1919.] NATURAL SCIENCES OF PHILADELPHIA. 261 



Petals exceeding the narrowly ovate sepals. Capsule-lobes 

 acutish, the most distal point of each near the lateral 

 margin. 3. T^ persica. 



Pedicels shorter than sepals or bracts. Sepals linear to narrowly 

 ovate. Capsule flattened. Seeds many, less than 1 mm. 

 long, flat, smooth or nearly so. Leaves sessile (or the lower 

 petioled), scarcely palmate, alternate only through the in- 

 florescence. 

 Perennial. Repent, with ascending stems. Leaves oval or 

 ovate, obscurely crenate. Inflorescence spike-like, re- 

 stricted to the distal portion of the stem. Sepals ovate. 

 Corolla white, with blue lines on posterior side. Cap- 

 sule retuse or shallowly notched, glandular-pubescent. 



4. V. serpylli folia. 

 Annuals. Erect, much branched beloAv. Most leaf-axils flower- 

 bearing. Sepals lanceolate to linear. Capsule deeply 

 notched. 



Lower stem-leaves ovate, crenate-serrate, the lowermost 

 frequently petioled. Corolla deep violet-blue. Cap- 

 sule pubescent with slightly gland-tipped hairs. Plant 

 pubescent with glandless hairs. 



5. V. arvensis. 



Lower stem-leaves oblanceolate, entire or distally remotely 

 toothed, all sessile. Corolla whitish throughout. Cap- 

 sule glabrous. Plant glabrous or with, short gland-tipped 

 hairs. 

 Plant glabrous. 6. V. peregrina. 



Plant pubescent with gland-tipped hairs. 



6a. V. peregrina xalapensis. 

 Flow^ers all in axillary small-bracted racemes. Leaves opposite 

 throughout. Perennials. 

 Capsule glandular-pubescent, strongly two-lobed, longer than the 

 sepals. Stems, pedicels, leaves and sepals pubescent. Leaves 

 oval, crenate-serrate, narrowed to a petiolar base. Exten- 

 sively repent, at apex ascending. Plant of dry soil. 



7. V. officinalis. 

 Capsule glabrous, scarcely or not two-lobed, equaling the sepals. 

 Plant glabrous or with scattered gland-tipped hairs. Leaves 

 oblong-ovate to broadly lanceolate, obscurely crenate-serrate. 

 Ascending or wholly erect. Aquatics. 

 Stem distally, rhachis and pedicels glabrous. Leaves oblong- 

 ovate, all petioled, mostly emersed. Racemes usually 10- 

 25 flowered. Plant emersed. 8. V. americana. 

 Stem distally, rachis and pedicels sparsely pubescent with 

 glands, borne upon jointed stalks. Leaves lanceolate, 

 clasping. Racemes usually 25-50 flowered. Plant nearly 

 submersed. 9. V. glandifera. 



1. Veronica hederaefolia L. 



Waste places, mostly near cities, occasional. Naturalized from 

 Eurasia. 



