Avena fatua |
Avena occidentalis |
|
---|---|---|
wild oat |
|
|
Habit | Annuals, the culms to 1 m. tall, hollow. | |
Leaves | Sheaths open; ligules 3-6 mm. long, obtuse to acute, puberulent; blades 3-10 mm. broad, scabrous, often with a few long hairs. |
|
Flowers | Inflorescence a large, open panicle, the spikelets pendulous; spikelets usually 3-flowered, the rachilla readily disarticulating between the florets, strongly bearded; glumes membranous, the first 7-nerved, the second 9-nerved; lemmas densely bearded on the callus, the upper portion greenish, but the tip membranous and acutely bilobed for 1 mm.; first 2 florets with twisted, strongly-bent awns up to 4 cm. long; lodicules 2 mm. long. |
|
Fruits | Utricle |
|
Avena fatua |
Avena occidentalis |
|
Flowering time | May-September | |
Habitat | Fields, roadsides, wastelots, and other disturbed areas. | |
Distribution | Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
|
|
Origin | Introduced from Eurasia | |
Conservation status | Not of concern | |
Sibling taxa | ||
Web links |
|