80 COMMON CANADIAN WILD PLANTS. 



long-petioled, pinnately 3-5-divided, the leaflets ovate-lanceolate, 

 pointed, serrate. 



2. B. conna'ta, Muhl. (SWAMP BEGGAR-TICKS.) Rays none. 

 Achenos flat, narrowly wedge-shaped, 2-4-awued, dilate with 

 minute bristles pointing downwards. Stem 1-2 feet high, smooth. 

 Leaves lanceolate, pointed, serrate, tapering and connate at the 

 base, the lowest often 3-parted and decurrent on the petiole. 

 In shallow water and low grounds. 



3. B. cer'nua, L. (SMALLER BUR-MARIGOLD.) Rays short, 

 pale yellow. Achenes flat, \vedge-obovate, 4- awn td, ciliate with 

 bristles pointbnj downwards. Stem nearly smooth, 5-10 inches 

 high. Leaves all simple, lanceolate, unequally serrate, hardly 

 connate. Heads nodding. Wet places. 



4. B. chrysanthemoi'des, Michx. (LARGER, BUR-MARIGOLD.) 

 Rays an inch lona t showy, golden yellow. Achenes wedge-shaped, 

 2-4-awned, bristly downwards. Stem smooth, 6-30 inches high, 

 erect or ascending. Leaves lanceolate, tapering at both ends, 

 connate, regularly serrate. Swamps and ditches. 



5. B. Beck'ii, Torr. (WATER MARIGOLD.) Aquatic. Stems 

 long and slender. Immersed leaves dissected into fine hair-like 

 divisions ; those out of water lanceolate, slightly connate, toothed. 

 Rays showy, golden yellow, larger than the involucre. Achenes 

 linear, bearing 4-6 wry tony awns barbed towards the apex. 

 Ponds and slow streams. 



37. HELIOP/SIS, Pers. Ox-Era. 



H. IcBVis, Pers. Stem smooth, slender, branching. Leaves 

 ovate-lanceolate^ acute, sharply serrate, on slender petioles. 

 Heads showy ; peduncles elongated. Dry open thickets; London 

 and westward. 



38. ACHIL.L.E'A, L. YAHBOW. 



A. millefo'lium, L. (MILFOIL.) Stems simple. Leaves dis- 

 sected into fine divisions. Cory ml) flat-topped. Rays only 4 or 

 5, short. Fields and along fences ; very common. 



39. POI/OI'NIA, L. LEAF-CUP. 



P. Canadensis, L. A coarse clammy-hairy herb. Lower 

 leaves opposite, petioled, piunatifid ; the upper alternate, angled 



