Part 3, 1918] ALLIONIACEAE 33 
the 5 lobes equaling or usually shorter than the tube, ovate-orbicular to triangular, rounded 
and apiculate to very acute; perianth purplish-red, 4~5.5 cm. long, glabrous or glandular- 
puberulent outside, the tube 4-7 mm. thick, expanding into a shallowly 5-lobed limb 2.5-3 
em. broad; stamens equaling the perianth or usually slightly exserted; fruit elliptic-oblong in 
outline, narrowed at both ends, 8-10 mm. long, dark-brown to nearly black, smooth, 
glabrous. 
TYPE Locality: About the forks of the Platte River, Colorado. 
DistTRiBvuTION: In dry, chiefly sandy soil, southern Utah and Colorado to northern Chihuahua 
and western Texas. 
a Pray ie ir naaaal Bot. Mag. #l. 6266; Contr. U. S. Nat. Herb. 13: pl. 77; Clements, Rocky Mt. 
DOUBTFUL SPECIES 
QuamocLipion ANGULATUM Choisy, in DC. Prodr. 137: 429. 1849. (Nyctago angulata 
DC.; Choisy, in DC. Prodr. 13?: 429, as synonym. 1849.) Described from Mexico. The 
identity of the plant is problematical (see Standley, Contr. U. S. Nat. Herb. 13: 410. 1911). 
23. HESPERONIA Standley, Contr. U. S. Nat. Herb. 12: 360. 
1909. 
Perennial herbs or shrubs, with repeatedly dichotomous stems, the nodes usually swollen, 
the plants usually pubescent and viscid. Leaves opposite, petiolate, or the upper sessile, 
the blades broad, succulent, entire or undulate. Flowers involucrate, axillary; involucre 
1-flowered, campanulate, only slightly accrescent in age, green, 5-lobed, the lobes slightly 
unequal, imbricate; perianth funnelform-campanulate, longer than the involucre, constricted 
above the ovary, the limb 5-lobed, induplicate-plicate, deciduous, the lobes retuse, red or 
white. Stamens 5, unequal; filaments capillary, incurved, connate at the base into a fleshy 
cup; anthers didymous. Ovary ellipsoid or globose; style filiform; stigma capitate, papillose. 
Anthocarp coriaceous, globose or oval, smooth, glabrous, often with 10 light-colored vertical 
lines. Seed with the testa adherent to the pericarp; embryo uncinate, the cotyledons en- 
closing the scanty endosperm; radicle elongate, descending. 
Type species, Mirabilis californica A. Gray. 
Fruit globose or depressed-globose, the diameter equaling or greater than the 
length. 1. H. Heimerlii. 
Fruit oval or oblong to suborbicular in outline, the length greater than the 
diameter. 
Involucral lobes lanceolate or oblong-lanceolate, longer than the tube. 
Fruit 7~8 mm. Jong; involucres 9 mm. long. 2. H. oligantha. 
Fruit 4-5 mm. long. 
Involucres 7-9 mm. long; leaf-blades mostly 1.5-2.5 em. long; plants 
usually slender, conspicuously viscid only about the inflorescence. 3. H. polyphylla. 
Involucres 10-13 mm. long; leaf-blades mostly 3-4 cm. long; plants . 
very stout, very viscid throughout. 4. H. tenuiloba. 
Involucral lobes broadly ovate to ovate-oblong, equaling or usually shorter 
than the tube. . : 
Plants glabrous throughout, or with a few appressed hairs upon the 
involucres. 5. H. laevis. 
Plants conspicuously pubescent. : ; ; 
Pubescence scabrous, of very short conic hairs. 6. H. cedrosensis. 
Pubescence chiefly of slender villous hairs, never of short conic hairs. 
Stems villous nearly or quite throughout; blades of the lower . 
leaves mostly rounded at the apex; perianth white or pinkish. 7. H. Bigelovii. 
Stems villous only about the inflorescence if at all. 
Perianth rose-colored or purplish-red; blades of the lower 
leaves obtuse or acutish at the apex, most of them narrowed 
to the apex and never rounded. 8. H. californica. 
Perianth white or rarely pinkish; blades of the lower leaves 
usually all broadly rounded at the apex. 9. H. retrorsa. 
1. Hesperonia Heimerlii Standley, Contr. U. S. Nat. Herb. 13: 412. 
1911. 
Stems stout, the older ones white, much swollen at the nodes, much branched, the branches 
ascending or spreading, glabrous below, glandular-puberulent above, the internodes rather 
