Part 2, 1921] RUBIACEAK 105 



acutish, minutely papillose-puberulent within, erect or ascending; anthers subsessile, included, 



2.5-3 mm. long; style included or exserted; capsule subglobose, 5-7 mm. broad, bisulcate, one 



fourth to one third superior, rounded or subretuse at the apex; seeds dark-brown, about 3 



mm. broad, broadly winged. 



Type locality: Mexico. 



Distribution: Dry soil, western Texas to Sonora, Oaxaca, and Veracruz. 



Illustrations: Cav. Ic. pi. 305; Jacq. Hort. Schoenb. pi. 257; Salisb. Parad. L,ond. pi. 88; 

 Bot. Mag. pi. 1054, 3781; Bot. Reg. 2: pi. 107; Fl. Serres pi. 904, 1024; E. & P. Nat. Pfl. 4 4 : /. 18, A-E. 



10. Bouvardia subcordata Standley, sp. no v. 



Shrub, the branches stout, subangulate, grayish, villosulous when young; stipule-sheath 



very short, long-cuspidate, glandular-dentate; leaves opposite, the petioles stout, 1-3 mm. 



long, the blades rounded-ovate or broadly ovate, 2.5-4.2 cm. long, 1.5-3.5 cm. wide, broadly 



rounded to cordate at the base, acute to very obtuse at the apex, sometimes rounded and 



broadly short-acuminate, thin, dark-green above, sparsely villous, much paler beneath, densely 



short-villous along the veins and sparsely villous elsewhere, the lateral veins conspicuous, 



arcuate; flowers in terminal clusters of 3-5, the pedicels slender, 2-5 mm. long; hypanthium 



subglobose, 1.5 mm. long, densely villous; calyx-lobes oblong-linear or lance-oblong, 2-6 mm. 



long, sparsely or densely villous; corolla red (?), sparsely villous outside above, the tube about 



3 cm. long, tapering from top to base, 3.5-4 mm. thick above, sparsely villous within, the lobes 



ovate-orbicular, 3-4 mm. long, erect, obtuse, subapiculate, finely papillose within; anthers 



sessile, included, 2.5 mm. long; style included. 



Type collected between Rosario and Colomas, Sinaloa, July 13, 1897, J. N. Rose 1628 (U. S. 

 Nat. Herb. no. 300476). 



11. Bouvardia macilenta Blake, Contr. Gray Herb. 53: 65. 



1918. 



Branches suffrutescent, slender, grayish, puberulent or glabrate, the branchlets densely 

 hispidulous with short grayish spreading hairs; leaves opposite, the petioles about 0.5 mm. long, 

 minutely hispidulous, the blades lanceolate or ovate-lanceolate, 8-1 1 mm. long, 2-3.5 mm. wide, 

 rounded or subcordate at the base, acuminate at the apex, green above, sparsely and minutely 

 strigillose or glabrate, paler beneath, hispidulous at the base of the costa and on the margin, 

 elsewhere glabrous; cymes 3-5-flowered, the pedicels 1-2 mm. long; hypanthium glabrous, 

 2.5-3 mm. long; calyx-lobes linear-subulate, acuminate, 2 mm. long; corolla 2 cm. long, glab- 

 rous outside and within, red, the lobes broadly ovate, 2.7 mm. long, subobtuse; anthers 3 mm. 

 long, included; capsule subglobose, didymous, glabrous, 4 mm. in diameter. 



Type locality: Cerro El Zopilote, Miahuatlan. Oaxaca, altitude 2100 meters. 

 Distribution: Known only from the type locality. 



12. Bouvardia versicolor Ker, Bot. Reg. 3: pi. 245. 1817. 



? Bouvardia triflora hirsnta Mart. & Gal. Bull. Acad. Brux. II 1 : 236. 1844. 

 Bouvardia bicolor Kunze, Linnaea 20: 24. 1847. 



Shrub, much branched, the branches usually slender, terete, grayish, densely puberulent 

 or hirsutulous when young, the internodes short or elongate; stipule-sheath short, often pluri- 

 aristate; leaves opposite, the petioles slender, 2-3 mm. long, the blades mostly ovate, sometimes 

 lanceolate or broadly ovate, rounded or very obtuse at the base, acute to attenuate at the 

 apex, thin, bright-green above, scaberulous, beneath slightly paler, hirsutulous along the 

 veins, elsewhere scaberulous, the lateral veins evident, arcuate-ascending at an acute angle; 

 flowers mostly in 3-5-flowered terminal cymes, these sessile or short-pedunculate, the pedicels 

 slender, 2-6 mm. long, densely puberulent or hirsutulous, the flowers sometimes pendulous; 

 bracts often large and leaf-like; hypanthium subglobose, 1.5-2 mm. long, densely puberulent 

 or short-hirsutulous ; calyx-lobes lance-linear, 2-4.5 mm. long, scaberulous; corolla red, or 

 sometimes yellow at first, glabrous outside, the tube 2.2-3.4 cm. long, tapering from top to 

 base, 3.5-4 mm. thick above, sparsely villous within, the lobes ovate-oblong or triangular- 



