234 NORTH AMERICAN FLORA [VorumE 21 
long and the plants rather sparsely leafy; petioles stout, 3-15 mm. long; leaf-blades broadly 
deltoid-ovate to reniform-ovate, 1.5-3.5 cm. long, 1-3 cm. wide, obtuse to acutish at the 
apex, often apiculate, subcordate to truncate at the base, thick and fleshy, sparsely glandular- 
puberulent or scabrous, or in age glabrate, the blades of the upper leaves reduced, usually 
acute, short-petiolate; involucres numerous, short-pedunculate in the axils of the leaves or 
glomerate at the ends of the branches, 5-6 mm. long, densely viscid-puberulent, the lobes 
shorter than the tube, ovate, obtuse or acutish; perianth 10-12 mm. long, purplish-red, glandu- 
lar-puberulent outside; stamens equaling the perianth; fruit globose or slightly depressed, 
2.5-3 mm. long, dark-brown, obscurely rugulose. 
TYPE LocaLity: South end of Guadalupe Island, Lower California. 
DisTRIBUTION: Guadalupe Island, Lower California, 
2. Hesperonia oligantha Standley, Contr. U. S. Nat. Herb. 12: 363. 
1909. 
Plants fruticose at the base, much branched, the branches slender, finely and sparsely 
puberulent or glabrate, the internodes 2.5—-5 cm. long; petioles one third as long as the blades; 
leaf-blades deltoid-ovate, subcordate or rounded at the base, the lower ones rounded at the 
apex, the upper acute, sparsely puberulent; peduncles nearly as long as the involucres: in- 
volucre 9 mm. long, finely and densely viscid-puberulent, the lobes lance-triangular, acute, 
slightly longer than the tube; perianth about 12 mm. long; stamens long-exserted; fruit cylin- 
dric, acutish at both ends, 7-8 mm. long, almost 3 mm. thick, dark-brown, smooth. 
Type LocaLiry: Calmalli, Lower California. 
DistRiBuTION: Known only from the type locality. 
3. Hesperonia polyphylla Standley, Contr. U.S. Nat. Herb. 12: 364. 
1909. 
Plants erect, suffrutescent at the base, about 5 dm. high, much branched, the branches 
slender or stout, glabrous below, glandular-puberulent above and sparsely villous; petioles 
slender or stout, 3-20 mm. long, the uppermost blades either long-petiolate or subsessile; leaf- 
blades orbicular-ovate to deltoid or narrowly ovate-deltoid, 1.5-3.5 cm. long, 1.2-3 cm. wide, 
subcordate to rounded at the base, acute to attenyate at the apex, the younger ones 
puberulent or short-villous, glabrate in age, thick and fleshy, the lateral veins often prominent; 
peduncles 2 mm. long or longer, sometimes equaling the involucre; involucre narrowly cam- 
panulate, 7-9 mm. long, densely short-villous and viscid, the lobes slightly unequal, usually 
exceeding the tube, lance-triangular, acute or attenuate; perianth 12-20 mm. long, the limb 
nearly as broad, glandular-puberulent outside, purplish-red; stamens included or slightly ex- 
serted; fruit oval in outline, 4 mm. long, 3 mm. thick, smooth, dark-brown, with 10 light- 
colored vertical lines. 
Tyre LocaLiry: San Borga, Lower California. : 
Distrisution: Lower California and San Diego County, California. 
4. Hesperonia tenuiloba (S. Wats.) Standley, Contr. U. S. Nat. 
Herb. 12: 363. 1909. 
Mirabilis tenuiloba S. Wats. Proc. Am. Acad. 17: 375. 1882. 
Plants erect, very stout, 3-6 dm. high, suffrutescent at the base, much branched, the 
branches very stout, whitish, densely short-villous or puberulent and viscid, the internodes 
mostly longer than the leaves, the nodes swollen; petioles stout, 2-7 mm. long, the upper 
blades subsessile; leaf-blades orbicular-deltoid, broadly deltoid-ovate, or rhombic-ovate, 
2.5-4 em. long, 1.3-3.5 em. wide, subcordate or rounded at the base, acute or attenuate at 
the apex or the lower blades rarely obtuse, thick and fleshy, bright-green, densely viscid- 
puberulent, the upper leaves only slightly smaller than the lower; peduncles 2 mm. long or 
shorter, axillary, nearly concealed by the subtending leaves; involucre 10-13 mm. long, nar- 
rowly campanulate, densely short-villous and very viscid, the lobes slightly unequal, slightly 
exceeding the tube, narrowly lance-oblong, acute or attenuate; perianth 12-15 mm. long 
