112 



SELECTED "WESTERN FLORA 



5. A. specidsa, Torr. 



Stout, 1-2^ ft. high; stem, leaves, and calyx finely canescent-tomentose ; 

 leaves thick, oval to oblong, very slightly cordate; corolla purplish-white, the 

 hood sUghtly longer than the lobes; horn short, incurved; folUoles densely 

 woolly and somewhat spiny, erect on recurved pedicels. Moist places, Man.- 

 Alta. 



LXX. CONVOLVULACEJS (Mobning Glory Family). 



Twining herbs with alternate leaves, sometimes reduced, to scales, 

 and regular flowers. Sepals 5; corolla 5-lobed, often twisted in the 

 bud; stamens 5, on the tube of the corolla; ovary superior, 2-3- 

 celled. 



1. CONVOLVULUS. Bindweed. 



Calyx of 5 sepals often with a pair of bracts enclosing the flower in 

 bud ; corolla funnel-form, obscurely 6-lobed ; stamens 5, included, in- 

 serted on the corolla tube ; ovary 2-celled, or somewhat 4-celled by 

 partial partitions between the seeds, or more rarely 1-oelled. Twin-, 

 ing perennial herbs with large flowers and entire or lobed leaves. 



1. C. sepium, L. 



Fig. 72. — Cuscuta 

 Cronovii. 



Stems glabrous, twining extensively; leaves 

 halberd-shaped; flowers showy, white or pink. 

 Moist soil, especially along streams, Man.-Alta. 



2. CtJSCUTA. DoDDEE. 



Calyx 5-parted; corolla bell-shaped with 

 a spreading 5-eleft border; stamens as many 

 as the corolla lobes and alternate with them, 

 each with a scale-Hke or fringed appendage 

 at the base; ovary 2-cell6d with 2 ovules in 

 each cell; styles 2, usually distinct. Annuals 

 with yellow stems, and leaves reduced to 

 minute scales, rooting in the ground, but later 

 becoming entirely parasitic on the plant 

 around which they twine. 



1. C. Grondvil, Willd. 



Corolla lobes obtuse, spreading, shorter than or 

 equaUing the tube. Wet shady places twining 

 around other plants, very often on the Solidagos, 

 Man. 



