Cirsium vulgare bull thistle Asteraceae CIVU*; Bx, pb, wv (Yost et al. 1991); NY (DeCandido 2001); Q, cu (Greller 1977, 1979, 1985), j (Stalter and Lamont. 2002); K, p; R, cl, cs; pr, sv, ty, wp;

   

Cirsium vulgare.commons.wikipedia.org

Cirsium vulgare.commons.wikipedia.org. (Accessed 5/2014).

Cirsium vulgare is a biennial herb, to 50-150 cm tall, very hairy, stem spiny-winged from extended leaf bases, deeply taprooted. 

Leaves alternate, narrow, about 15 cm long, 5 cm wide but very variable, very spiny with irregular spine-tipped, toothed lobes, both sides hairy, first years leaves in an overwintering rosette. 

Flowers purple, all tubular, to 4 cm long, bracteate base of head 2.5-4 cm long to 4 cm wide, urn-shaped, bracts numerous, overlapping, spine-tipped, self-fertile (autogamous), (Mulligan and Kevan 1973); blooming June-Oct., flowers visited by bees and hummingbirds (Martin et al. 1951). 

Fruit dry 1-seeded achenes about 0.4 cm long, yellow-brown, black streaked, oblong, smooth (Levine 1995), white plumed, wind dispersed; winter plant pale tan, receptacle flat, densely bristly surrounded by spiny bracts of flower head. Seeds eaten by finches and other birds (Martin et al. 1951). 

Wetland status: FACU-. 

Frequency in NYC: Occasional. 

Origin: Eurasia. 

Habitat: Open fields, roadsides, edges. Prefers rich, moist soil (Uva et al. 1997).