Maryland Geological Survey 471 



Occurrence. — Patapsco Formation. Fort Foote, Maryland; Aquia 

 Creek, near Widewater, Chinkapin Hollow (?), near Brooke, White 

 House Bluff, Mt. Vernon, 72-mile post, Virginia. 



Collections. — IT. S. National Museum, Johns Hopkins University. 



Sapindopsis magnifolia Fontaine 

 Plate LXXXVI; Plate LXXXVII, Fig. 1; Plate LXXXVIII 



i^apindopsis magnifolia Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 



1889, p. 297, pi. cli, figs. 2, 3; pi. clli, figs. 2, 3; pi. cliii, fig. 2; pi. cliv, 



figs. 1, 5; pi. civ, fig. 6. 

 ? Aralia dubia Font., 1890, Mon. U. S. Geol. Surv., vol. xv, 1889, p. 314, pi. 



clvii, figs. 1, 7 (non Schimper, 1874). 

 Sapindopsis oMusifolia Font., 1890, Mon. U. S. Geol. Surv., vol. xv, 1889, 



p. 301, pi. clvi, fig. 13; pi. clix, figs. 3-6. 

 Ficophyllum eucalyptoides Fontaine, 1890, Mon, U. S. Geol. Surv., vol. xv, 



1889, p. 294, pi. clxiv, figs. 1, 2. 

 Sapindopsis tenuinervis Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 



1889, p. 301, pi. cliii, fig. 1. 

 ? Aralia Fontainei Knowlton, 1898, Bull. U. S. Geol. Surv., No. 152, p. 37. 

 Sapindopsis magnifolia, Fontaine, 1906, in Ward, Mon. U. S. Geol. Surv., 



vol. xlviii, 1905, pp. 481, 482, 528. 

 Sapindopsis tenuinervis Fontaine, 1906, in Ward, Mon. U. S. Geol. Surv., 



vol. xlviii, 1905, pp. 489, 528. 

 FicopJiyllum eucalyptoides Fontaine, 1906, in Ward, Mon. U. S. Geol. Surv., 



vol. xlviii, 1905, p. 489. 

 Sapindopsis magnifolia Berry, 1910, Proc. U. S. Natl. Mus., vol. xxxviii, p. 



642. 



Description. — Leaves commonly odd-pinnate, although occasional 

 abruptly pinnate forms occur, of considerable size, but somewhat variable 

 however, in tl4s respect. Leaflets 3 pairs, comparatively large, lanceolate, 

 tapering almost equally toward apex and base, the latter inequilateral 

 except in terminal leaflets, pointed, often lacking apical portions, length 

 increasing proximad, averaging about 10 cm,, longest seen 14 cm. 

 (estimated), shortest 5 cm., width varying from 1.1 cm. to 3.2 cm., inequi- 

 lateral, since the outer half of the lamina is broader than the inner half 

 and is markedly decurrent. This feature is least emphasized in the 

 basal leaves which may even have a considerable petiole, but becomes 

 increasingly pronounced distad, the terminal leaflets often forming a 

 bilobate or trilobate whole with the outer margins broadly decurrent and 



