Comments
provided by eFloras
Madia exigua occurs in seasonally dry situations in much of western North America outside the warm deserts. Morphologically, M. exigua is somewhat similar to Hemizonella minima, which (unlike M. exigua) has subumbellate arrays of heads and obcompressed, sparsely hairy ray cypselae.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
provided by eFloras
Plants 1–30(–50) cm, self-compatible (heads not showy). Stems hirsute and glandular-pubescent, glands yellowish or purple, lateral branches seldom surpassing main stems. Leaf blades linear, 0.2–4 cm × 0.5–2 mm. Heads in open, corymbiform arrays (peduncles ± filiform). Involucres depressed-globose, 2.5–5 mm. Phyllaries ± hirsute and glandular-pubescent as well, glands golden yellow, apices ± erect, sulcate. Paleae mostly persistent, connate 1/2+ their lengths. Ray florets 1–8; corollas pale yellow, laminae 0.7–1 mm. Disc florets 1(–2), bisexual, fertile; corollas 1–1.8 mm, glabrous; anthers yellow to brownish. Ray cypselae black or brown, dull, compressed (strongly arcuate), beaked (beaks adaxially offset, curved). Disc cypselae obovoid, weakly compressed. 2n = 32.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
provided by eFloras
Sclerocarpus exigua Smith in A. Rees, Cycl. 31: Sclerocarpus no. 3. 1815
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Brief Summary
provided by EOL authors
Madia exigua is a wildflower that occurs in certain parts of western North America, from Baja California to British Columbia and east to Montana. Typical habitats are somewhat arid grasslands and open woodlands.
Also known as Small tarweed, this aromatic annual achieves a variable height of up to 50 centimeters. Stems are slender, simple below to branched throughout, more or less bristly or soft-hairy, especially below. The leaves are one to four centimeters long, strigose to somewhat bristly. The inflorescence heads manifest in open, generally flat-topped to panicle-like clusters. Flowers are pale yellow.
Madia exigua: Brief Summary
provided by wikipedia EN
Madia exigua is a species of flowering plant in the family Asteraceae known by the common names small tarweed and threadstem madia.
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