Flora of Scotts Creek Watershed
Madia sativa - Coast Tarweed
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Family Name: Asteraceae
Common Names: Coast Tarweed, Chile Tarweed, Coastal Tarweed, Chilean Tarweed
Origin: Native to California
Habitat: Coastal grasslands, disturbed soils, open places. Below 950 m.
Life Form and Duration: Annual Herb, 0.2-2.4 m tall
Comments on overall growth: Upright growth, generally single stem, stout. Strong distinctive scent. Whole of plant covered with soft, very sticky, glandular hairs. Glands yellow to black. Form taller and more robust than other Madia species.
Foliage Description: Leaves crowded on stem, linear to lanceolate, covered with glandular hairs, lower leaves 2-15 cm long, upper leaves may be reduced.
Infloresence Description: Rounded flower heads in clusters at top of stem, greenish-yellow. About 8 ray flowers around outer edge, 11-14 ray flowers at center. Phyllaries of involucre densely glandular. Flower heads open completely only at night, during the day they are closed or partially collapsed.
Flowering Season: May-October
Fruit Type: Achene
Fruit Description: 2.5-5 mm, glabrous, black or dark brown.
Edibility: Oil from seeds is highly nutritious, Native Americans would store the seeds for eating in winter.
Common Associates: Hieracium albiflorum
Other Comments: Each species of Madia has its own unique scent.