Difference between revisions of "Avena occidentalis"
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|distribution=Calif. | |distribution=Calif. | ||
| − | |discussion=<p>Avena occidentalis is native to the Canary Islands, coastal North Africa, and Saudi Arabia; it is now established in western North America, from California to northern Mexico. It is often confused with A. fatua, but differs in its longer, narrower spikelets, greater number of florets, and the heart-shaped disarticulation scars of the distal florets.</p> | + | |discussion=<p><i>Avena occidentalis</i> is native to the Canary Islands, coastal North Africa, and Saudi Arabia; it is now established in western North America, from California to northern Mexico. It is often confused with <i>A. fatua</i>, but differs in its longer, narrower spikelets, greater number of florets, and the heart-shaped disarticulation scars of the distal florets.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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name=Avena occidentalis | name=Avena occidentalis | ||
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|authority=Durieu | |authority=Durieu | ||
|rank=species | |rank=species | ||
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|family=Poaceae | |family=Poaceae | ||
|illustrator=Cindy Roché | |illustrator=Cindy Roché | ||
| + | |illustration copyright=Utah State University | ||
|distribution=Calif. | |distribution=Calif. | ||
|reference=None | |reference=None | ||
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|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_1045.xml |
|subfamily=Poaceae subfam. Pooideae | |subfamily=Poaceae subfam. Pooideae | ||
|tribe=Poaceae tribe Poeae | |tribe=Poaceae tribe Poeae | ||
Latest revision as of 16:21, 11 May 2021
Plants annual. Culms 50-80 cm, erect. Sheaths glabrous or sparsely pubescent, hairs 0.5-1 mm, sometimes confined to the margins; ligules of the lower leaves 3-5 mm, those of the upper leaves 1.5-2.5 mm, acute; blades 12-25 cm long, 5-11 mm wide. Panicles 15-26 cm. Spikelets 30-40 mm, with 3-4(5) florets; disarticulation beneath each floret; disarticulation scars of the lower florets in a spikelet round to elliptic, those of the third and fourth florets heart-shaped. Glumes subequal, 28-40 mm, 7-9-veined; calluses bearded, hairs 3-5 mm; lemmas 14-26 mm, usually densely strigose below midlength, sometimes sparsely strigose or glabrous, veins not extending beyond the apices, apices bifid, teeth sometimes shortly aristate, awns arising at midlength; lodicules without lobes on the wing; anthers 2-3.2 mm. 2n = 42.
Discussion
Avena occidentalis is native to the Canary Islands, coastal North Africa, and Saudi Arabia; it is now established in western North America, from California to northern Mexico. It is often confused with A. fatua, but differs in its longer, narrower spikelets, greater number of florets, and the heart-shaped disarticulation scars of the distal florets.
Selected References
None.