ParT 3, 1918] ALLIONIACEAE 191 
ginate, deep-green, concolorous, glabrous, or sparsely puberulent beneath along the veins, the 
margins plane, the lateral veins prominent, arcuately divergent or ascending; peduncles stout, 
1-3 cm. long, puberulent when young but soon glabrate; staminate inflorescence densely corym- 
bose, 2-3 cm. broad, the flowers very shortly and stoutly pedicellate or sessile, green or greenish- 
yellow, the bractlets deltoid, 1 mm. long or shorter, the perianth campanulate, 3-4 mm. long, 
puberulent; stamens usually 8, nearly twice as long as the perianth; pistillate inflorescence 
loosely corymbose, 4.5—7 cm. broad, the flowers on pedicels 5 mm. long or shorter, the bractlets 
linear, 1-1.5 mm. long, the perianth 3 mm. long, cylindric; fruit cylindric or clavate, 10-13 
mm. long, 1.5 mm. in diameter, 10-striate, bearing on the upper third 5 rows of low uniseriate 
glands. 
Type Locauiry: Antigua. 
DIsTRIBUTION: Porto Rico to Martinique. 
ILLUSTRATION: E. & P. Nat. Pft. 39: f. 7, S. 
5. PISONIELLA (Heimer!) Standley, Contr. U. S. Nat. Herb. 
13: 385. 1911. 
Pisonia § Pisoniella Heimerl, in E. & P. Nat. Pfl. 312: 29. 1889. 
Erect shrubs, more or less pubescent, dichotomously much branched. Leaves opposite, 
those of a pair subequal, petiolate, the blades broad, entire. Flowers perfect, in headlike, 
pedunculate, axillary and terminal umbels, pedicellate, each pedicel subtended by a minute 
bract; perianth tubular-campanulate, slightly constricted at the middle, the limb induplicate- 
valvate, shallowly 5-lobed, the lobes rounded or subtruncate, the tube obtusely 5-angulate. 
Stamens 6-11; filaments filiform, exserted, short-connate into a fleshy ring at the base; anthers 
didymous. Ovary oblong, attenuate to a filiform style; stigma capitate, papillose. Antho- 
carp oblong-clavate, slightly curved, coriaceous, obtuse at the apex, narrowed at the base, 
5-costate, the faces smooth, the angles bearing numerous verrucose glands. Seed narrowly 
oblong, the embryo straight; cotyledons broad, enclosing the farinaceous endosperm; radicle 
short, descending. 
Type species, Boerhaavia arborescens Lag. & Rodr. 
1. Pisoniella arborescens (Lag. & Rodr.) Standley, Contr. U. S. 
Nat. Herb. 13: 385. 1911. 
Boerhaavia arborescens Lag. & Rodr. Anal. Ci. Nat. 4: 257. 1801. 
Pisonia hirtella H. B. K. Nov. Gen. & Sp. 2: 217. 1818. . 
Pisonia mexicana Willd. (Enum. Suppl. 20, hyponym. 1813); Link, Enum. Hort. Berol. 1: 354. 
1821. 
Boerhaavia octandra S. Wats. Proc. Am. Acad. 26: 145. 1891. 
Pisonia arborescens Kuntze, Rev. Gen. 3?: 265. 1898. 
Shrub 2 meters high or less, the branches ascending or spreading, slender, brownish or 
grayish, sparsely puberulent, sometimes short-villous at the nodes, soon glabrate; petioles 
slender, 3-10 mm. long; leaf-blades ovate-orbicular to rounded-oval or broadly ovate, 2.5-7 
em. long, 1.5-4 cm. wide, truncate or rounded at the base, obtuse to attenuate at the 
apex, usually rather abruptly so, thin, bright-green, slightly paler beneath, puberulent and 
short-villous, especially along the veins, ciliate, glabrate in age; peduncles 2-10 cm. long; heads 
of flowers dense, many-flowered, 12-15 mm. in diameter, the slender pedicels 1-2 mm. long, 
in age sometimes 6 mm. long; perianth 5-7 mm. long, greenish-white, viscid-puberulent; fruit 
about 1 cm. long, 1.5-2 mm. thick, dark-brown. 
Type Locality: Salvatierra, Guanajuato. 
DistRiBurion: Jalisco to Veracruz and Oaxaca 
Il. SALPIANTHEAE. Plants herbaceous, or suffrutescent at the base, 
unarmed. Leaves alternate. Flowers perfect, usually racemose; perianth 
small, green, persistent, almost unchanged in fruit, of like consistency through- 
out. Anthocarp dry, eglandular. Embryo strongly curved. 
