Part 2, 1921] RUBIACEAE 111 



included, about 2.5 mm. long; style included or exserted; capsule subglobose, about 6 mm. 



in diameter. 



Type locality: San Jos6, Costa Rica. 

 Distribution: Guatemala to Costa Rica. 



29. Bouvardia latifolia Standley, sp. nov. 



Shrub, about 1.5 meters high, the branches stout, terete or subangulate, grayish, scaberu- 

 lous when young ; stipule-sheath short, long-cuspidate, glandular-dentate ; leaves opposite, the 

 petioles stout, 2-4 mm. long, pruinose-puberulent, the blades broadly ovate or rounded-ovate, 

 2.5-4 cm. long, 1.5-2.5 cm. wide, broadly rounded or subtruncate at the base, acute or acutish 

 at the apex, thin, pale-green, concolorous, finely puberulent beneath along the veins or glabrous, 

 the lateral veins conspicuous, usually 3 on each side, arcuate-ascending; inflorescence terminal, 

 3-5-flowered, sessile or long-pedunculate, the pedicels stout, 3 mm. long or shorter, scaberulous; 

 hypanthium subglobose, 1-1.5 mm. long, scaberulous; calyx-lobes triangular or lance-tri- 

 angular, 1-1.5 mm. long, acute, scaberulo-ciliolate; corolla pure white, glabrous outside, the 

 tube 3-3.3 cm. long, 2 mm. thick above, glabrous within, the lobes oblong or elliptic, 6-7 mm. 

 long, obtuse or acutish, spreading, glabrous within; anthers nearly sessile, 1.5-2 mm. long, 

 included; style exserted. 



Type collected on Monte de la Piedra, near Aguila, Guerrero, altitude 450 meters, July, 1898, 

 E. Langlasse 246 (U. S. Nat. Herb. no. 385804). 



30. Bouvardia longiflora (Cav.) H. B. K. Nov. Gen. & Sp. 

 3:386. 1820. 



Aeginetia longiflora Cav. Anal. Ci. Nat. 3: 130. 1801. 

 Honstonia longiflora A. Gray, Proc. Am. Acad. 4: 314. 1860. 



Shrub, the branches stout, subangulate, brown or grayish, glabrous or nearly so when 

 young, the internodes very short; stipules 3-6 mm. long, lance-triangular, lobed or laciniate, 

 green; leaves opposite, the petioles stout, 2-6 mm. long, glabrous, the blades ovate or lance- 

 olate, 2-4.5 cm. long, 0.6-1.7 cm. wide, acute to attenuate at the base and abruptly decurrent, 

 acute to attenuate at the apex, thin, yellowish-green, concolorous or nearly so, glabrous, the 

 lateral veins slender, plane, ascending at a very acute angle ; flowers solitary, terminal, sessile 

 or short-pedicellate; hypanthium glabrous, 2-3 mm. long; calyx-lobes linear to lanceolate, 

 8-18 mm. long, green, acute to attenuate, glabrous, scaberulo-ciliolate; corolla white, glabrous, 

 the tube slender, 4-8.5 cm. long, 2-3 mm. thick, the lobes spreading, oblong or oblong-oval, 

 1.5-2.8 cm. long, 7-10 mm. wide, acute or acuminate; anthers sessile, linear, 5 mm. long, 

 included; style-branches very slender, elongate; capsule subglobose, 8 mm. in diameter, bisul- 

 cate, subcostate, broadly rounded at the apex; seeds suborbicular, 2-3 mm. long, dark-brown, 

 broadly winged. 



Type locality: Near Queretaro and Guanajuato, Mexico. 



Distribution: San Luis Potosi to Oaxaca. 



Illustrations: Cav. Ic. pi. 572, f. 1; Bot. Mag. pi. 4223; Fl. Serres 2: pi. 10. 



Doubtful species 



Bouvardia chlorantha Bertol.; R. & S. Syst. Veg. Mant. 3: 116. 1827. (Houstonia 

 chlorantha Bertol. Elench. 5. 1820. Houstonia ochroleuca Raf. Ann. Gen. Sci. Phys. 5: 226. 

 1820.) Described from cultivated plants. Leaves opposite. 



Bouvardia cordifolia DC. Prodr. 4: 366. 1830. Mexico. The description and poor 

 illustration (Moc. & Sesse, Calq. Dess. pi. 487) are insufficient for the determination of the 

 species. 



Bouvardia rosea Schlecht. Linnaea 26: 116. 1854. The description is very ample 

 but no specimens have been seen which agree with it. Possibly it is B. tenuifolia, but the 

 corolla is described as glabrous. 



Bouvardia xylosteoides H. & A. Bot. Beech. Voy. 428. 1840. Described from 

 Oaxaca. Probably not of this genus. 



Hedyotis lutea Sesse & Moc. Fl. Mex. 22. 1893. Described from Mexico. Probably 

 the same as Bouvardia cordifolia DC. Its identity is doubtful from the description. 



