Difference between revisions of "Lyonothamnus"
Proc. Amer. Acad. Arts 20: 291. 1885.
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|distribution=Calif. (Channel Islands). | |distribution=Calif. (Channel Islands). | ||
|discussion=<p>Species 1.</p><!-- | |discussion=<p>Species 1.</p><!-- | ||
| − | --><p>Taxonomically, Lyonothamnus has been moved about within Rosaceae; here it is placed as an isolated taxon within Amygdaloideae. It is known from Miocene fossils from California, Nevada, and Oregon (D. M. Erwin and H. E. Shorn 2000).</p> | + | --><p>Taxonomically, <i>Lyonothamnus</i> has been moved about within <i>Rosaceae</i>; here it is placed as an isolated taxon within Amygdaloideae. It is known from Miocene fossils from California, <i>Nevada</i>, and Oregon (D. M. Erwin and H. E. Shorn 2000).</p> |
|tables= | |tables= | ||
|references={{Treatment/Reference | |references={{Treatment/Reference | ||
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|publication year=1885 | |publication year=1885 | ||
|special status=Conservation concern;Endemic | |special status=Conservation concern;Endemic | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_568.xml |
|subfamily=Rosaceae subfam. Amygdaloideae | |subfamily=Rosaceae subfam. Amygdaloideae | ||
|tribe=Rosaceae tribe Lyonothamneae | |tribe=Rosaceae tribe Lyonothamneae | ||
Latest revision as of 22:57, 5 November 2020
Plants clonal, 50–100(–150) dm, herbage usually glabrous, glabrate, or tomentulose (glabrescent). Stems 1+; bark brown or gray; short shoots absent. Leaves tardily falling, cauline; stipules absent or lance-linear, margins entire; petiole present; blade simple (sometimes lobed), palmate, or pinnate, simple blades or leaflets elliptic, lance-linear, lanceolate, or oblong, 6–18 cm, leathery, leaflets 3–7, usually pinnately lobed, margins ± revolute, entire, crenulate, or serrate. Inflorescences terminal, 50–800+-flowered, compound corymbs or panicles; bracts present; bracteoles present. Pedicels present. Flowers produced after leaves, (5–)6–8 mm diam.; hypanthium 3–4(–5) mm (including sepals), exterior tomentulose, interior pilose; sepals 5, spreading, ovate to triangular; petals 5, white, obovate to orbiculate; stamens (12–)15+ in 1 series, shorter or longer than petals; carpels tomentulose. Fruits aggregated follicles, 2(–3), ± ovoid to lanceoloid, 3–4 mm (excluding styles), stipitate-glandular, dehiscent adaxially; hypanthium persistent; sepals persistent or tardily falling, ± spreading. Seeds 2–4+, ± ellipsoid to fusiform, firm, ends rounded or truncate, faces smooth or minutely papillate, seed coats tight. x = 9.
Distribution
Calif. (Channel Islands).
Discussion
Species 1.
Taxonomically, Lyonothamnus has been moved about within Rosaceae; here it is placed as an isolated taxon within Amygdaloideae. It is known from Miocene fossils from California, Nevada, and Oregon (D. M. Erwin and H. E. Shorn 2000).