252 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



14. VERONICA L. Speedwell. 



Flowers in racemes in the axils of the leaves. Plants perennial. 

 Plants glabrous or nearly so, growing in or near water; leaves more than twice as 

 long as broad; pedicels more than twice as long as the calyx. 



Leaves linear or nearly so; capsule longer than the calyx 1. V. scutellata. 



Leaves ovate or oblong; capsule shorter than the calyx 2. V. americana. 



Plants very hairy, growing usually in dry soil; leaves less than twice as long as 

 broad; pedicels little if at all longer than the calyx. 

 Leaves sessile; racemes loosely flowered; pedicels as long as the calyx. 



3. V. chamaedrys. 

 Leaves mostly short-petioled; racemes dense; pedicels shorter than the calyx. 



4. V. officinalis. 

 Flowers solitary in the axils of the leaves or in terminal spikes or racemes. 

 Leaves glabrous. 



Plants annual, mostly erect; flowers axillary; leaves oblong 5. V. peregrina. 



Plants perennial, the stems more or less creeping and rooting at the joints; flowers 



in terminal racemes; leaves oval or rounded 6. V. serpyllifolia. 



Leaves conspicuously hairy. Plants annual. 



Flowers nearly sessile, the pedicels much shorter than the leaves. .7. V. arvensis. 

 Flowers long-stalked, tlie pedicels nearly or quite as long as the leaves. 

 Leaves with 3 or 5 lobes or large teeth, often broader than long. Lobes of the 



capsule rounded 8. V. hederaefolla. 



Leaves with numerous small teeth, longer than broad. 



Corolla longer than the calyx; capsule broadly notched.. 9. V. tournefortii. 

 Corolla not longer than the calyx; capsule with a narrow notch at the apex. 



10. V. polita. 



1. Veronica scutellata L. Marsh speedwell. 

 Marshes along the upper Potomac; rare. July-Aug. Widely distributed in N. 



Amer.; also in Eur. and Asia. 



2. Veronica americana Schwein. American brooklime. 

 Along brooks or in pools; region of the upper Potomac; occasional. May-June. 



Widely distributed in N. Amer. 



3. Veronica chamaedrys L. Germander speedwell. 

 Department of Agriculture Grounds. Apr .-May. Native of Eur.; adventive in 



eastern N. Amer. 



4. Veronica officinalis L. Common speedwell. 

 Fields and woods; frequent. May-June. Widely distributed in eastern N. 



Amer. ; in part adventive from Eur. and Asia. 



6. Veronica peregrina L. Purslane speedwell. 



Fields and moist ground; common. Apr.-May. Widely distributed in N. Amer.; 

 also in Eur. and Asia. 



6. Veronica serpyllifolia L. Thyme-leaf speedwell. 

 Moist or wet woods; frequent. Apr.-May. Widely distributed in N. Amer.; 



also in Eur. and Asia. 



7. Veronica arvensis L. Corn speedwell. 

 Fields, woods, and waste ground ; common. March-May; sometimes flowering even 



earlier. Native of Eur. and Asia; widely naturalized in N. Amer. 



8. Veronica hederaefolia L. Ivy-leap speedwell. 

 Moist woods along the upper Potomac; locally abundant; occasional elsewhere. 



March-Apr. Native of Eur. and Asia; naturalized from N. Y. to S. C. 



9. Veronica tournefortii Gmel. 



Lawns or waste ground; occasional. March-Apr. Nati^-e of Eur. and Asia; 

 adventiv^e in many parts of N. Amer. ( F. baxbawnii Ten.; V. byzantina B. S. P.) 



