102 NORTH AMERICAN FLORA [Volume 32 



2. Bouvardia bouvardioides (Seem.) vStandley. 



Hedyotis bouvardioides Seem. Bot. Voy. Herald 296. 1856. 

 Houstonia bouvardioides Benth. & Hook. Gen. PL 2: 60. 1873. 



Stems stout, terete or subangulate, pruinose-puberulent above, glabrous below, the 

 internodes elongate; stipule-sheath 3 mm. long or shorter, long-cuspidate, usually pluriaristate ; 

 leaves mostly ternate, the petioles slender, 3-6 mm. long, pruinose-puberulent, the blades 

 ovate to lanceolate, 6-10 cm. long, 2.5-3.5 cm. wide, rounded or obtuse at the base, long- 

 attenuate to the apex, thin, bright-green, subconcolorous, very sparsely and minutely puberu- 

 lent or scaberulous or glabrate, the lateral veins conspicuous, arcuate; inflorescence terminal, 

 densely cymose-corymbose, many-flowered, 6-10 cm, broad, the pedicels slender, 2-4 mm. long; 

 hypanthium hemispheric, 1.5 mm. long, densely puberulent or hirsutulous; calyx-lobes linear 

 or lance-linear, 2-5 mm. long, hirsutulous; corolla red, glabrous outside, the tube 10-15 mm. 

 long, 3 mm. thick above, tapering from the top to the base, villous within, the lobes ovate- 

 oblong, 3-5 mm. long, erect or ascending, obtuse or acutish, glabrous within; filaments elongate, 

 exserted, the anthers 1.5-2 mm. long; style exserted. 



Type locality: Sierra Madre [Durango?]. 



Distribution: Mountains of Durango and Jalisco. 



Illustration: Seem. Bot. Voy. Herald pi. 64. 



3. Bouvardia viminalis Schlecht. Linnaea 26: 120. 1854. 



Shrub, the branches slender or stout, terete or subangulate, densely whitish-villosulous 

 or tomentulose when young, the internodes mostly elongate; stipule-sheath 5 mm. long or 

 shorter, long-cuspidate or pluriaristate; leaves mostly ternate, sessile or subsessile, the blades 

 ovate, lance-oblong, or broadly ovate, 3-5.5 cm. long, 0.7-2.5 cm. wide, rounded or obtuse at 

 the base, acuminate to long-attenuate at the apex, thin, bright-green above, scaberulous or 

 villosulous, paler beneath, densely or sparsely villous-tomentose with short whitish hairs, the 

 lateral veins conspicuous, arcuate-ascending; inflorescence terminal, cymose-corymbose or 

 cymose-capitate, dense, many- flowered, 4-6 cm. broad, the pedicels 3 mm. long or shorter; 

 hypanthium subglobose, 1.5 mm. long, densely hirsutulous or sh ort- villous ; calyx-lobes linear 

 or lance-linear, 2.5-4.5 mm. long, white-hirsutulous; corolla red, glabrous outside, the tube 

 15-17 mm. long, 2 mm. thick above, villous within near the base, the lobes ovate, obovate- 

 oblong, or broadly ovate, 5-6 mm. long, obtuse or acutish, apiculate, glabrous within, spreading; 

 filaments very short or elongate, the anthers included or exserted, 2 mm. long; style usually 

 exserted. 



Type locality: Mexico, the exact locality not known. 



Distribution: Puebla and Oaxaca. 



4. Bouvardia scabra H. & A. Bot. Beech. Voy. 427. 1840. 



Bouvardia obovata Benth. PI. Hartw. 16. 1839. Not B. obovata H. B. K. 1820. 



Herbaceous or suffrutescent, 4-6 dm. high, the stems simple or sparsely branched below, 

 very stout, subangulate or terete, densely villous with long yellowish hairs, the internodes 

 elongate; stipule-sheath 3 mm. long or shorter, aristate-cuspidate; leaves 3-4-verticillate, 

 sessile or short-petiolate, the blades rhombic-orbicular, elliptic-oval, rhombic-ovate, or ovate, 

 3.5-7.5 cm. long, 1.5-4.8 cm. wide, obtuse or acute at the base, rounded and abruptly short- 

 acuminate, acute, or attenuate at the apex, thick, bright-green above, densely scabrous or 

 short-villous with stiff hairs, paler beneath, densely and very coarsely villous along the veins, 

 elsewhere scabrous, the veins very prominent beneath, the lateral ones numerous, arcuate- 

 ascending, the secondary veins usually prominently reticulate; inflorescence terminal and 

 axillary, cymose-corymbose, often long-pedunculate, densely many-flowered, 5-14 cm. broad, 

 the pedicels stout, 5 mm. long or shorter; hypanthium 2-2.5 mm. long, densely hirsutulous or 

 short-villous; calyx-lobes linear or linear-subulate, 8-12 min. long, hirsutulous; corolla red, 

 glabrous outside, the tube 17-21 mm. long, 2-2.5 mm. thick above, densely villous within 

 near the base, the lobes broadly ovate or oblong-ovate, 6-8 mm. long, obtuse or acutish, 

 apiculate, glabrous within, spreading; anthers nearly sessile, included, 1.5-2 mm. long; style 

 included or exserted; capsule subglobose, 6-7 mm. broad, hirsutulous, wholly inferior; seeds 

 dark-brown, broadly winged. 



TYPB locality: Tepic, Tepic. 



Distribution: Jalisco and Tepic. 



