1364 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



Houstonia triflora A. Gray, Proc. Amer. Acad. 4: 314. 1860. 



Bouvardia gracilis A. Gray, Proc. Amer. Acad. 22: 306. 1887, 



Bouvardia versicolor graciliflora A. Gray in S. Wats. Proc. Amer. Acad. 22: 416. 



1887. 

 Chihuahua to Jalisco, Guerrero, and Puebla. 



Shrub, 1 to 1.5 meters high; leaves petiolate, 1.5 to 5 cm. long, obtuse or acute 

 at base, finely puberulent or scaberulous; capsule 4 to 6 mm. broad. 



20. Bouvardia quinquenervata Standi. N. Amer. Fl. 32: 108. 1921. 

 Chiapas; type from San Bartolom6. 



Shrub; leaves short-petiolate, rounded-deltoid to ovate or lanceolate, 3.5 to 

 5.5 cm. long, acute or acuminate, obscurely puberulent along the nerves; corolla 

 tube 6 to 8 mm. long. 



21. Bouvardia oazacana Standi. Journ. Washington Acad. Sci. 13: 7. 1923. 

 Type collected between Santa Cruz and El Aguacate, Distrito de Juquilla, 



Oaxaca. 



Leaves short-petiolate, ovate or broadly ovate, 4 to 6 cm. long, acuminate, 

 broadly rounded at base, sparsely puberulent or glabrate, conspicuously 5-nerved; 

 corolla red, the tube about 17 mm. long, the oblong lobes 5 mm. long. 



22. Bouvardia rekoi Standi. N. Amer. Fl. 32: 108. 1921. 



Type from Cafetal Montecristo, Cerro Espino, Oaxaca, altitude 1,000 meters. 

 Slender shrub; leaves subsessile, lanceolate or ovate, 3 to 6.5 cm. long, acumi- 

 nate, glabrous; corolla tube 14 mm. long. 



23. Bouvardia gracilipes Robinson, Proc. Amer. Acad. 45: 404. 1910. 

 Type from Tepic. 



Slender shrub; leaves short-petiolate, ovate or lance-oblong, 3.5 to 6.5 cm. 

 long, acuminate, rounded at base; capsule 4 to 6 mm. broad. 



24. Bouvardia dictyoneura Standi. N. Amer. Fl. 32: 109. 1921. 

 Chiapas; type from Chicharras. 



Slender shrub; leaves sessile or subsessile, lanceolate or lance-ovate, 3 to 9 cm. 

 long, long-acuminate, rounded at base; corolla tube 11 mm. long. 



25. Bouvardia rosei Standi. N. Amer. Fl. 32: 109. 1921. 

 Type from the Sierra Madre of Durango. 



Shrub; leaves 2 to 3.5 cm. long, obtuse to short-acuminate, glabrous beneath; 

 cymes mostly 3 or 5-flowered; corolla white, glabrous, the tube 4.5 to 6 cm. long. 



26. Bouvardia induta (Robinson) Standi. N. Amer. Fl. 32: 109. 1921. 

 Bouvardia longiflora induta Robinson, Proc. Amer. Acad. 45: 404. 1910. 

 Chiapas. 



Shrub, about 40 cm. high; leaves ovate or lance-ovate, 2 to 3 cm. long, acute 

 or acuminate, viUous-tomentose beneath; cymes mostly 3-fiowered; corolla tube 

 4 to 5 cm. long. 



27. Bouvardia langlassei Standi. N. Amer. Fl. 32: 110. 1921. 



Guerrero and Puebla; type from Testla (Guerrero ?), altitude 1,500 meters. 



Shrub, about 1 meter high; leaves ovate or lanceolate, 2 to 4 cm. long, obtuse 

 to acuminate, hirtellous or villosulous beneath; flowers terminal, solitary; 

 corolla white, the tube 4.5 to 5.5 cm. long. 



28. Bouvardia erecta (DC.) Standi. N. Amer. Fl. 32: 110. 1921. 

 Catesbaea erecta DC. Prodr. 4: 401. 1830. 



Hedyotis spinescens Sesse & Moc. Fl. Mex. 22. 1893. 



Bouvardia flos-johannis Schum. Bull. Herb. Boiss. 3: 621. 1895. 



Bouvardia flos-johannis latifolia Loesener, Repert, Sp. Nov. Fedde. 18:358. 



1922. 

 Puebla; type from Tehuacdn. 



