TKEES AND SHRUBS OF MEXICO 



By Paul C. Standley. 



150. BIGNONIACEAE. Bignonia Family. 



Trees or shrubs, often woody vines; leaves opposite or ternate, simple or usually 

 compound, the terminal leaflet frequently replaced by a tendril; flowers perfect, 

 irregular, usually large and showy; calyx inferior, gamosepalous, often closed in 

 bud, spathaceous, truncate, or 5-dentate; corolla gamopetalous, the limb 5-lobate, 

 the lobes usually somewhat unequal; stamens usually 4, inserted on the upper 

 part of the corolla tube; fruit capsular or baccate, often very large. 



Pyrostegia venusta (Ker) Baill. is often cultivated in Mexico. It is a vine with 

 bifoliolate leaves and large clusters of long narrow red-orange flowers, native of 

 Brazil. In El Salvador it is called "San Carlos." Tecomaria capensis (Thunb.) 

 Fenzl, a native of South Africa, also is frequently cultivated. It is a vine with 

 pinnate leaves and large, orange-red or scarlet, very showy flowers, 

 Plants scandent; leaves, at least some of them, with tendrils, and bifoliolate. 



Tendrils with sharp-pointed hooked tips; corolla yellow 1. BIGNONIA. 



Tendrils without sharp-pointed hooked tips; corolla not yellow. 



Disk absent. Flowers purple or pink; fruit linear 2. CYDISTA. 



Disk present at base of ovary. 



Calyx apparently double, with 2 or 3 interior lobelike appendages. Flow- 

 ers purple or pink; capsule oblong-elliptic, smooth. 



3. AMPHILOPHIUM. 

 Calyx simple, not appendaged. 



Corolla white, turning yellowish; fruit muricate, oblong or elliptic. 



4. PITHECOCTENIUM. 

 Corolla pink, purple, or orange-red; fruit not muricate. 

 Corolla orange-red, coriaceous, 9 to 11 cm. long. 



5. PHAEDBANTHUS. 

 Corolla pink or purple; corolla less than 9 cm. long. 

 Capsule oblong or ellipsoid. 



Corolla coriaceous 6. DISTICTIS. 



Corolla thin 7. ADENOCALYMNA. 



Capsule linear. Corolla thin. 



Calyx campanulate or tubular-campanulate_8. ARBABIDAEA. 

 Calyx broadly campanulate or saucer-shaped. 



9. PETASTOMA. 

 Plants erect; leaves never with tendrils, simple, digitately 5 to 9-foliolate, pinnate, 

 or rarely 3-foliolate. 



Leaves pinnate. Flowers yellow 10. TECOMA. 



Leaves simple or digitately compound. 



Leaflets 5 to 9; petioles not winged; fruit capsular. 



Stamens pubescent; leaflets usually 7 or 9; corolla yellow. 



11. QODMANIA. 



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