Part 3, 1918] ALLIONTACEAE 235 
(white ?), glandular-puberulent outside; stamens equaling the perianth; fruit oval in outline, 
5 mm. long, 3.5 mm. in diameter, rounded at both ends, dark-brown, smooth. 
TYPE LocaLIty: San Bernardino County, California. 
_DisrRipution: In dry, sandy soil, Colorado Desert of southern California and northern Lower 
California. 
5. Hesperonia laevis (Benth.) Standley, Contr. U. S. Nat. Herb. 
12: 363. 1909. 
Oxybaphus laevis Benth. Bot. Voy. Sulph. 44. 1844, 
Mirabilis laevis Curran, Proc. Calif. Acad. II. 1: 235. 1889. 
Quamoclidion laeve Rydb. Bull. Torrey Club 29: 687. 1902. 
Plants erect, suffrutescent below, much branched, glabrous throughout, or a few minute 
appressed hairs present on the involucres, the branches slender, with long internodes, whitish; 
petioles of the lower leaves almost as long as the blades, the blades of the uppermost leaves 
subsessile; leaf-blades orbicular-ovate or deltoid-ovate, 1.5-3.5 cm. long, 1-2 cm. wide, sub- 
cordate at the base, acutish or subobtuse at the apex, slightly sinuate, succulent, inconspicu- 
ously veined; peduncles very short, few; involucre 10 mm. long, the lobes about equaling the 
tube, ovate, acute; perianth about 15 mm. long: stamens exserted. 
TYPE LocaLity: Magdalena Bay, Lower California. 
DISTRIBUTION: Vicinity of the type locality. 
6. Hesperonia cedrosensis Standley, Contr. U. S. Nat. Herb. 
12: 362. 1912. 
Mirabilis cedrosensis Jepson, Fl. Calif. 459. 1914. 
Plants erect or ascending, 3-6 dm. high, suffrutescent or fruticose below, much branched, 
the branches slender, with long or short internodes, white or stramineous, glabrous below, 
scabrous above and sometimes viscid; petioles stout or slender, 3-13 mm. long, the upper- 
most blades subsessile; leaf-blades broadly deltoid, rhombic-ovate, or orbicular-ovate, 1.2-3 
em, long, 0.8-2.5 cm. wide, subcordate to rounded at the base, obtuse to acute at the apex, 
thick and succulent, scabrous with short conic retrorse hairs, or glabrate in age, the veins 
nearly obsolete, the blades of the upper leaves smaller, narrower, and more acute than those 
of the lower ones; peduncles few, 2 mm. long ot wanting; involucre campanulate, 5-7 mm. 
long, densely covered with short viscid hairs, the lobes shorter than the tube, ovate or ovate- 
triangular, obtuse or acutish; perianth 12 mm. long, purplish-red, glabrous or sparsely puberu- 
lent: stamens about equaling the perianth; fruit subglobose but evidently longer than thick, 
4.5-5 mm. long, smooth, dark-brown, with 10 light-colored vertical lines. 
Type LocaLiry: Cedros Island, Lower California. 
DISTRIBUTION: San Clemente Island, California; Cedros and San Benito islands and the western 
coast of Lower California. 
7. Hesperonia Bigelovii (A. Gray) Standley. 
Mirabilis Bigelovii A. Gray, Proc. Am. Acad. 21: 413. 1886. 
Mirabilis aspere Greene, Erythea 4: 67. 1896. 
Mirabilis californica aspera Parish, Muhlenbergia 3: 125. 1907. 
Hesperonia aspera Standley, Contr. U. S. Nat. Herb. 12: 362. 1909. 
Hesperonia aspera villosa Standley, Contr. U. 8. Nat. Herb. 12: 363, 1909. 
Hesperonia glutinosa gracilis Standley, Contr. U. S. Nat. Herb. 12: 365, 1909. 
Hesperonia limosa gracilis Standley, Mublenbergia 5: 104. 1909. 
Plants erect. or ascending, 3-6 dm. high, suffrutescent at the base, much branched, the 
branches usually stout, whitish, densely villous with slender whitish hairs and somewhat viscid, 
rarely glabrate below in age; petioles stout, 5-12 mm. long, or those of the upper leaves shorter; 
blades of the lower leaves reniform-ovate, broadly rhombic-ovate, or suborbicular, 2-4 em. 
long, 1.3-3.7 cin. wide, broadly rounded at the apex, or rarely narrowed to an obtuse apex, 
subcordate to rounded at the base, the blades of the upper leaves smaller, broadly oblong- 
ovate to deltoid-ovate, often acute, all copiously villous with slender whitish hairs and slightly 
viscid, or glabrate in age, thick and succulent, the veins nearly obsolete; peduncles numerous, 
axillary and glomerate at the ends of the branches, 5 mm. long or shorter; involucre campanu- 
