WILD FLOWERS OF NEW YORK 91 



late, 2 to 6 inches long, nearly sessile, acuminate at both ends, conspicuously 

 dotted, usually with a triangular or lunar dark blotch near the center; ocreae 

 cylindric, fringed with short bristles. Flowers in dense, erect, ovoid or 

 oblong racemes, one-half to 2 inches long, pink to dark purple; stamens 

 usually six. 



Native of Europe but naturalized and often an abundant weed in 

 waste places throughout North America, except in the extreme north. 



Arrow-leaved Tearthumb 



Tracaiilon sagittutit})! (Linnaeus) Small 



Plate 4Sa 



Stems slender, weak, annual, decumbent, or climbing over other plants 

 by the numerous sharp, recurved prickles which arm its four prominent 

 angles. Leaves lanceolate-sagittate or oblong-sagittate, i to 3 inches long, 

 pointed at the apex, slightly rotigh margined, the lower leaves petioled, 

 upper ones sessile or nearly so, prickly on the petioles and beneath on the 

 midribs; ocreae oblique, not ciliate. Flowers in terminal heads or racemes, 

 rose-colored or greenish; stamens usually eight in number; style three- 

 parted. 



In wet soil, Newfoundland and Nova Scotia to the Northwest Territory, 

 south to Florida and Kansas. Flowering from July to September. 



Halberd-leaved Tearthumb 



Tracaidon ari folium (Linnaeus) Rafinesque 



Plate 48b 



Stems angled, reclining, 2 to 6 feet long from a perennial root, armed 

 with recurved prickles. Leaves broadly hastate, long petioled, i to 8 inches 

 long, pubescent or glabrous beneath, the apex and basal lobes sharp pointed; 

 petioles and larger nerves prickly; peduncles and pedicels glandular; ocreae 

 oblique, fringed at the summit with short bristles and at the base with 

 slender prickles. Flowers in terminal and axillary heads or racemes, rose- 

 colored or greenish, four parted. Stamens six; style two-parted. 



