubic foot 46 Ibs. Exten- 

 sively used for posts, in ship-building, and especially 

 for tree-nails. Called also Yellow or Black Locust. 

 May-June. 



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