1903] ARALIA IN AMERICAN PALEOBOTANY 425 
toniana Lx., Dakota Tuscaloosa, and Raritan; A. digitata Ward, Fort Union 
group; A. Zaddachi ? Heer, Miocene. 
: SECTION 2. 
Thick leaves rather orbicular in outline, with a long petiole (so 
far as it is known), lobes 3 to 5, broad and obtusely pointed, 
showing a tendency to become sub-lobate; base but slightly 
decurrent, generally rounded or truncate; sinuses open, extend- 
ing about half way to the base; margins entire; secondaries 
camptodrome; primaries three, basal or sub-basal; lateral pri- 
maries unbranched, usually with sub-primaries below; areolation 
usually obsolete; smaller leaves than in section 1. A common 
type of mid-Cretaceous leaf is that which has been referred to 
Aralia groenlandica Heer and which has been recorded from the 
more or less synchronous strata of the Atane schists, the Dakota 
group, the New Jersey Raritan and Matawan formations, and the 
Island Raritan. I take as typical leaves of this species Heer’s 
J. 3. pl. 38 Fl. Foss. Arct. 6, abth. 2 and Lesquereux’s fz, pl. 54, 
Fl. Dak. Gr.; and it may be noted that Heer includes leaves 
which are considerably removed from this type, while Lesquer- 
eux includes Dakota leaves (fig. 2, doc. cit.) which approach on 
the one hand his Avalia subemarginata and on the other (fig. 3, 
foc. cit.) leaves which approach the synthetic group of Aralias 
which Newberry describes from the Raritan formation of New 
Jersey. This groenlandica type of leaf seems to be a rather 
primitive one, a leaf from which numerous rather closely related 
Species have been derived. 
This section includes: Aralia groenlandica Heer, Atane, Dakota, Rari- 
tan, Matawan, Island; A. gracilis Lx., Laramie ?; A. notata Lx., Denver and 
Fort Union; A, patens, Newb., Raritan, Island; A. rotundiloba Newb., Rari- 
tan and Island; A. polymorpha Newb., Raritan; A. palmata Newb., Raritan 
and Matawan; A. subemarginata Lx., Dakota; A. Brittonianum Berry, 
Matawan ; A. acerifolia Lx., Ft. Union and Miocene. 
SECTION 3. 
Mostly large, very coriaceous, fan-like leaves, with very stout 
petioles and primaries ; lobes 3 to 5 or more(?); the lobes long and 
rather slender (except A. Ravniana), obtusely pointed; sinuses 
narrow, primary ones deep, extending nearly to the base; base 
