MARYLAND GEOLOGICAL SURVEY 875 



material is from the upper Magothy at Grove Point in Cecil County, 

 from which it takes its name. 



Occurrence. MAGOTHY FORMATION. Grove Point, Cecil County. 



Collection. U. S. National Museum. 



Genus ARALIA Linne 



[Sp. PL, 1753, p. 273] 



ARALIA GROENLANDICA Heer 



Aralia groenlandica Heer, 1882, Fl. Foss. Arct, Bd. vi, Ab. ii, p. 84, pi. 



xxxviii, fig. 3; pi. xxxix, fig. 1; pi. xlvi, figs. 16, 17. 

 Aralia groenlandica Lesquereux, 1892, Mon. U. S. Geol. Survey, vol. xvii, p. 



134, pi. liv, figs. 1-3. 

 Aralia groenlandica Newberry, 1896, Mon. U. S. Geol. Survey, vol. xxvi, p. 



116, pi. xxviii, fig. 4. 

 Aralia groenlandica Berry, 1903, Bull. N. Y. Bot. Garden, vol. iii, p. 94, pi. 



xlv, fig. 4. 

 Aralia groenlandica Hollick, 1907, Mon. U. S. Geol. Survey, vol. 1, p. 98, pi. 



xxxvii, figs. 3-6. 



Aralia groenlandica Berry, 1911, Bull. 3, Geol. Survey of New Jersey, p. 199. 

 Aralia groenlandica Berry, 1911, Bull. Torrey Bot. Club, vol. xxxviii, p. 408. 



Description. " A. foliis magnis, coriaceis, laevigatis, basi rotundatis, 

 lobis subsequalibus, lobo medio sinu lato, rotundato, separate." Heer, 

 1882. 



This species is very poorly defined, both Heer and Lesquereux including 

 in it leaves showing a quite considerable range of variability. They are 

 all coriaceous, trilobate leaves of considerable size with long and short 

 petioles. Length 6 cm. to 10 cm. Width 7 cm. to 12 cm. Lobes ovate, 

 pointed or rounded, with open rounded sinuses, the lateral lobes showing a 

 tendency to become sublobate below. Primaries slender, camptodrome. 

 Lesquereux makes " five nerved from the top of the petiole," a character of 

 this species as it is in all the specimens which he figures and in one or 

 two of Heer's figures. These extra laterals are much more slender than 

 are the regular primaries and are not constant unless the species be con- 



N 



sidered composite. 



The Coastal Plain leaves referred to this species by Newberry, Hollick, 

 and the writer are as a rule somewhat smaller in size, with narrower 

 lobes. This species is infrequent in the Earitan, and the leaves referred 



57 



