108 NORTH AMERICAN FLORA [Volume 32 



? Bouvardia Schiedeana Schlecht. Linnaea 26: 123. 1854. 



Houstonia iriflora A. Gray, Proc. Am. Acad. 4: 314. 1860. 



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



Bouvardia versicolor graciliflora A. Gray, in S. Wats. Proc. Am. Acad. 22: 416. 1887. 



Shrub, 1-1.5 meters high, the branches stout or slender, terete or subangulate, brown or 

 grayish, rimose, finely puberulent when young; stipule-sheath short, long-cuspidate, dentate or 

 laciniate; leaves opposite, the petioles slender, 1-6 mm. long, puberulent, the blades lanceolate, 

 ovate, or broadly ovate, 1.5-5 cm. long, 0.4-1.6 cm. wide, very obtuse to acuminate at the base, 

 short-decurrent, acute to attenuate at the apex or rarely obtuse, thin, subconcolorous, finely 

 puberulent or scaberulous, sometimes glabrate in age; flowers in terminal and axillary, 3-5- 

 fiowered, sessile or short-pedunculate cymes, the pedicels 3 mm. long or shorter; hypanthium 

 densely whitish-hirsutulous; calyx-lobes oblong-lanceolate or lance-subulate, 2-10 mm. long, 

 hirtellous; corolla white or greenish-white, glabrous outside, the tube slender, 10-15 mm. long, 

 1.5-2 mm. thick in the throat, sparsely villous within near the base, the lobes oblong, spreading, 

 4-5 mm. long, acute or acutish, glabrous within; filaments usually elongate, the anthers ex- 

 serted, 1-1.5 mm. long; capsule didymous-globose, 4-6 mm. broad, almost wholly inferior, 

 glabrous, the pedicel usually recurved; seeds orbicular, 2-3 mm. broad, dark-brown, broadly 

 winged. 



Type locality: Mexico. 



Distribution: Cliffs and rocky hillsides. Chihuahua to Queretaro and Guerrero. 



Illustrations: Cav. Ic. pi. 572, f. 2; H. B. K. Nov. Gen. & Sp. pi. 288. 



20. Bouvardia quinquenervata Standley, sp. nov. 



Shrub, the branches slender, terete, grayish, minutely hirtellous when young, the in- 

 ternodes elongate; stipule-sheath 3 mm. long or shorter, the lobes acute, cuspidate, dentate; 

 leaves opposite, the petioles slender, 3-4 mm. long, the blades of the lower leaves rounded- 

 deltoid, 3.5-5 cm. long, 2.7-3 cm. wide, subtruncate at the base, acute or acuminate at the 

 apex, those of the upper leaves ovate or lanceolate, 4-5.5 cm. long, 1.5-2.5 cm. wide, acute to 

 rounded at the base, subabruptly long-attenuate at the apex, thin, bright-green above, slightly 

 paler beneath, obscurely puberulent along the veins, 5-nerved from the base, the lateral nerves 

 subarcuate, extending almost to the apex; inflorescence terminal, cymose-corymbose, few- or 

 many-flowered, the pedicels 2-6 mm. long; hypanthium hirtellous, 1.5 mm. long; calyx-lobes 

 linear-subulate, 1.5-3 mm. long; corolla sparsely hirtellous outside, the tube 6-8 mm. long, 

 slender, sparsely hirtellous within, the lobes oblong or triangular-oblong, about 3 mm. long, 

 acute, glabrous within; filaments elongate, the anthers exserted, 2 mm. long; style exserted; 

 capsule globose-oblong, 3.5-4 mm. long, 3-3.5 mm. wide, shallowly bisulcate, short-hirtellous ; 

 seeds broadly winged. 



Type collected at San Bartolome, Chiapas, March, 1904, E. A. Goldman 769 (U. S. Nat. Herb. 

 no. 470574). 



Distribution: Chiapas. 



21. Bouvardia Rekoi Standley, sp. nov. 



Shrub, the branches slender, grayish, subterete, glabrous or obscurely pruinose-puberulent, 

 the internodes elongate; stipules triangular, 2-2.5 mm. long, acute, entire; leaves opposite, the 

 petioles 1-2 mm. long, pruinose-puberulent, the blades lanceolate, ovate, or narrowly tri- 

 angular-ovate, broadest at the base, 3-6.5 cm. long, 1-2.5 cm. wide, rounded or truncate at 

 the base, gradually or subabruptly long-attenuate to the apex, membranaceous, subconcolorous, 

 glabrous, palmately 3- or 5-nerved, the 2 chief lateral nerves extending to the apex, the in- 

 termediate nerves closely prominulous-reticulate; inflorescence terminal, cymose-corymbose, 

 few-flowered, the pedicels filiform, 8-11 mm. long, glabrous; hypanthium glabrous, hemispheric, 

 1-1.2 mm. long; calyx-lobes broadly deltoid-acuminate, shorter than the tube; corolla glabrous 

 outside, the tube 14 mm. long, villous within in the lower part, the lobes triangular-oblong, 

 3-4.5 mm. long, acute, glabrous within; anthers included. 



Type collected at Cafetal Montecristo (Cerro Espino), Oaxacp, altitude 1000 meters, December 

 7, 1917, B. P. Reko 3650 (U. S. Nat. Herb. no. 867149). 



