20 



CENTROSEMA Benth. 



Centrosema virginiana (L.) Benth. 



Bradburya virginiana (L.) Kuntze. 



Chapman Flora, p. 117; Small Flora, p. 651; Britton and Browne HL 

 Flora, vol. II, p. 333, Figure 2223. 



June to October. 



Distribution: — New Jersey to Florida; Arkansas, Louisiana and 

 Texas. 



Louisiana: — Dry pine woods throughout the State. 



APIOS Moench. 

 Apios tuberosa Moench. 



Apios apios (L.) MacM. 



Chapman Flora, p. 115; Small Flora, p. 652; Britton and Browne I1L 

 Flora, vol. II, p. 335, Figure 2227. 



July. 



Distribution: — New Brunswick to Florida and Louisiana. 



Louisiana: — In swamps and along small streams throughout State. 

 Nowhere abundant. 



PHASEOLUS L. 



Phaseolus polystachyus (L.) B. S. P. 



Phaseolus pereunnis Walt. 



Chapman Flora, p. 116; Small Flora, p. 653; Britton and Browne 111. 

 Flora, vol. II, p. 338, Figure 2234. 



July. 



Distribution: — Canada to Minnesota; Florida and Louisiana. 



Louisiana: — In partly cleared woods throughout State. 



STEOPHOSTYLES Ellis. 



Strophostyles helvola (L.) Britton. 



Phaseolus helvolus L. 



Chapman Flora, p. 116; Small Flora, p. 63; Britton and Browne 111. 

 Flora, vol. II, p. 338, Figure 2235. 



June to October. 



Distribution: — Quebec to Minnesota; Massachusetts; Florida to 

 Texas. 



Louisiana: — In sand, specially abundant on the battures of the Mis- 

 sissippi, where it is usually erect, sometimes forming the exclusive cover- 

 ing of the ground; elsewhere, climbing. 

 Strophostyles pauciflora (Benth.) S. Wats. 



Phaseolus pauciflorus Benth. 



Chapman Flora, p. 116; Small Flora, p. 63; Britton and Browne 111. 

 Flora, vol. II, p. 339, Figure 2237. 



August. 



Distribution: — Minnesota to Indiana; Nebraska, Louisiana, Texas. 



Louisiana: — Banks of streams, throughout the State. 

 Strophostyles pauciflora var. canescens. 



September. 



Distribution: — Louisiana: This form is very abundant in the sandy 

 beach at Cameron, just outside tide line, twining around Aster spinosus, 

 Lycium carolianum and other shrubs in the drifting sands. Densely 

 canescent, both leaves, stem and flowers. 



