small tarweeds

Member of tarweeds and allies (tribe Madieae)
sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

Assisted with commentary from Ryan O’Dell: “I look at the combination of stem color (Hemizonella is usually a light purple color), involucre shape (Madia exigua is usually a nice, uniform urn), and growth form (Hemizonella is usually short: < 10 cm and decumbent).”

small tarweed
Madia exigua

stem up to 30+ cm, unknown color
disk flower glabrous
anthers yellow to ± brown
ray flower fruit compressed side-to-side or ± 3-angled in cross section with curved beak
sand or clay soils in open, grassy, or disturbed sites

See also the key to tarweeds (genus Madia).

opposite-leaved tarweed
Hemizonella minima

stem < 20 cm (often < 10 cm and decumbent), usually light purple in color
disk flower hairy
anthers yellow
ray flower fruit compressed front-to-back with straight beak
gravelly or rocky sites, generally open sites among meadows, scrub, or forest

1 observed taxon / 1 unobserved taxon / 1 key

Chris’s observations: 1 (research grade)

Locations:

Coal Creek OSP

Months:

Jun.: 1

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