arTt.19. MIOCENE PLANTS FROM SOUTHERN MEXICO—BERRY. 11 
Family HAMAMELIDACEAE. 
Genus LIQUIDAMBAR Linnaeus. 
LIQUIDAMBAR INCERTA, new species. 
Plate 3, fig. 5. 
From the locality near San Jose del Carmen there are five speci- 
mens of fruits that are indistinguishable from fruits that I have 
described under the above name from the Tertiary of the Mississippi 
embayment.'!° They appear to represent ferruginous mud casts of 
the capsular cavities with the beaks worn away, and are similar in 
appearance.to specimens from both the European and North Ameri- 
can late Tertiary that have been referred to Liquidambar europaeum 
Alex. Braun and Liquidambar styraciflua Linnaeus. Their reference 
to Liquidambar is by no means conclusive, and I have suggested this 
uncertainty in the specific name incerta. It is possible that they 
may represent some unknown form of Moraceae or Rubiaceae. On 
the other hand Liquidambar is a warm temperate type which is still 
found in southern Mexico above 800 meters, but not in the tropical 
altitudinal zone. It may be that these fruits were brought down to 
sea level by streams from some adjacent Miocene upland, which 
would explain the absence of leaves. 
The geological history of Liquidambar has been discussed both by 
the writer '! and by Laurent.” The existing species are four in 
number and botanically very similar although geographically remote, 
being segregated in the southeastern United States, the uplands of 
Central America, Asia Minor, and southeastern Asia. 
Occurrence.—14 km. west of telegraph station San Jose del Car- 
men, State of Vera Cruz. 
Holotype.—Cat. No. 36820, U.S. N. M. 
Family MIMOSACEAE. 
Genus INGA Willdenow. 
INGA MIOCENICA, new species. 
Plate 5, fig. 3. 
Leaflets relatively small, sessile, broadly lanceolate, slightly fal- 
cate, and markedly inequilateral in outline. Apex and base about 
equally and markedly acuminate. Margins entire. Texture not 
10 Berry, E. W., U.S. Geol. Survey Prof. Paper 92 (in press). 
1 Berry, E. W., Plant World, vol. 22, pp. 345-352, 1919. 
12 Laurent, L., Ann. Mus. d’Hist. Nat. Marseille, vol. 17, pp. 9-27, 1919. 
