Difference between revisions of "Helianthus arizonensis"
Brittonia 15: 266, fig. 2. 1963.
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|elevation=1200–2100 m | |elevation=1200–2100 m | ||
|distribution=Ariz.;N.Mex. | |distribution=Ariz.;N.Mex. | ||
| − | |discussion=<p>Helianthus arizonensis is morphologically similar to the polyploid H. ciliaris; H. arizonensis is diploid (or triploid) and has entirely yellow disc corollas. It is known from relatively few sites.</p> | + | |discussion=<p><i>Helianthus arizonensis</i> is morphologically similar to the polyploid <i>H. ciliaris</i>; <i>H. arizonensis</i> is diploid (or triploid) and has entirely yellow disc corollas. It is known from relatively few sites.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1963 | |publication year=1963 | ||
|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_410.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | ||
Revision as of 15:34, 18 September 2019
Perennials, 20–30 cm (roots creeping). Stems erect to ascending, glabrous (glaucous). Leaves cauline; opposite; sessile; blades (bluish green) lanceolate, 2–7 × 0.5–1.3 cm, bases cuneate, margins entire (undulate), faces glabrous (glaucous). Heads 1–7. Peduncles 2–7.5 cm. Involucres hemispheric, 9–18 mm diam. Phyllaries 16–19, lance-ovate, 3.5–7 × 2–2.8 mm, (margins ciliate) apices acute, abaxial faces glabrate, sparingly gland-dotted. Paleae 5.5–6.5 mm, 3-toothed (apices acute, gland-dotted). Ray florets 10–14; laminae 7–9 mm. Disc florets 30+; corollas 3–3.5 mm, lobes yellow; anthers reddish brown, appendages brownish. Cypselae 2.8–3.2 mm, glabrous; pappi of 2 deltate, erose scales 1–1.7 mm. 2n = 34, 51.
Phenology: Flowering summer–fall.
Habitat: Open pine woodlands
Elevation: 1200–2100 m
Discussion
Helianthus arizonensis is morphologically similar to the polyploid H. ciliaris; H. arizonensis is diploid (or triploid) and has entirely yellow disc corollas. It is known from relatively few sites.
Selected References
None.