Madia sativa |
Madia anomala |
|
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Chile tarplant, Chile tarweed, Chilean tarplant, Chilean tarweed, coast tarweed, coastal tarweed |
plumpseed madia, tarweed |
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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 |
CA; OR; WA; BC; South America (Argentina, Chile) [Pacific Islands (Hawaii, probably introduced)]
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CA |
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 | ||
Synonyms | M. capitata | |
Name authority | Molina: Sag. Stor. Nat. Chili, 136. (1782) | Greene: Bull. Calif. Acad. Sci. 1: 91. (1885) |
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