Xanthium ambrosioides Hook. & Arn. APNI* 
Description: Herb 1 m high, stems very finely pubescent; stems with rigid, 3-pronged spines c. 8–20 mm long at base of leaves.
Leaves lanceolate, 2–4 cm long, 3–10 mm wide, divided into linear segments, surfaces grey, very finely pubescent, lamina with 3 prominent veins; petiole 5–10 cm long.
Heads inconspicuous. Burrs ellipsoid, 4–8 mm long, with long fine hooked spines, c. 2 mm long, sometimes with a short terminal spine.
Flowering: summer–autumn.
Distribution and occurrence: Weed of pastureland, naturalized in the Jerilderie area. Native of S Amer.
NSW subdivisions: *SWP
Similar to the more widely spreadX. spinosum..
Text by L. Murray
Taxon concept: Flora of NSW 3 (1992)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
|
