2. M. cæspitòsa, Nutt. Stem commonly leafy only at base; leaves narrowly oblanceolate to linear or the radical spatulate, obtuse.—Kan. to Tex.
60. GALINSÒGA, Ruiz & Pavon.
Heads several-flowered, radiate; rays 4–5, small, roundish, pistillate. Involucre of 4 or 5 ovate thin scales. Receptacle conical, with narrow chaff. Achenes angled; pappus of small oblong cut-fringed chaffy scales (sometimes wanting).—Annual herbs, with opposite triple-nerved thin leaves, and small heads; disk yellow; rays whitish. (Named for Galinsoga, a Spanish botanist.)
G. parviflòra, Cav. Smoothish (1° high); leaves ovate, acute, somewhat toothed; scales of the pappus 8–16.—Waste places, especially eastward; spreading from year to year. (Adv. from S. Amer.)
61. HYMENOPÁPPUS, L'Her.
Heads many-flowered; flowers all tubular and perfect, with large revolute corolla-lobes. Involucral scales 6–12, loose and broad, thin, the upper part petal-like (usually white). Receptacle small, naked. Achenes top-shaped, with a slender base, striate; pappus of 15–20 blunt scales in a single row, very thin (whence the name of the genus, from ὑμήν, membrane, and πάππος, pappus.)—Biennial or perennial herbs, with alternate mostly dissected leaves, and corymbed small heads of usually whitish flowers.
[*] Pappus of very small roundish nerveless scales.
1. H. scabiosæ̀us, L'Her. Somewhat flocculent-woolly when young, leafy to the top (1–3° high); leaves 1–2-pinnately parted into linear or oblong lobes; involucral scales roundish, mainly whitish.—Sandy barrens, Ill. and southward. May, June.
2. H. corymbòsus, Torr. & Gray. More slender, glabrate, naked above; scales obovate-oblong, petaloid at apex.—Neb. to Ark. and Tex.
[*][*] Pappus of conspicuous spatulate 1-nerved scales; involucre greener.