KEY. 177 



dry, 3- to 5-celled. Corolla-limb nearly entire. Flowers pale 

 blue, solitary, on axillary and terminal i^eduncles. 



Nicandra physaloides, Gaertn. 



39^. Leafless, parasitic herbs, yellowish or reddish, with 

 thread-like stems, beset with minute scales, twining around 

 other plants. Corolla globular-urn-shaped, bell-shaped, or 

 somewhat tubular, the spreading limb 5- (rarely 4-) cleft. 

 Flowers small, commonly w^hite, in clustered, cymose glome- 

 rules. (344) Cuscuta. 

 Plants with green leaves 393 



393. Leaves alternate (sometimes crowded) 394 



Leaves opposite, at least most of them (sometimes 



crowded) 405 



394. Anther-cells opening by terminal pores, or by a 

 transverse line , 395 



Anther-cells opening lengthwise 396 



39^. Prostrate, creeping herbs, w' ith crowded, evergreen 

 leaves. Anthers opening by a transverse line, awn-pointed 

 at the base. Flowers solitary and sessile, very numerous, 

 white, or rose-color. Pyxidanthera barbulata, Mx. 



Erect shrubs. Flowers showy, rose-color, pink, or 

 whitish, often glandular-viscid, often fragrant. Stamens 

 long, exserted ; anthers opening by 2 terminal pores. Corolla 

 funnel-form, 5-lobed, slightly ii-regular ; the lobes spreading. 

 Calyx often minute. Pod 5-celled, 5-valved, many-seeded. 

 Shrubs. Azalea. 



396. Leaves pinnate; leaflets 7-11. Ovary 3-celled. 

 Style 3-lobed. Flowers few, in corymbs, blue, nodding. 

 Filaments hairy-appendiculate at tlie base. 



Folemonium reptans,L. 



Leaves simple 397 



397. All the 5 filaments, or the 3 npper ones, woolly. 

 Corolla wheel-shaped, 5-lobed; the lobes rounded. Pod 

 globular, 2-celled, the placentae in the axis. Flowers in large, 

 terminal racemes, ephemeral. Leaves sessile, or decurrent. 



Verbascum. 



Filaments not w^oolly. Corolla often plaited. ..398 



