166 PRACTICAL BOTANY. 



Corolla decidedly irregular, often 2-lij)ped, and 

 sometimes also spurred ,434 



333. Stamens fewer than the corolla-lobes (rarely with 



an additional rudimentary one) 323 



Stamens as many as the corolla- or calyx-lobes . ; 341 

 Stamens more numerous than the corolla-seg- 

 ments 418 



333. I. Fertile stamen 1. A leafless, dull purplish, 

 branching herb, parasitic on the roots of the beech, flower- 

 bearing its whole length. Stamens 4, still usually all but one 

 imperfect. Only the lower flowers fertile. 



Epipheg^s Virginiana, Bart. (800). 

 II. Stamens 2 324 



III. Stamens 4 (3 of them usually imperfect in Epi- 

 phegus ; see 323 I.) 330 



IV. Stamens 5, one of them rudimentary and 

 sterile (sometimes only 2 perfect stamens). Calyx 5-cleft, 2- 

 to 3-bracteolate at the base. Corolla bell-shaped, unequally 

 5-lobed (or somewhat 2-lipped), gibbous at the base. A 

 strong-scented herb, usually decumbent. Leaves cordate, 

 nearly orbicular. Flowers large, racemed. Pods with an in- 

 curved beak, which splits into 2 hooked horns, 4-celled. 



Martyuia proboscidea, Glox (450). 



334. Herbs .'. 325 



Trees and shrubs 327 



335. Ovary deeply 4-lobed, the style rising from between 

 the lobes. Corolla 4-cleft. Leaves opposite, oblong, or oval- 

 lanceolate, serrate, or sinuate-toothed. Flowers in dense axil- 

 lary whorls, white. Stem 4-angled. Lycopus. 



Ovary not 4-lobed 326 



336. Corolla wheel-shaped, 4-, rarely 5-parted. Pod 

 sometimes notched at the apex, 2-celled. Leaves opposite, or 

 whorled. Flowers blue, flesh-color, or white. Veronica. 



Corolla slightly bell-shaped, somewhat irregularly 

 4-cleft. Pod 2 (rarely 3-) celled, 2-grooved (rarely 3-lobed). 

 Radical leaves round-ovate ; stem-leaves bract-like, clasping. 

 Flowers greenish-yellow, in a spiked raceme. 



Synthyris Houghtouiaua, Benth. (446). 



