Brassica napus plant5 (14371510205)

Description:

Description: Canola growing in the Merriwa to Denman region in crop and by roadside. Flowerheads infested with aphids. Introduced, cool-season, annual or biennial herb to 1.5 m tall, usually with a strong taproot. Stems are erect and scarcely branched. Leaves are grey-green. Lower leaves are stalked, lyrate-pinnatifid and 5–20 cm long; nerves sparingly bristly. Upper leaves are stem-clasping, sessile and oblong-lanceolate. Flowerheads are racemes. Flowers are bright yellow, with 4 petals and 6 stamens. Fruit are siliquas, obliquely erect, 5–10 cm long, obscurely 4-angled, with a 5–20 mm long, tapering beak. Flowering is from winter to spring. Date: 29 May 2014, 11:30. Source: Brassica napus plant5. Author: Harry Rose from South West Rocks, Australia.