Boeberoides grandiflora (DC.) J. L. Strother

Clomenocoma grandiflora (Moc. & Sesse) Rydberg
Dyssodia grandiflora DC. Prodr. 5: 640. 1836.
Boebera grandiflora Moc. & Sesse; DC. Prodr. 5: 640, as synonym. 1836.
A tall herb; stem 3-10 dm. high, glabrous or sparingly hirsutulous, angled, striate; leaves
opposite, practically simple, the lateral segments being reduced to small subulate lobes or
bristles on the short petiole; blades ovate, 3-5 cm. long, acute or short-acuminate, serrate,
sparingly hirsute above, glabrate except the midrib beneath; heads solitary at the ends
of the branches; peduncles 1-2 dm. long, with a few small bracts; involucre hemispheric, 12
mm. high, 20-25 mm. broad; principal bracts 12-15, oblong or elliptic, obtuse, with 2-4 irregular
rows of glands, erose-dentate at the apex; accessory bracts 4-8, oblong to oblong-ovate, about
half as long, acute; ligules fully 1 cm. long, elliptic, rather stronglyveined ; disk-corollas strongly
veined, 12 mm. long; tube glandular at the junction with the trumpet-shaped throat; lobes
linear-lanceolate, 2.5 mm. long; achenes 2.5 mm. long, pilose; squamellae about 10, 8 mm.
long, each dissected into 8-11 slender bristles.
Type locality: Mexico.
Distribution: Southern Mexico and Guatemala.

Gymnolaena seleri (Rob. & Greenm.) Rydberg
Dyssodia Seleri Rob. & Greenm. Proc. Am. Acad. 35: 314. 1900.
A stoutish herb; branches terete, striate, puberulent, at length glabrate,; leaves simple, opposite or subopposite, oblong, shortly acuminate, rounded or more often cordate at the sessile base, sharply and rather finely serrate, 6-13 cm. long, 2.5-4 cm. wide, dotted with numerous round glands; peduncles terminal, more or less clavate-thickened towards the summit; involucre 3 cm. broad, puberulent, glandless; accessory bracts distinct, unequal, lanceolate, acute, herbaceous at least near the apex; principal bracts united two thirds their length, their tips acuminate; ray-flowers 12-20; ligules (in dry state) brown, more than 1 cm. long; disk-corollas nearly 1.5 cm. long; achenes sericeous-villous; pappus 1 cm. long, of about 20 squamellae, each dissected into several bristles.
Type locality: Near Xochicato, Cuernavaca, Morelos. Distribution: Morelos.