tulip tree; yellow poplar
Liriodendron tulipifera L.
Liriodendron tulipifera is a large tree, reaching an eventual height of about 36 meters that is native to the eastern US. It is also native in Arkansas, and at one time was apparently restricted to Crowley's Ridge in the northeastern portion of the state. However, L. tulipifera illustrates how even a native plant species with a restricted distribution in a particular geographic area, i. e. in Arkansas, can still naturalize subsequent to introduction into areas where it is not native. In Arkansas, L. tulipifera often escapes in places where cultivated. The wind-dispersed seeds allow spontaneous plants to show up long distances from cultivated plants. Liriodendron is regularly found outside of cultivation in Clark County, Arkansas, where spontaneous plants have originated from cultivated ones. It is also spontaneous in several Arkansas counties to the west and south of Crowley's Ridge.
Figures for Liriodendron tulipifera:
A-D. leaves (fig. D shows the leaf undersurface);
G. mature fruit;
K-L. spontaneous seedlings in Clark County, Arkansas.