852 



SCROPHULARIACEAE 



Gerardia 



50 



Map 1856 



Gerardia tenuifolia Vahl, var typica 



50 

 Map 1857 

 Gerardia lenuifoha 

 var. macrophylla Benth 



Gerardia tenuifolia var parviflora Nutt. 



habitats are moist, sandy soil on interdunal flats, in marshes, and springy 

 places, wet prairies, and, in the southern part of the state, in hard, white 

 clay soil in wet, open sweet gum woods and fallow fields. 

 Mass. to Minn., southw. to Fla. and Tex. 



2. Gerardia paupercula (Gray) Britt. var. typica Pennell. (Agalinis 

 paupercula (Gray) Britt.) Map 1854. Infrequent in the lake area where 

 it is found on the low borders of lakes or on interdunal flats. It grows in 

 moist, sandy or gravelly places and on marshy shores. 



N. B. to Pa. and Minn. 



2a. Gerardia paupercula var. borealis (Pennell) Pennell. (Proc. Acad. 

 Nat. Sci. Philadelphia 81: 159. 1929.) Map 1855. The variety is less 

 frequent than the typical form and is found in similar habitats. 



Que. to Minn., chiefly in the St. Lawrence Valley and in the Upper 

 Mississippi Valley. 



3. Gerardia tenuifolia Vahl var. typica Pennell. (Agalinis tenuifolia 

 (Vahl) Raf.) Map 1856. This species is probably found throughout the state 

 although it may not be present in the dune area. Infrequent in the northern 

 counties and frequent in the southern counties. With the exception of an 

 intermediate form all of my specimens were found on white and black 

 and white oak slopes and on chestnut oak ridges. 



The extreme variability of this species has led authors to divide it into 

 species and varieties. The well known botanist, E. L. Greene, found a very 

 wideleaf form near Ridgeville, Indiana, which he described as a new 

 species. The forms seem to intergrade and are so perplexing that I have 

 copied the section of Pennell's key to this species and its varieties and I 

 have indicated my specimens on the maps as he has named them. 



Maine to Mich, and Mo., southw. to Ga. and La. 



3a. Gerardia tenuifolia var. macrophylla Benth. (Agalinis Besseyana 

 Britt.) Map 1857. This variety is a very common form of the species 

 and is somewhat frequent throughout the state. It is found in both dry 



