250 THE FLORA. 



8 L. Canaden'se. Canada T. Leaves linear, obtuse. Flowers small, blue, loosely 

 rucemed. Stem erect. 



8 L. Elat'ine, Pointed T. Leaves ovate-hastate. Flowers sitiall, yellow, and pur- 

 ple. Stem prostrate. 



3. GRATI'OLA. Hedge-hyssop. 



Calyx nearly equally 5-parted. Corolla upper lip entire or slightly 

 2-cleft, lower 3-cleft. Fertile stamens 2, mostly with 3 sterile filaments. 

 Pod 2-celled, 4-valved, many-seeded. — Low herbs with opposite leaves. 

 Peduncles axillary, 1 -flowered, usually with 2 bracts near the calyx. 

 June-August. 

 § Flowers on peduncles. Plants weak, smooth, or viscid. . . .a 



§ Flowers sessile or nearly so. Plants rigid, bristly-hairy. S 8, 9 



a Sterile filaments thread-like, tipped with a small head....b 

 a Sterile filaments none, or very minute and pointed.. . .5-7 



b Leaves entire or nearly so. Plants smooth 1,2 



b Leaves toothed. Plants generally viscid-downy. Flowers white. ...3, 4 



1 Gr. officina'lis. Officinal H. Stem erect. Leaves clasping. Fls. whitish. S. 



2 Gr. au'rea. Gulden II. Stem ascending, branched. Leaves sessile. Flowers 



yellow, showy. 

 8 Gr. visco'sa. Viscid IT. Leaves ovate-lanceolate. Sepals and bracts lanceolate. S. 

 4 Gr. ramo'sa. Branching H. Lvs. linear-lance. Bracts minute. Sepals linear. S. 



5 Gr. sphaerocar'pa. Bound-fruited H. Peduncles not longer than calyx. Pod 



globular. W. [calyx. S. 



6 G. Florida 'na. Florida H. Peduncles long. Corolla four times longer than the 



7 G-. Virginia'na. Virginian II. Peduncles long. Cor. twice longer than calyx. 



8 G. pilo'sa. Hairy H. Leaves ovate, toothed. Corolla scarce longer than calyx. S. 



9 G. subula'ta. Aui-lv. H. Leaves narrow, entire. Cor. thrice longer than calyx. S. 



4. YERON'ICA. Speedwell. 

 Calyx 4-parted. Corolla with a wheel-shaped, spreading, 4-cleft bor- 

 der, the lower segment smallest. Stamens 2, inserted into the tube, pro- 

 jecting. Sterile filaments 0. Pod flattened, mostly obtuse or notched at 

 the apex, 2-celled, few or many-seeded. — Mostly herbs, with opposite 

 leaves. Flowers small, solitary, axillary, or racemed, blue, flesh-color, or 

 white. Marchr-September . 



§ Erect, tall (U-4f.). Flowers in dense terminal spikes 1, 2 



§ Low, weak (3-12^). Leaves opposite. Corolla tube very short a 



a Racemes mostly opposite, from the axils of the leaves, sky-blue 3, 4 



a Eacemes mostly alternate, from the axils of the leaves, light-colored 5, 6 



a Kacemes terminal, or the flowers axillary and not racemed b 



