Difference between revisions of "Madia exigua"
Proc. Amer. Acad. Arts 8: 391. 1872.
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|elevation=30–2500 m | |elevation=30–2500 m | ||
|distribution=B.C.;Calif.;Idaho;Mont.;Nev.;Oreg.;Wash.;Mexico (Baja California). | |distribution=B.C.;Calif.;Idaho;Mont.;Nev.;Oreg.;Wash.;Mexico (Baja California). | ||
| − | |discussion=<p>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.</p> | + | |discussion=<p><i>Madia exigua</i> occurs in seasonally dry situations in much of western North America outside the warm deserts. Morphologically, <i>M. exigua</i> is somewhat similar to <i>Hemizonella minima</i>, which (unlike <i>M. exigua</i>) has subumbellate arrays of heads and obcompressed, sparsely hairy ray cypselae.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1872 | |publication year=1872 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V21_745.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Madiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Madiinae | ||
Revision as of 15:37, 18 September 2019
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.
Phenology: Flowering Apr–Jul.
Habitat: Openings in grasslands, meadows, shrublands, woodlands, and forests, disturbed sites, often sandy, gravelly, or clayey soils, sometimes serpentine
Elevation: 30–2500 m
Distribution
B.C., Calif., Idaho, Mont., Nev., Oreg., Wash., Mexico (Baja California).
Discussion
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.
Selected References
None.