FOUR-O'CLOCK FAMILY. Nyctaginaceae.
A rather large family, widely distributed, most abundant in America. Ours are herbs, often succulent, with no stipules; stems often fragile, swollen at the joints; leaves opposite, usually toothless, often unequal; flowers perfect, with no petals, but the calyx colored like a corolla, with four or five lobes or teeth, and more or less funnel-shaped; one or several flowers in a cluster with an involucre; stamens three to five, with slender filaments; style one, with a round-top stigma; the green base of the calyx drawn down around the ovary, making it appear inferior, and hardening into a nutlike fruit; seeds sometimes winged.
Quamoclidions have the odd habit of opening in the afternoon, hence the common name, Four-o'clock. The flowers usually have five stamens, and are grouped several together in a cluster, which emerges from an involucre so much resembling a calyx that it is often mistaken for one. The effect is of the flowers having clubbed together and made one calyx do for the lot. The fruit is hard, smooth, and roundish.
Four-o'clock
Quamoclídion multiflòrum.
(Mirabilis)
Pink, purple
Spring
Southwest and Col.
The leaves of this low, stout, and spreading perennial are an inch or two long, light bluish-green, somewhat heart-shaped, rather rough and coarse, and the stems are often hairy and sticky. The foliage contrasts strikingly in color with the gaudy pink or magenta flowers, an inch across and slightly sweet-scented, the shape of Morning-glories and resembling them, as they have the same stripes of deeper color. The long stamens droop to one side, the pistil is long and purple and the bell-shaped involucre contains about six flowers. These plants are conspicuous and quite handsome. They grow on the plateau in the Grand Canyon.
There are several kinds of Hesperonia, much like Quamoclidion, but the bell-shaped involucre contains only one flower, which is also bell-shaped, usually with five separate stamens. The fruit is roundish, not angled or ribbed, usually smooth.
Four o'clock—Quamoclidion multiflorum.
California Four-o'clock
Hesperònia Califórnica
(Mirabilis)
Magenta, pink
Spring, summer
California
This is very common in southern California and forms quite large, low clumps of rather yellowish green, sticky and hairy foliage, sprinkled with numbers of bright little flowers, opening in the afternoon. The base is woody and the weak, hairy stems are supported on bushes, as if climbing over them. The leaves are rather thick, about an inch long, and the flowers are open bell-shaped, about three-quarters of an inch across, usually magenta, but often pink of various shades, sometimes quite pale in tint with long stamens drooping to one side, and the involucre is often purplish and very hairy and sticky. The effect at a distance is gay and attractive, though the plant is not quite so pretty close by.