Selected Plants of Navajo Rangelands
(a.k.a. trailing windmills, guapile)
Four o'clock is a prostrate perennial herb which is glandularly pubescent. The flowers are pink and notched. The leaves are wedge shaped. The three flowers of four o'clock in each whorl all flower at the same time and are very close together, giving the illusion of one large completely symmetrical flower. Actually, the three flowers are each individually bilaterally symmetrical. The complicated fruit of four o'clock has two incurved wings that are frequently triangularly toothed, and it has two rows of glands on its surface. Four o'clock is found in low, dry, rocky areas.
*Description courtesy of Western New Mexico University's Vascular Plants of the Gila Wilderness.
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