MARYLAND GEOLOGICAL SURVEY 813 



Order SALICALES 

 Family SALICACEAE 



Genus SALIX Linne 

 [Sp. PL, 1753, p. 1015] 



SALIX FLEXUOSA Newberry 

 Plate LVII, Fig. 4 



Salix flexuosa Newberry, 1868, Later Ext. Floras, p. 21. 



Salix flexuosa Newberry, 1878, 111. Cret. and Tert. Plants, pi. i, fig. 4. 



Salix protewfolia linearifolia Lesquereux, 1892, Mon. U. S. Geol. Survey, 



vol. xvii, p. 49, pi. xliv, figs. 1-3. 

 Salix protewfolia flexuosa Lesquereux, 1892, Mon. U. S. Geol. Survey, vol. 



xvii, p. 50, pi. xliv, figs. 4, 5. 

 Salix prota'folia flexuosa Hollick, 1894, Bull. Torrey Bot. Club, vol. xxi, p. 



50, pi. clxxiv, fig. 5. 



Salix protetrfolia flexuosa Hollick, 1898, Ann. N. Y. Acad. Sci., vol. xi, p. 



59, pi. iv, fig. 5a. 

 Salix protewfolia flexuosa Berry, 1903, Bull. N. Y. Bot. Garden, vol. iii, p. 



67, pi. xlviii, fig. 12; pi. li, fig. 2. 

 Salix flexuosa Berry, 1906, Ann. Kept. State Geol. Survey of New Jersey 



for 1905, p. 145. 



Salix flexuosa Berry, 1906, Bull. Torrey Bot. Club, vol. xxxiii, p. 171. 

 Salix protevfolia linearifolia Hollick, 1907, Mon. U. S. Geol. Survey, vol. i, 



p. 52, pi. viii, fig. 12. 

 Salix protewfolia flexuosa Hollick, 1907, Mon. U. S. Geol. Survey, vol. 1, p. 



51, pi. viii, figs. 5, 6a; pi. xxxvii, fig. 8b. 



Salix flexuosa Berry, 1911, Bull. 3, Geol. Survey of New Jersey, p. 115. 

 Salix flexuosa Berry, 1914, Prof. Paper U. S. Geol. Survey, No. 84, pp. 32, 

 109, pi. vii, figs. 14-16; pi. xi, fig. 1. 



Description. Leaves narrow, linear-lanceolate in outline, equally 

 pointed at both ends, short petioled, ranging from 5 cm. to 10 cm. in 

 length, and from 8 mm. to 13 mm. in maximum width. Margins entire. 

 Midrib stout below, tapering above, often somewhat flexuous. Secondaries 

 more or less remote, about ten alternate pairs, branching from the midrib 

 at angles varying from 35 to 45, camptodrome, of fine caliber, often 

 obsolete. 



This species was described by Newberry from the Dakota group in 

 1868. Lesquereux subsequently made it one of the varieties of his Salix 

 protecefolia, although it is obviously entitled to independent specific rank. 

 It is of rare occurrence in the Eariten formation of New Jersey, where it 



