Nov., 1923] 
RYDBERG-NORTH AMERICAN FABACEAE 
495 
falcate, and united above the middle. The stamens are diadelphous, the 
sheath is straight; the ovary is sessile, the style nearly straight to near the 
apex, hairy along the upper side above; stigma minute. The pod is flat, 
straight, 2-valved, transversely septate within. 
The subtribe consists of a single genus and a single species. 
/y-z-C, 
7. Barbieria DC. Mem. Leg. 241. 1825 
The generic characters are included in the subtribal description. 
Illustration: Plate XXXIV G. Barbieria pinnata (Pers.) Baill., 
X 2/3; 1. calyx, 2. stamens, 3. pistil, 4. banner, 5. wing, 6. keel-petal, 7. pod, 
X 1; 8. cross section of the same; 9. seed, X 2. 
The genus was based on Clitoria polyphylla Poir. or Galactia pinnata 
Pers. Its distribution extends from Porto Rico to Cuba, southern Mexico, 
Bolivia, and Brazil. 
Subtribe 5. Sesbanianae 
Trees, shrubs, or herbs with abruptly pinnate leaves and caducous 
stipules but no stipels. The flowers are borne in axillary racemes. The 
calyx is round-campanulate, fully as broad as high, with very short teeth. 
The banner has a broad reflexed blade and a short claw; the keel-petals are 
strongly arcuate, united at the middle, but the claws and tips are free. 
The stamens are diadelphous; the staminal sheath is dilated below and the 
upper filament knee-bent near the base. The pod is 2-valved but often 
indehiscent, stipitate and beaked, compressed, usually with cross-partitions 
between the seeds, but not disarticulate. 
On account of the abruptly pinnate leaves this subtribe, as well as the 
Corynellanae, is somewhat abnormal in the tribe but could not be trans- 
Jerred to the tribe Vicieae, to which it does not show any relationship in 
other ways. The structure of the flower is practically the same as in many 
genera of the subtribe Robinianae; the pod, however, is, in most of the 
genera, but slightly compressed and internally divided by false transverse 
partitions. 
The subtribe consists of the five following genera, which are thus dis¬ 
tinguished. 
Pods flattened, neither 4-winged nor 4-angled. 
Pods many-seeded, linear, with thick margins; calyx not con¬ 
spicuously oblique. 
Pod not torulose. 
Flowers middle-sized or small; banner suborbicular; 
blades of the broad keel-petals with an auricle; seeds 
subcylindric-oblong. 8. Sesban. 
Flowers large; banner elliptic; blades of the rather 
narrow keel-petals without a basal auricle; seeds reni- 
form-oblong. 9. Agati. 
Pod torulose; banner suborbicular, equaling the other 
petals; blades of the broad keel-petals without a basal 
auricle; seeds reniform-oblong. 10. Daubentoniopsis. 
