492 AMERICAN JOURNAL OF BOTANY [Vol. 10, 



sists of three species of southwestern United States and northern and 

 central Mexico. In habit the species resemble some species of Astragalus 

 and its segregates, but the racemes are not axillary but terminal, or when 

 an axillary branch is developed become apparently opposite the leaves as 

 in Cracca. The spinescent stipules constitute also a distinctive character. 

 The genus is evidently related to Cracca, but the hair-tufts around the 

 stigma and the less distinct veining of the leaflets obscure the relationship. 

 Illustration: Plate XXXIII C. Peteria scoparia A. Gray, X 2/3; 

 1. calyx, X 2; 2. stamens, 3. pistil, 4. banner, 5. wing, 6. keel-petal, X 1; 

 7. pod of P. glandulosa, X 2/3; 8. cross section of the same, X 2; 9. seed, 

 X 2. 



SUBTRIBE 2. MlLLETTIANAE 



Trees or woody vines with alternate odd-pinnate leaves and persistent 

 stipules, usually also with stipels. The calyx is campanulate. 5- toothed, 

 but the lobes are often minute, or the upper 2 and the lower 3 more or less 

 united, forming an upper and a lower lip. The corolla has short-clawed 

 petals, the banner being broad, spreading or reflexed. The stamens are 

 monadelphous or diadelphous, the upper filament free at least at the base. 

 The pod is fiat, 2-valved, elongate, several-seeded. Seeds mostly reniform. 



Besides the following genus which is represented by native species in 

 the eastern United States and eastern Asia, the subtribe consists of four or 

 five Asiatic and perhaps two African genera. 



4. Kraunhia Raf. Med. Rep. N. Y. II, 5: 352. 1808 



High-climbing woody vines w T ith odd-pinnate leaves, small stipules and 

 stipels. The flowers are in terminal racemes, with deciduous bracts. The 

 calyx is more or less 2-lipped, the upper lip with 2 broad teeth united to near 

 the apex, the lower with 3 longer teeth. The corolla is blue or purple, rarely 

 white, the petals are subequal in length ; the banner has a suborbicular blade, 

 reflexed, and with 2 callosities or appendages, the claw is short; the blades of 

 the wings are obliquely obovate, falcate with a large basal auricle on the 

 upper edge and often a smaller one on the lower; the keel-petals are clawed, 

 united at the apex, the blade is lunate with a sharp basal auricle. The 

 stamens are diadelphous, the upper stamen is free or slightly adherent at 

 the middle. The ovary is stipitate, many-ovuled, glabrous; the style 

 inflexed, glabrous; the stigma small. The pod is elongate, flat, 2-valved. 

 The seeds are reniform, without strophiole. 



Illustration: Plate XXXIII D. Kraunhia frutescens (L.) Greene, 

 X 2/3; 1. calyx, 2. stamens, 3. pistil, 4. banner, 5. wings, 6. keel-petals, X 1 ; 

 7. fruit, 8. the same in cross section, X 2/3. 



The genus was established on Glycine frutescens L. without a diagnosis. 



Synonyms : 

 Diplonyx Raf. Fl. Ludov. 101. 1817. Type: D. elegans Raf., which is 



regarded as the same as Kraunhia frutescens (L.) Greene. 

 Thysanthus Ell. Jour. Acad. Phila. 1: 371. 1818. Type: T. frutescens 



(L.) Ell., based on Glycine frutescens L. 



