252 CONTRIBUTIONS FROM 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 l. V. scutellata. 



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



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. ehamaedrys. 



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



4. V. officinalis. 

 I- lowers 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, the 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 . hederaefolia. 



Leaves with numerous small teeth, longer than broad. 

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

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



10. V. polita. 



1. Veronica scutellata I, Marsh speedwell 

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



Amer.; also in Eur. and Asia. 



2. Veronica americana Sehwein. American brooklime. 

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



Widely distributed in N. Amer. 



3. Veronica ehamaedrys L. Germander speedwell. 

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



eastern N. Amer. 



4. Veronica officinalis L. rv™»™^- „„„ 



LOMMOJv 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. 

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



also in Eur. and Asia. 



6 Veronica serpyllifolia I, . Thyme-leap speedwell. 



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

 also in Eur. and Asia. 



7. Veronica arvensis L. rw« c,™„„~ 



r . ,, tORN 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 I, IvY . LEAp 8PEEDWELL 

 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 toumefortii Gmel. 



Lawns or waste ground; occasional. March-Apr. Native of Eur and Asia- 

 adventive in many parts of N. Amer. ( V. buxbaumii Ten.; V. byzantvna B. S. P.) 



