Carya (Juglandaceae)

Carya texana
Genus Carya L.J.Grauke

Carya alba
G.Jones APMRU

Carya alba
G.Jones APMRU

Plant:
Large deciduous trees with single trunks and upright cylindrical crowns. Leaves odd-pinnately compound with lanceolate to obovate leaflets with serrate edges. Male flowers in catkins, female flowers in spikes. Fruit (pecan) thin shelled, enclosed in a husk.

Pollen light micrograph:
Pollen grains triporate, psilate - scabrate, spherical - oblate to slightly triangular, 40 - 45 µm. Pores slightly annualate, without operculum, often displaced to one hemisphere (isopolar). Wall thickness uneven.

Pollen scanning electron micrograph (SEM)
Sculpture varies from psilate to scabrate.

Production and Dispersal:
Heavy production but moderate to poor dispersal.

Preservation:
Good preservation.

Fossil Occurrence:
Earliest fossils date to the late Cretaceous (135 Ma), becomming abundant in the Oligocene (35 Ma).

Fredericksen, N. O. and R. W. Christopher. 1978.
Taxonomy and biostratigraphy of late Cretaceous and Paleogene Triatriate pollen from South Carolina. Palynology 2:113­145.

Nichols, D. J. and H. L. Ott. 1978.
Biostratigraphy and evolution of the Momipites - Caryapollenites lineage in the early Tertiary in the Wind River Basin, Wyoming. Palynology 2:93­112.

An Introduction to the genus Carya L.J.Grauke

Carya alba Juglandaceae LM G.Jones APMRU

Carya alba Juglandaceae SEM G.Jones APMRU

Carya aquatica Juglandaceae SEM G.Jones APMRU

Carya cordiformis Juglandaceae LM G.Jones APMRU

Carya cordiformis Juglandaceae SEM G.Jones APMRU

Carya glabra Juglandaceae SEM G.Jones APMRU

Carya illinoinensis Juglandaceae SEM G.Jones APMRU

Carya texana Juglandaceae LM G.Jones APMRU

Carya texana Juglandaceae SEM G.Jones APMRU

Owen K. Davis 04/00