1903.] XATURAL SCIENCKS OF PHILADELPHIA. 699 



Explanation of Plates XXXI-XXXIX.^ 



Plate XXXI, Fig. i. — Viola villosa cordifolia. — a. Three leaves from early 

 flowering plants, b. Leaf from older plant, c. Two leaves from fruit- 

 ing plants. 

 Fig. ii. — Viola affinis. — a. Three leaves from early flowering plants, b. Two 

 older leaves, c. Two leaves from fruiting plants. 



Plate XXXII, Fig. i. — Viola papUionacea. — a. Two early leaves, b. Two later 



leaves, c. Two leaves from fruiting plant. 

 Fig. ii. — Viola cucullata. — a. Two early leaves, b. Later leaf. c. Leaf 



from plant in fruit. 

 Fig. iii. — Viola crenulata. — a. Three leaves from flowering plant, b. Leaf 



from fruiting plant. 



Plate XXXIII. — Viola palmala dilatata. — 1-2. Early leaves. 3-7. Older 

 leaves from flowering plants. 8-13. From fruiting plants. 



Plate XXXIV, Fig. i. — Viola pal mata. — a. Early leaf. b. Later leaf . c. From 

 fruiting plant, d. Late summer leaf. 

 Fig. ii. — Viola palmata angelhe. — a. Early leaf. b. Three leaves from fruit- 

 ing plant. 



Plate XXXV, Fig. i. — Viola briUoniana. — a. Three early leaves, b. Two older 

 leaves, c. Two leaves from fruiting plant. 

 Fig. ii. — Viola septernloba. — a. Three early leaves, b. Older leaf. c. Two 

 leaves from plant in fruit. 



Pl.-s-TE XXXVI, Fig. i. — Viola sagittata, Tinicum. Delaware county, Pennsyl- 

 vania. — a. Three early leaves, b. Two later leaves, c. Three leaves 

 from plants in fruit. 



Fig. ii. — Viola mgittata, broader-leaved plant, Tinicum, Delaware county, 

 Pennsylvania. — a. Early leaf. b. From fruiting plant. 



Fig. iii. — Viola saqiUata (approaching emarginata?) , Haddonfield, New Jer- 

 sey. — a. Early leaf. b. From fruiting plant. 



Fig. iv. — Viola emarginata. — a. Three early leaves, b. Two leaves from 

 fruiting plants. 



Fig. V. — ['iola emarginata. — Four leaves from late summer plants. 



Plate XXXVII, Fig. i. — Viola fimbriatula. — a. Two early leaves, b. Three 

 older leaves, c. Leaf from fruiting plant. 

 Fig. ii. — Viola fimbriatula. — From fruiting plant. 



Fig. iii. — ^'iola fimbriatula. — Exceptionally long petioled slender leaf. 

 Fig. iv. — Viola fimbriatula annectens. — a. Early leaf b. Fruiting leaf. 

 Fig. V. — Viola fimbriatula annectens. — From fruiting plant. 

 Fig. vi. — Viola fimbriatula annectens?. — Early leaf. 



Plate XXXVIII, Fig. i. — Viola sagittata. 

 Fig. ii. — Viola emarginata. 

 Fig. iii. — Viola papUionacea. 

 Fig. iv. — Viola cucullata. 

 Fig. V. — Viola fimbriatula. 



Plate XXXIX, Fig. i. — Viola palmata. 

 Fig. ii. — Viola briftoniana. 

 Fig. iii. — Viola septernloba. 

 Figs, iv and v. — Viola palmata dilatata. 



^ The drawings represent leaves that have been pressed flat, and no attempt 

 has been made to denote cucullation. 



