PSC 2620: Woody Trees and ShrubCourse HomeStudy Materials

Tilia Species Comparisons


This page is intended to help you become more familiar with the different Tilia species. Here you can quickly compare the different species to better learn the distinguishing characteristics of each.
Leaf
Tilia americana - The leaf is broadly ovate with an obliquely cordate base. The margins have a rougher serration than that of Tilia cordata. Tilia cordata - The leaf is rounded-ovate leaf with an obliquely cordate base. The margin of the leaf is finely serrated.

Fruit
Tilia americana - The seeds are 1/4 inch in diameter and hard. They can not be crushed inbetween your fingers. Tilia cordata - The seeds are 1/4 inch in diameter. The shell of the seed can be crushed between your fingers.

Bark
Tilia americana - The bark has very pronounced ridges, with the tip of each ridge being visibly flattened. Tilia cordata - The bark has proundounced furrows and ridges and orangish undertones in the valleys.

Form
Tilia americana - It is a large shade tree growoing 60-80 feet high and half that wide. It has a strong pyramidal shape when young, but becomes more ovate when mature. Tilia cordata - It is a large shade tree that will grow to be 60-70 feet high and a little over half that wide. Ithas a strongly pyramidal form when young but becomes more upright as it matures.