ART. 14. TERTIARY FOSSIL PLANTS FROM HAITI——BERRY. 5 
with acuminate apex and base. The midvein is stout and promi- 
nent, expanded proximad to form a knoblike, subsessile base. Lateral 
veins numerous, closely spaced, parallel, diverging from the midvein 
at wide angles and pursuing straight courses to the margins, pre- 
vailingly simple, although a single instance of a basal dichtomy 
was observed. 
Fragments of this fern are rather common and occur in the col- 
lections from three different localities. There are 15 specimens 
from station 7544, 9 specimens from station 7542, and a single speci- 
men from station 7541. Except for the simple veins and entire 
margins this form is much like blechnum betijoquensis Berry * of the 
Miocene of Venezuela, and it may be a species of Blechnum, some 
species of which have simple lateral viens. All of the localities from 
which the present species is recorded have been referred to the 
Miocene. 
Occurrence.—Artibonite group, Miocene (stations 7544, 7542); Mio- 
cene (station 7541). 
Cotypes.—Cat. Nos. 36606-36609, U.S.N.M. 
Class DICOTY LEDONAE. 
Order CHENOPODIALES. 
Family NYCTAGINACEAE. 
Genus PISONIA Linnaeus. 
PISONIA CONDITI Berry. 
Plate 1, fig. 5. 
Pisonia conditi Berry, Proc. U. §. Nat. Mus., vol. 59, p. 119, pl. 21, fig. 1, 1921. 
This species was described by me as follows: Leaves of small size, 
lanceolate, and slightly inequilateral in general outline, widest in the 
middle and equally pointed at the apex and base. Margins entire. 
Texture coriaceous. Length about 3.25cem. Maximum width about 
1.1 cm. Petiole very short and stout, only a millimeter or two in 
length. Midrib stout and prominent. Secondaries thin, immersed; 
five or six alternate camptodrome pairs diverge from the midrib at 
angles of about 45 degrees. These small leaves are characteristically 
inequilateral by having the basal margin flat on one side and curved 
on the other, with the distal margin flat on the opposite side and 
curved on the other side. 
This species was based upon material of Tertiary (Miocene or Pli- 
ocene) age, collected at Sanchez, Dominican Republic. What appears 
‘Berry, E. W., Proc. U.S. Nat. Museum, vol. 59, p. 559, pl. 107, fig. 1, 1921. 
