193 PRACTICAL BOTANT. 



477. Calyx prismatic, 5-angled. Corolla-tube long. 

 Leaves lanceolate, oblong, or kidney-shaped. Flowers violet, 

 purple, or yellow, on solitary, axillary peduncles. 



Mimulus. 

 Calyx not prismatic, 5-parted 478 



478. Corolla with the middle lobe of the lower, 3-cleft 

 lip saccate, the sac enclosing the declined stamens and style. 

 Flowers in umbel-like clusters, in the axils of the upper 

 leaves. Colliusia. 



Corolla with the lower lip not saccate. Flowers 

 not clustered, in the axils. 479 



479. Calyx equally 5-parted. Leaves many-parted into 

 linear -wedge-shaped divisions. The small, solitary, greenish- 

 white flowers on axillary, 2-bractleted peduncles.- 



Conobea multifida, Beuth. 



Calyx unequally 5-parted, or 2-lipped, the upper lip 



broadest. Leaves entire, many-nerved, or nerveless, obovate, 



or roundish, usually clasping. Flowers solitary, axillary, 



blue. (466) Herpestis. 



480. Corolla purple. Leaves linear or lanceolate, entire. 



338 

 Corolla yellow. Leaves pinnatifid 336 



481. (452.) Stamens rarely 4; the upper pair shorter, or 



rudimentary 482 



Stamens always 4, perfect 483 



483. Corolla pale blue ; upper lip entire, lower 3-lobed. 

 Flowers in dense, axillary, or nearly terminal verticils. * 



(443) Blephilia. 

 Corolla yellow; upper lip of 4, very short, almost 

 equal lobes ; lower lip long, fringed. Flowers in a long, ter- 

 minal, leafless raceme, or panicle. 



(444) CoUinsonia Canadensis, L. 



483. Upper or inner pair of stamens longer, than the 



lower, outer. None of the filaments aiDpendiculate at the 



base 484 



Upper or inner pair of stamens shorter, than the 

 lower (or in Phlomis — see 506 — often longer, with their fila- 

 ments appendiculate at the base) 488 



