Tilia (Tiliaceae)


Tilia americana
© 1997 OPLIN OHS


Tilia cordata
Univ. Uppsala


Tilia americana
USDA APMRU

Plant:
Leaves deciduous, simple, alternate, heart-shaped and finely toothed with an uneven base. Bark is gray and ridged. Fruits are nutlets suspended below a leaf-like bract.

Pollen light micrograph:
Triporate 45-50 µm, oblate, reticulate, with characteristic internal thickenings arouund the pores.

Pollen scanning electron micrograph (SEM)
Thickenings around pores not visible.

Production and Dispersal:
Low production, low dispersal.

Preservation:
Well preserved.

Fossil Occurrence:
Present in the Oligocene Claiborne FM of Southeastern U.S.A. (Tsuchdy & Scott, 1969).

References:
    Tsuchdy, R.H. and Scott, R.A. 1969.
    Aspects of palynology. Wiley Interscience.

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