Difference between revisions of "Alyssum murale"
Descr. Icon. Pl. Hung. 1: 5. 1799.
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|elevation=1500-1800 m | |elevation=1500-1800 m | ||
|distribution=Alta.;B.C.;Ont.;Que.;Colo.;Oreg.;Utah;Europe;sw Asia. | |distribution=Alta.;B.C.;Ont.;Que.;Colo.;Oreg.;Utah;Europe;sw Asia. | ||
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|publication title=Descr. Icon. Pl. Hung. | |publication title=Descr. Icon. Pl. Hung. | ||
|publication year=1799 | |publication year=1799 | ||
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| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_324.xml |
|tribe=Brassicaceae tribe Alysseae | |tribe=Brassicaceae tribe Alysseae | ||
|genus=Alyssum | |genus=Alyssum | ||
Latest revision as of 22:32, 5 November 2020
Perennials; (cespitose, sometimes caudex woody); canescent or not, trichomes stellate, 5–20-rayed. Stems often several from caudex (sterile shoots absent or few), usually erect or ascending, (2.5–)3–6(–7) dm. Cauline leaves subsessile; blade narrowly oblanceolate to linear, (0.5–)0.7–2.5(–3) cm × 1–5(–8) mm (gradually smaller distally), base cuneate to attenuate, apex obtuse to subacute, (surfaces often more grayish abaxially than adaxially). (Racemes corymbose, in panicles terminating each stem.) Fruiting pedicels divaricate-ascending, straight or slightly curved distally, slender, (2–)2.5–6(–8) mm, trichomes uniformly stellate. Flowers: sepals oblong, 1.2–2 × 0.4–0.7 mm, stellate-pubescent; petals yellow, spatulate, 2.5–3.5 × 0.5–1 mm, base attenuate, apex often obtuse or rounded, glabrous abaxially; filaments: median pairs broadly winged, apically 1-toothed, lateral pair with lanceolate or narrowly oblong basal appendage, apically subacute, 1.5–2.5 mm; anthers oblong, 0.2–0.3 mm. Fruits broadly elliptic to orbicular, 3.5–5 × 2.5–5 mm, apex obtuse to rounded; valves not inflated, flattened and slightly undulate, stellate-pubescent; ovules 1 per ovary; style (slender) 1–2 mm, sparsely pubescent. Seeds suborbicular to broadly ovoid, compressed, 3–3.8 × 2–3.2 mm, margins winged, wing 0.5–0.9 mm wide. 2n = 16, 32.
Phenology: Flowering May–Jul.
Habitat: Waste areas, roadsides
Elevation: 1500-1800 m
Distribution
Introduced; Alta., B.C., Ont., Que., Colo., Oreg., Utah, Europe, sw Asia.
Discussion
Selected References
None.