Nov., 1923] RYDBERG NORTH AMERICAN FABACEAE 493 



Wisteria Nutt. Gen. 2: 115. 1818. Type: W. speciosa Nutt., based on 

 Glycine frutescens L. Sprengel (Syst. 3 : 255. , 1826) corrected the spelling 

 of the name to Wistaria, as the genus had been dedicated to Dr. Wistar. 

 The genus consists of 5 or 6 species, of which two are native of eastern 



and southern United States. It is evidently very closely related to the 



large Asiatic genus Millettia, the species of which are mostly trees or shrubs; 



only a few of them are climbing. 



SUBTRIBE 3. BRONGNIARTIANAE 



Trees or shrubs, with alternate odd-pinnate leaves, stipules, and some- 

 times stipels. The flowers are axillary or in terminal racemes or panicles. 

 The calyx is more or less 2-lipped, the tube short, the upper 2 lobes united 

 high up, the lower 3 lobes also somewhat united. The corolla has a broad 

 banner. The stamens are monadelphous or diadelphous. The pod is 

 usually elongate, flat, 2-valved, several-seeded. The seeds are erect, i.e., 

 the longer axis of the seed is at right angles to the axis of the pod, with a 

 well developed strophiole. 



The subtribe consists of the following two genera and two from Australia. 

 It is distinguished by the well developed strophiole. Its relationship is 

 probably with the Robinianae. 



Calyx 5-lobed, the upper 2 lobes united two thirds their length, the 



lower 3 usually free to near the base; stamens diadelphous. 5. Brongniartia. 



Calyx 2-lipped, the upper 2 and the lower 3 lobes united to the apex; 



stamens monadelphous. 6. Harpalyce. 



5. Brongniartia H.B.K. Nov. Gen. & Sp. 6: 465. 1823 



Shrubs or trees, with odd-pinnate leaves. Stipules are present, but 

 often caducous, the leaflets entire-margined, sometimes with minute stipels. 

 The flowers are normally axillary in small 1- -7-flowered clusters. In some 

 species, however, the upper floral leaves are reduced to the two stipules, 

 which resemble a pair of bracts, and the inflorescence becomes falseiy 

 racemose. The individual flowers are subtended by a pair of bractlets, 

 sometimes foliaceous. sometimes reduced to a pair of hair-tufts. The upper 

 two calyx-lobes are united high up, the lower only slightly at the base. 

 The corolla is red, brown, or purple; the banner is broad, its blade orbicular 

 or broadly obovate, short-clawed; the wings are obliquely oblanceolate or 

 obovate, more or less falcate, with a short fleshy claw and a rounded auricle; 

 the blades of the keel-petals are broadly lunate, with a fleshy claw, united 

 from the middle to the tip. The stamens are diadelphous, the alternate 

 ones shorter; the ovary is short-stipitate, the style incurved, glabrous, 

 the stigma minute. The pod is short-stipitate, flat, elongate, 2-valved, 

 usually several-seeded, slightly wing-margined on the upper suture, the 

 valves leathery. 



Illustration: Plate XXXIV E. Brongniartia Benthamiana Hemsl., 

 X 2/3; 1. calyx, 2. staminal sheath, 3. pistil, 4. banner, 5. wing, 6. keel- 

 petals, X 1; 7. pod, X 2/3; 8. seed of B. sericea Schlecht., X 1. 



The genus was established on two species, B. mollis and B. podalyrioides , 

 of which the first may be regarded as the type. 



