Part 3, 1918] ALLIONIACEAE 193 
to ovate-elliptic, 2.5-6.5 cm. long, 1-3 cm. wide, narrowed to the obtuse or acutish apex, acute 
to attenuate at the base, usually somewhat abruptly so, grayish-green, densely puberulent, 
the petioles very short, usually marginate to the base; flowers in dense racemes 2-5 cm. long, 
these forming a dense corymb 30 cm. broad; pedicels slender, 3-5 mm. long, densely short- 
villous; perianth greenish-white, 5 mm. long, 4-angulate, white-villous outside and bearing 
very numerous short gland-tipped hairs, slightly dilated above, shallowly 4-dentate, the 
teeth broadly triangular, short, obtuse or acutish, connivent; stamens 4, long-exserted, flexu- 
ous; fruit oval-ovoid, slightly compressed, 2.5 mm. long; seed dull-black, smooth. 
TYPE LOCALITY: Monte de Charnaco, Michoac4n or Guerrero, at an altitude of 810 
meters. 
DIstTRIBUTION: Known only from the type locality. 
3. Salpianthus arenarius Humb. & Bonpl. Pl. Aequin 1: 139. 1807. 
Boldoa lanceolata Lag. Gen. & Sp. Nov. 10. 1816. 
Shrub, or frutescent only at the base, 1-5 meters high, much branched, the branches 
ascending, green, terete or subangulate, soft-puberulent or short-villous, those of the inflores- 
cence densely short-villous with usually fulvous hairs; petioles slender, 5-12 mm. long; leaf- 
blades broadly ovate-rhombic to lance-ovate, 3-8 cm. long, 1.5-4.5 em. wide, very acute to 
obtuse at the apex, rarely rounded and apiculate, very abruptly acuminate at the base, bright- 
green, densely puberulent or short-villous, the veins often prominent, the lateral ones arcuate- 
ascending, the leaves of the inflorescence usually much reduced; flowers in dense racemes 1-2 
em, long with densely short-villous rachises, arranged in dense, large or small corymbs; pedicels 
slender, 2-6 mm. lomg, densely short-villous and viscid; perianth reddish-green, 6-7 mm. long, 
angulate, densely short-villous and viscid, shallowly 5-dentate, the teeth broadly triangular, 
obtuse or actutish, connivent or incurved; stamens 4, long-exserted, flexuous; fruit suborbicular, 
compressed, 2 mm. long, seed black, lustrous, smooth. 
Types LocaLity: Near Acapulco, Guerrero. 
Distripution: In sandy or alluvial soil, Jalisco to Oaxaca. 
ILLUSTRATIONS: Humb. & Bonpl. Pl. Aequin. 1: pl. 44; Poir. Tab. Encyc. Suppl. 1. 906. 
4. Salpianthus macrodontus Standley, Contr. U. S. Nat. Herb. 
13: 393. 1911. 
Boldoa lanceolata macrodonta Heimerl, Repert. Sp. Nov. 12: 222. 1913. 
Plants 1-2 meters high, herbaceous, or suffrutescent at the base, branched, the branches 
ascending, stout or slender, subangulate, puberulent; petioles slender, 4-15 mm. long; leaf- 
blades rhombic-ovate, lance-ovate, or deltoid-ovate, 3-6.5 cm. long, 1.3-3.5 cm. wide, acute 
to attenuate at the apex or often only acutish, frequently apiculate, acute to attenuate at 
the base, usually abruptly so, bright-green, very minutely puberulent or scaberulous; flowers in 
dense racemes 1-2 cm. long, the rachises puberulent, forming dense, broad or narrow cymes; 
pedicels slender, 2-5 mm. long, puberulent or short-villous; perianth reddish-green, 6 mm. 
long, angulate, finely glandular-puberulent, and with a few very short, villous hairs along the 
angles, 4-dentate, the teeth triangular or oblong, usually longer than broad, acute or acutish, 
erect or slightly spreading; stamens 4, long-exserted, flexuous; fruit suborbicular, compressed, 
1.5 mm. long; seed black, lustrous, smooth. 
Type LocALity: On cliffs along the sea near the signal station at Mazatlan, Sinaloa. 
DistrRiButTION: In dry soil, Sonora and Sinaloa. 
III. BOUGAINVILLEAE. Shrubs, erect or scandent, armed with spines. 
Leaves alternate. Flowers perfect, in clusters of 3, each flower adherent to 
the costa of a foliaceous, often brightly colored bract; perianth small, greenish, 
the free portion persistent. Anthocarp dry, eglandular, adnate to the bracts. 
Embryo curved. 
