Part 3, 1918] ALLIONIACEAE 201 
young but soon glabrate, the veins coarse and very prominent beneath; involucres numerous, 
5-7 mm. long, on slender peduncles 3.5 cm. long or shorter, the lobes rounded-obovate, apicu- 
late, puberulent and usually short-villous, finely reticulate-veined; perianth 7-8 mm. long, 
white or pink, short-villous outside; fruit pale-brown or olive, 3.5 mm. Iong, 3-costate on the 
inner surface, coarsely and shallowly rugose, the margins incurved or spreading, each with 5-8 
long slender teeth, the outer surface bearing 2 rows of long-stipitate glands; seed narrowly 
obovate, 2 mm. long, pale-brown. 
TyP# LOCALITY: Near the City of Mexico, Mexico. 
DISTRIBUTION: In dry sandy soil, Arizona to western Texas, Durango, Zacatecas, and Oaxaca; 
probably also in southeastern Utah and southwestern Colorado. 
14. NYCTAGINIA Choisy, in DC. Prodr. 132: 429. 1849. 
Perennial herbs with tuberous roots, much branched, viscid-pubescent. Leaves opposite, 
petiolate, the blades broad, entire or sinuate. Flowers perfect, in long-pedunculate, axillary 
and terminal, many-flowered heads, each head surrounded by an involucre of numerous narrow 
unequal bracts; perianth deep-red, funnelform, the tube slender, elongate, constricted above 
the ovary, abruptly expanded into a 5-lobed induplicate-plicate limb (or the limb rarely, 
perhaps abnormally, 6-lobed), the lobes entire or emarginate. Stamens 5-8; filaments capil- 
lary, unequal, dilated and connate at the base, adnate to the perianth-tube; anthers didymous, 
exserted. Ovary oblong; style filiform, exserted; stigma capitate, papillose. Anthocarp 
coriaceous, turbinate, constricted above the base, umbonate at the apex, finely costate. Seed 
with a membranaceous testa adherent to the pericarp; embryo uncinate, the broad cotyledons 
enclosing the copious farinaceous endosperm; radicle elongate, descending. 
Type species, Nyciaginia capitaia Choisy. 
1. Nyctaginia capitata Choisy, in DC. Prodr. 137: 429. 1849. 
Boerhaavia aggregata Pavon; Choisy, in DC. Prod. 13%: 429, as synonym. 1849. 
Nyctaginia ovata Choisy, Mém. Soc. Phys. Genéve 12: 167. 1849. 
Boerhaavia capitata Heimerl, Beitr. Syst. Nyct. 28. 1897. 
Nyctaginia Cockerellae A. Nelson, Proc. Biol. Soc. Wash. 16: 29. 1903. 
Plants erect or decumbent from a tuberous turbinate root sometimes 4.5 cm. in diameter 
and 10 cm. long, much branched from the base, the branches stout, 1-4 dm. long, viscid- 
villous or in age glabrate; petioles 1-6 cm. long, those of the lower leaves often longer than 
the blades; leaf-blades broadly oval to ovate-deltoid, deltoid, or narrowly triangular, often 
hastately lobed, 4-9 cm. long, 0.6-5.5 cm. wide, subcordate to cuneate at the base and decur- 
rent, ustially unequal, rounded to long-attenuate at the apex, thick and slightly fleshy, glaucous 
beneath, entire or sinuate, often crispate, copiously viscid-villous when young, often glabrate 
in age; peduncles 2-14 cm. long; bracts numerous, 6-15 mm. long, the outer ones ovate or 
oblong, very acute, the inner linear, long-attenuate, densely viscid-villous; perianth 3-4 cm. 
long, densely viscid-villous outside, the limb 10-14 mm. broad; fruit 5 mm. long and 4 mm. in 
diameter, olive, glabrous; seed turbinate, 3 mm. long and nearly as broad, abraptly constricted 
at the base, pale-brown. 
Type Locality: San Antonio, Texas. . 
DISTRIBUTION: In dry soil, western Texas and southeastern New Mexico to Durango and 
Nuevo Leén. 
ILLUSTRATION: Mém. Soc. Phys. Genéve 12: pl. 1. 
15. ACLEISANTHES A. Gray, Am. Jour. Sci. II. 15: 259. 1853. 
Pentacrophys A. Gray, Am. Jour. Sci, II. 15: 259. 1853. 
Low shrubs or perennial herbs, erect or prostrate, with dichotomous pubescent stemis. 
Leaves opposite, petiolate, those of a pair sometimes very unequal, the blades entire or undu- 
late, usually fleshy. Flowers axillary, solitary or in 3-flowered cymes, 1-3-bracteate; perianth 
funnelform, corolla-like, the tube much elongate and slender, constricted above the ovary, 
the limb shallowly 5-lobed, the lobes induplicate-plicate. Stamens 2-5; filaments filiform, 
unequal, exserted, connate into a short cup at the base. Ovary ovoid or oblong; style filiform, 
exserted; stigma capitate, smooth. Anthocarp oblong-cylindric, truncate, constricted below 
