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Chile tarplant, Chile tarweed, Chilean tarplant, Chilean tarweed, coast tarweed, coastal tarweed

plumpseed madia, tarweed

Habit Plants (0.3–)35–100(–240) cm, self-compatible (heads not showy). Plants (10–)20–55 cm, self-compatible (heads not showy).
Stems

hirsute and glandular-pubescent, glands yellowish, purple, or black, lateral branches rarely surpassing main stems.

hirsute, distally glandular-pubescent, glands yellowish, purple, or black, lateral branches rarely surpassing main stems.

Leaf

blades broadly lanceolate to linear-oblong or linear, 2–18 cm × 3–18(–29) mm.

blades linear, 2–10 cm × 2–7 mm.

Involucres

ovoid to urceolate, 6–16 mm.

globose or depressed-globose, 6–10 mm.

Ray florets

(5–)8–13;

corollas greenish yellow or sometimes purplish red abaxially or throughout, laminae 1.5–4 mm.

3–8;

corollas greenish yellow, laminae 3–4.5 mm.

Disc florets

11–14, bisexual, fertile;

corollas 2–5 mm, pubescent;

anthers ± dark purple.

3–8, bisexual, fertile;

corollas 3.5–4 mm, pubescent;

anthers ± dark purple.

Phyllaries

hirsute and glandular-pubescent, glands yellowish, purple, or black, apices erect or ± reflexed, flat.

hirsute and glandular-pubescent, glands yellowish, purple, or black, apices erect or ± reflexed, flat.

Heads

in usually crowded, paniculiform, racemiform, or spiciform arrays.

in open, racemiform or paniculiform arrays.

Disc cypselae

similar.

similar.

Ray cypselae

black or brown, sometimes mottled, dull, compressed, beakless.

black or purple, glossy, ± terete, beakless.

Paleae

mostly persistent, connate 1/2+ their lengths.

mostly persistent, connate 1/4–1/2+ their lengths.

2n

= 32.

= 32.

Madia sativa

Madia anomala

Phenology Flowering May–Oct. Flowering Apr–Jun.
Habitat Grasslands, openings in shrublands and woods, disturbed sites, stream banks, roadsides Open, often grassy slopes in woodlands and chaparral
Elevation 0–1000 m (0–3300 ft) 0–500 m (0–1600 ft)
Distribution
from FNA
CA; OR; WA; BC; South America (Argentina, Chile) [Pacific Islands (Hawaii, probably introduced)]
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

In North America, Madia sativa occurs on the Pacific Coast from California to British Columbia, sporadically in coastal ranges, and rarely eastward. Reports of M. sativa from Ontario and Quebec and from Alaska, Connecticut, Georgia, Idaho, Indiana, Iowa, Maine, Maryland, Massachusetts, New York, North Carolina, Pennsylvania, Vermont, and Wisconsin are putative waifs or misidentified M. glomerata. Molecular data and greenhouse studies have indicated that plants referable to M. capitata and M. sativa in California are not distinct (B. G. Baldwin, unpubl.). Sampled populations of M. sativa (including M. capitata) from California are somewhat divergent in DNA sequences from sampled Chilean populations, in apparent conflict with earlier suggestions that M. sativa was recently introduced to North America from South America by Europeans (Baldwin, unpubl.). Madia sativa has been cultivated for seed-oil in South America, Europe, Africa, and Asia Minor (E. Zardini 1992).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Madia anomala occurs locally in the North Coast Ranges, San Francisco Bay area, and Sutter Buttes (southern Sacramento Valley), sometimes with the morphologically similar M. gracilis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 21, p. 308. FNA vol. 21, p. 307.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Madiinae > Madia Asteraceae > tribe Heliantheae > subtribe Madiinae > Madia
Sibling taxa
M. anomala, M. citrigracilis, M. citriodora, M. elegans, M. exigua, M. glomerata, M. gracilis, M. radiata, M. subspicata
M. citrigracilis, M. citriodora, M. elegans, M. exigua, M. glomerata, M. gracilis, M. radiata, M. sativa, M. subspicata
Synonyms M. capitata
Name authority Molina: Sag. Stor. Nat. Chili, 136. (1782) Greene: Bull. Calif. Acad. Sci. 1: 91. (1885)
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