208 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



2. Viola conspersa Reichenb. Dog violet 

 Low ground or shaded hillsides; Rock Creek Park, and between Cabin John and 



Rockville; rare. Apr.-May. Eastern N. Amer. 



The species has been reported from our region under the incorrect names of V, 

 labradorica and V. canina sylvestris. 



3. Viola striata Ait. Cream violet. 

 Low woods, usually in alluvial soil,, along the Potomac; sometimes cultivated and 



escaping. Apr-May. Northern states, south to Ga. 

 A tuft of flowering plants is shown in plate 25B. 



4. Viola rafinesquii Greene. Field pansy. 

 Fields and open woods; common. Apr.-May. Eastern U. S. (V. tenella Muhl.; 



V. tricolor arvensis of Ward's Flora.) 

 Viola tricolor L., the pansy, sometimes escapes to waste ground. 



5. Viola lanceolata L. Lance-leaf violet. 

 In bogs; frequent about Hyattsville, and in a few localities elsewhere. Apr.-May. 



Eastern U. S. 



6. Viola primulifolia L. Primrose violet. 

 Low wet ground, chiefly on the Coastal Plain; common. Apr.-May. Eastern 



N. Amer. 



7. Viola pallens (Banks) Brainerd. 



In bog below Great Falls, Va. Northern states, south to S. C. 



8. Viola blanda Willd. White violet. 

 On rocks along the Patuxent at Laurel; Paint Branch. Apr.-May. Eastern 



N. Amer. 



Viola odorata L., the English violet, was reported from Accotink by Holm. Native 

 of Eur.; often cultivated and sometimes escaping. 



9. Viola pedata L. Pansy violet. 

 Dry open slopes or in thin woods; common. Apr.-May. Eastern U. S. ( V. pedata 



bicolor Pursh.) 



Known also as bird-foot violet. In the typical form of the species the two upper 

 petals are dark violet, the lower ones pale lilac-purple. In another form all the petals 

 are lilac-purple. 



10. Viola brittoniana Pollard. Britton violet. 

 Moist sandy soil; vicinity of Hyattsville, Bladensburg, and Riverdale. Apr.-May. 



Me. to Va. 



This is one of our handsomest violets; the large flowers are borne on remarkably 

 long peduncles. 

 Viola brittoniana X cucullata House. 



About Riverdale and Hyattsville. ( V. notabilis House.) This is a plant of very 

 distinctive appearance. The leaves are broadly ovate- triangular, coarsely and 

 irregularly but shallowly toothed or lobed. The cleistogamous flowers are borne on 

 very slender peduncles longer than the leaves. 

 Viola brittoniana X emarginata House. 



Hyattsville, according to House. The leaves in outline resemble those of V. 

 brittoniana, but they are much less deeply lobed. 

 Viola brittoniana X sagittata House. 



Near Riverdale. The leaf outline strongly suggests V. sagittata, but the leaves are 

 deeply laciniate-lobed near the base. 



11. Viola emarginata (Nutt.) Le Conte. 



Dry woods and hillsides, chiefly on the Coastal Plain; common. Apr.-May, 

 N. Y. to Ga. 



