236 NORTH AMERICAN FLORA [VolLuME 21 
late, 5-6 mm. long, densely villous or short-villous and viscid, the lobes shorter than the tube, 
oblong-ovate or broadly ovate, obtuse or acutish; perianth 8-12 mm. long, white or some- 
times pinkish, sparsely short-villous and viscid outside; stamens slightly exserted or occa- 
sionally included; fruit subglobose but evidently longer than thick, 5 mm. long, dark-olive or 
greenish-brown, marked by 10 lighter vertical lines. 
Type Locatiry: Grand Canyon of the Colorado, below Peach Spring, Arizona. 
_DistR1pution: In dry, mostly sandy soil, southern and western Arizona, and in southeastern 
California, from Inyo County to San Diego County. 
8. Hesperonia californica (A. Gray) Standley, Contr. U. S. Nax. 
Herb. 12: 364. 1909. 
Oxybaphus glabrifolius crassifolius Choisy, in DC. Prodr. 13?: 431. 1849. 
Oxybephus glabrifolius Torr. Pacif. R. R. Rep. 4: 131. 1857. Not O. glabrifolius Vahi, 1806. 
Mirabilis californica A. Gray, in Torr. Bot. Mex. Bound. Surv. 173. 1859. 
Oxybaphus californicus Benth. & Hook. Gen. Pl. 3: 4. 1880. 
Hesperonia californica microphylla Standley, Contr. U. S. Nat. Herb. 12: 365. 1909. 
Plants erect or decumbent, suffrutescent or fruticose below, much branched, the branches 
2-10 dm. long, slender or stout, whitish, with short or elongate internodes, glabrous below, 
puberulent and viscid above and often villous but usually only sparsely so; petioles slender 
or stout, 12 mm. long or shorter, the uppermost blades often subsessile; plades of the lower 
leaves subreniform to rounded-ovate or deltoid-ovate, 1.5—4.5 em. long, 1-3.5 cm. wide, cordate 
to truncate at the base, narrowed to the obtuse or acute apex, the blades of the upper leaves 
smaller, narrower, mostly acute or attenuate, all the blades green, thick and succulent, short- 
villous or puberulent and viscid when young, glabrate in age; peduncles numerous, often 
crowded at the ends of the branches, 3 mm. long or shorter; involucre campanulate, 5-8 mm. 
long, densely short-villous and viscid, the lobes shorter than the tube, ovate or ovate-oblong, 
obtuse or acutish; perianth 10-14 mm. long, purplish-red, sparsely short-villous outside; 
stamens equaling or slightly exceeding the perianth; fruit broadly oval in outline, 5 mm. 
long, smooth, dark-brown. 
Tyre LocaLity: Southern California. 
DIstRIBUTION: California, from the Santa Lucia Mountains to San Diego County, chiefly near 
the coast, and on the adjacent islands; northern Lower California. 
ILLUSTRATION: Bot. Mex. Bound. Surv. #1. 48. 
9. Hesperonia retrorsa (Heller) Standley. 
Mirabilis glutinosa A. Nelson, Proc. Biol. Soc. Wash” 17: 92. 1904. Not M. glutinosa Kuntze. 
1898 
M ivabilis retrorsa Heller, Muhlenbergia 2: 193. 1906. 
Hesperonia glutinosa Standley, Contr. U.S. Nat. Herb. 12: 365. 1909. 
Hesperonia glutinosa retrorsa Standley, Contr. U. S. Nat. Herb. 12: 365. 1909. 
Mirabilis limosa A. Nelson, Bot. Gaz. 47: 426. 1909. 
Hesperonia limosa Standley, Muhlenbergia 5: 104. 1909. 
Hesperonia limosa retrorsa Standley, Muhlenbergia 5: 104. 1909. 
Mirabilis californica glutinosa Jepson, Fl. Calif. 458. 1914. 
Mirabilis californica retrorsa Jepson, Fl. Calif. 458. 1914. 
Plants erect or ascending, suffrutescent at the base, much branched, the branches 3-6 
dm. long, slender or stout, with usually elongate internodes, whitish, glabrous below, puberu- 
lent above with mostly retrorse hairs, usually slightly viscid and often sparsely short-villous; 
petioles stout, 5-12 mm. long, the uppermost blades often subsessile; blades of the lower 
leaves ovate-orbicular, broadly deltoid-ovate, or suborbicular, 1.5—3.5 cm. long, 1-3 em. wide, 
often as broad as long, subcordate or rounded at the base, usually broadly rounded at the 
apex but rarely narrowed and acutish, the blades of the upper leaves slightly smaller and 
narrower, obtuse to acute at the apex, all the blades green, thick and succulent, inconspicu- 
ously veined, scaberulous or puberulent with mostly retrorse hairs, glabrate in age; peduncles 
numerous, axillary and crowded at the ends of the branches, those in the lower axils some- 
times 14 mm. long, the upper ones much shorter, often nearly obsolete; involucre campanulate, 
5-7 mm. long, densely viscid-puberulent or short-villous, the lobes shorter than the tube, 
ovate to ovate-oblong, obtuse or acutish; perianth 10-12 mm. long, white, sparsely viscid- 
puberulent outside or glabrate; stamens equaling the perianth or slightly exserted; fruit 
