Difference between revisions of "Achyrachaena"
Index Seminum (Bratislave) 1837: [3]. 1837.
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|title=Index Seminum (Bratislave) | |title=Index Seminum (Bratislave) | ||
| − | |place=1837: | + | |place=1837: [3]. 1837 |
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|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Madiinae;Achyrachaena | |hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Madiinae;Achyrachaena | ||
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Madiinae]]</div><div class="higher-taxon"><small>genus</small>[[Achyrachaena]]</div></div> | |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Madiinae]]</div><div class="higher-taxon"><small>genus</small>[[Achyrachaena]]</div></div> | ||
| − | |etymology= | + | |etymology=Greek achyron, scale, and Latin achaenium, fruit, alluding to cypselae |
|volume=Volume 21 | |volume=Volume 21 | ||
|mention_page=page 255 | |mention_page=page 255 | ||
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|family=Asteraceae | |family=Asteraceae | ||
|illustrator=Barbara Alongi | |illustrator=Barbara Alongi | ||
| + | |illustration copyright=Flora of North America Association | ||
|distribution=w North America;nw Mexico. | |distribution=w North America;nw Mexico. | ||
|reference=None | |reference=None | ||
|publication title=Index Seminum (Bratislave) | |publication title=Index Seminum (Bratislave) | ||
| − | |publication year= | + | |publication year=1837 |
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_635.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Madiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Madiinae | ||
Latest revision as of 20:13, 5 November 2020
Annuals, 4–62 cm. Stems erect, branched distally. Leaves mostly cauline; proximal opposite, distal alternate; ± sessile; blades linear, margins entire or toothed, faces hirsute or villous and (distal leaves) sparsely glandular-pubescent. Heads radiate, borne singly or in loose, ± corymbiform arrays. Peduncular bracts: pit-glands, tack-glands, and/or spines 0 at tips. Involucres ± campanulate to cylindric or ellipsoid, 3–12+ mm diam. Phyllaries 3–8 in 1 series (± lance-linear, herbaceous, each fully enveloping a ray ovary, abaxially hirsute or villous and sparsely glandular-pubescent or eglandular). Receptacles flat to convex (setulose), paleate (paleae falling, in 1 series between rays and disc, distinct). Ray florets 3–8, pistillate, fertile; corollas yellow, turning reddish (lobes ± parallel). Disc florets 4–35, bisexual and fertile; corollas yellow to reddish, tubes ± equaling narrowly funnelform throats, lobes 5, lance-deltate (anthers ± dark purple; styles glabrous proximal to branches). Ray cypselae (black) obcompressed, clavate (10-ribbed, straight, basal attachments centered, apices beakless, faces glabrous or ± scabrous); pappi 0. Disc cypselae (brown to black) similar to rays (± scabrous); pappi of 10 white, oblong scales (apices obtuse). x = 8.
Distribution
w North America, nw Mexico.
Discussion
Species 1.
Selected References
None.