Field Guide to Noxious Weeds and Other Selected Invasive Plants of British Columbia

australis) PROVINCIAL NOXIOUS BUR CHERVIL (Anthriscus caucalis) • Annual or biennial herb from a taproot; 40 cm to 90 cm tall; stems are hollow, branched, and hairy near the base; leaves are alternate, fern-like, coarsely hairy and reduced in size towards the top of the stem; flowers are small and white with 5 petals that are borne in umbrella-like clusters at the top of stems • Reproduces by seed. [...] australis) • Perennial grass growing 1 m to 3 m tall; stems are stiff, smooth, round, hollow, un-branched, erect, and purplish in colour; leaves are 20 cm to 40 cm long, alternate up the stem and are often twisted at the base so that they appear flag-like on one side; flowers are purplish in colour and arranged densely along the stem in plume-like clusters • Reproduces by seed and rhizomes • Very. [...] Awns are twisted and bent at right angles when mature Base of leaf blades are slightly hairy • Annual grass growing from 0.3 m to 1 m tall; stems are hollow and erect; leaves of seedlings twist counterclockwise when viewed from above; seeds are yellow to black with a bent, twisted bristle (awn) and a circular scar (sucker mouth) at the base • Reproduces by seed • Found growing in cultivated and fa. [...] 55 REGIONAL NOXIOUS HOARY CRESS (Cardaria spp.) Heart-shaped seedpods Upper leaves clasping the stem • Creeping rooted perennial growing from 0.1 m to 0.6 m tall; lower leaves are stalked and hairy while upper leaves clasp the stem and are usually hairless; flowers are white, numerous, and arranged in a cluster at the top of the plant giving rise to its other common name of “white-top” • Reproduce. [...] • Upright, taprooted, evergreen shrub growing from 1 m to 3 m in height; stems are ridged, woody, green to brownish-green and prominently 5-angled; upper leaves are simple and unstalked; lower leaves are stalked and comprised of 3 oval leaflets; flowers are pea-like and bright yellow (sometimes with red markings in the middle); seedpods are flat, brown to black in colour with fine hairs on the mar.