1906] House,— Violets of the District of Columbia 121 



sagittaia are found near together. Extremely diverse in leaf-outline 

 and many of the intermediate forms are highly fertile, producing 

 normal capsules and potent seeds. 



Viola fimbriatula X villosa hyb. nov. Leaves oblong-ovate, 

 strongly but rather distantly crenate, cordate, obtuse, sparingly 

 pubescent on the petioles and under surface of the leaf-blades, strongly 

 pubescent above with rigid, whitish hairs peculiar to V. villosa, deep- 

 green but faintly mottled with whitish by the darker green regions of 

 the principal veins, the abortive capsules on spreading peduncles. — 

 Takoma Park, Aug. 3, 1904 (No. 143a, type). 



Viola palmata X villosa Brainerd, Rhodora 8: 56. 1906.— 

 Four-mile-run, Va., Jos. H. Painter, Aug. 5, 1904 (No. 865); H. D. 

 House, Aug. 9, 1904 (No. 182) ; Darlecarlia Reservoir, May 23, 1905 

 (No. 804); Glen Echo, May 25, 1905 (No. 823); Rock Creek Park, 

 May 13, 1905 (No. 712); Fairfax Co., Va., June 29, 1905 (No. 1079). 



Viola papilionacea X sagittata Brainerd, Rhodora 8: 54. 

 1906. — This was referred to by me as V. conjugens Greene, in a 

 previous article on the violets of New Jersey (Bull. Torrey Club 32 : 

 256. 1905), and a subsequent comparison of the New Jersey speci- 

 mens with the type of V. conjugens, shows that they are the same. 

 As V. conjugens was described from Anne Arundel Co., Md., it comes 

 within the range of this paper. 



Viola papilionacea X villosa hyb. nov. Mature leaf-blades 

 oblong-ovate to suborbicular, obtuse, obscurely crenate toward the 

 apex, more conspicuously serrate at the base, cordate, deep-green, 

 nearly glabrous, especially beneath but the blades more or less pubes- 

 cent above with whitish hairs, capsules abortive on spreading ped- 

 uncles. Growing with the two species, V. papilionacea and V. villosa 

 at Darlecarlia Reservoir, June 17, 1905 (No. 1029, type). 



Viola Stoneana X villosa hyb. nov. Growing in dense, matted 

 clumps, the leaves at flowering time spreading on petioles 5 to 10 cm. 

 long, pubescent above with the silvery whitish hairs characteristic 

 of V. villosa and even more strongly ciliate on the margins than V. 

 Stoneana, nearly glabrous beneath and somewhat shining; size of 

 plant and lobing of the mature leaf-blades exactly intermediate 

 between the two species and growing with them. Flowers inter- 

 mediate in color between the blue of V. Stoneana and the deep purple 

 of V. villosa. (Plate 72.)— Hyattsville, May 5, 1905 (No. 685, 

 type), June 4, 1905 (No. 935a). 



