25 Mei 2010

Catalpa speciosa

Catalpa speciosa, commonly known as the Northern Catalpa, is a species of Catalpa that is native to the midwestern United States in Arkansas, Illinois, Indiana, Missouri, Kentucky, Pennsylvania, and Tennessee.

It is a medium-sized deciduous tree growing to 15-30 meters tall and 12 meters wide. It has a trunk up to 1 m diameter with brown to gray bark, maturing into hard plates or ridges.

The leaves, deciduous, opposite (or whorled), are large, heart shaped, 20-30 cm long and 15-20 cm broad, pointed at the tip and softly hairy beneath.

The flowers are 3-6 cm across, trumpet shaped, white with yellow stripes and purple spots inside; they grow in panicles of 10-30.

The catalpa tree is the last tree to grow leaves in the spring. The leaves generally do not color in autumn before falling, instead, they either fall abruptly after the first hard freeze, or turn a slightly yellow-brown before dropping off.

The winter twigs of Northern Catalpa are like those of few other trees, having sunken leaf scars that resemble suction cups. Their whorled arrangement (three scars per node) around the twigs is another diagnostic.

The fruit is a long, thin bean like seedpod 20-40 cm long and 10-12 mm diameter; it often stays attached to tree during winter (and can be mistaken for brown icicles). The pod contains numerous flat light brown seeds with two papery wings.

It is closely related to Southern Catalpa, and can be distinguished by the flowering panicles, which bear a smaller number of larger flowers, and the slightly broader seed pods.

It is also known as Hardy Catalpa, Western Catalpa, Cigar Tree, and Catawba-Tree.

Source: http://en.wikipedia.org/wiki/Catalpa_speciosa

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