RUTACEAE. Ill 



CALOPHACA. 



Deciduous shrubs (or grafted as small standard trees) with 

 slender terete twigs ; small roundish continuous pith ; alternate 

 minute low roundish leaf-scars with a single bundle-trace ; 

 narrow stipule-scars or persistent triangular stipules ; small 

 sessile buds with few loose scales ; odd-pinnate leaves with small 

 round entire sessile leaflets ; rather large perfect papilionaceous 

 flowers in sparse racemes ; and terete pods. 



Leaflets about 15 : flowers under 10. C. wolgarica. 



Leaflets about 20: flowers about 12. C. grandiflora. 



PUERARIA. Kudzu Vine. 



Herbaceous twining plants, woody and persistent only at 

 the base, with alternate trifoliolate leaves with very large-lobed 

 leaflets; and (in warm enough regions) perfect purple papilion- 

 aceous flowers in axillary spikes, followed by long legumes. 

 Leaflets rather rhombic-ovate, ciliate. P. hirsuta. 



Family RUTACEAE. Rue Family. 



A moderate sized family, chiefly important commercially as 

 producing the Citrus fruits ; somewhat used in ornamental 

 planting. 



TRIPHASIA. Limeberry. 



Evergreen shrubs with pale hard wood with minute diffused 

 ducts and fine medullary rays ; rather slender green twigs ; 

 paired axillary spines ; no stipule scars ; alternate trifoliolate 

 pellucid-punctate leaves ; moderately small perfect polypetalous 

 white fragrant flowers solitary in the axils ; and thick-skinned 

 red berries with i or more very large seeds. 

 Glabrous : terminal leaflet enlarged. T. trifolia. 



PTELEA. Hop Tree. 



Deciduous shrubs or small trees with soft wood with larger 

 crowded vernal ducts and small summer ducts in wavy tan- 

 gential patterns, and fine medullary rays ; rather slender round- 

 ish twigs with round continuous pith ; alternate little-raised 

 finally horseshoe-shaped leaf-scars with 3 bundle-traces ; no 

 stipule-scars ; small hairy superposed lateral buds but no end bud ; 



