Mirabilis species

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Scientific Name Mirabilis nyctaginea USDA PLANTS Symbol
Common Name Heart-leaf Four O'clock ITIS Taxonomic Serial No.
Family Nyctaginaceae (Four O'clock) SEINet Reference
Description Habitat: Dry, sandy, calcarous soils on hillsides, pastures, disturbed areas.
Plant: Erect perennial 1 to 3 feet tall; usually solitary stems with forked branches, ridged, often purplish.
Leaves: Opposite, upward-pointing, ovate-lanceolate to cordate, 2 to 4-3/4 inches long and from less than 1 to 2-1/2 inches wide with pointed tips; lower leaves on petioles up to 3/4-inch long; surfaces smooth or nearly so.
Inflorescence: Forked terminal cluster of groups of pink bell-shaped blossoms, usually 3 blossoms per involucre on a hairy peduncle; flower about 1/2-inch across with 5 notched lobes and 3 to 5 protruding stamens with pink filaments and yellow anthers.
Bloom Period: April to November.
References: Descr. adapted from "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of Texas" by Geyata Ajilvsgi and SEINet.
Texas Status
Scientific Name Mirabilis texensis (Mirabilis rotata) USDA PLANTS Symbol
Common Name Texas Four O'clock ITIS Taxonomic Serial No.
Family Nyctaginaceae (Four O'clock) Flora of North America Ref.
Description Habitat: Desert environment, sunny, gravelly limestone slopes.
Plant: Upright/ascending perennial 12 to 40 inches tall, slender, sparsely branched, somewhat hairy stems.
Leaves: Along lower portion of plant and/or clustered at base, blades ovate to oblong, 3/4 to 2-3/4 inches long and wide; petioles 1/8 to 1-1/2 inches long; pointed to rounded tips and smooth to glandular surfaces.
Inflorescence: Pink to purple bell-shaped blossoms, less than 1/2-inch across at branch tips and leaf axils; five notched lobes; protruding stamens.
Bloom Period: Summer and early fall.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston and Flora of North America.
Note: Found only in Big Bend and northern Mexico. M. rotata description from Correll & Johnston used as a reference.
Texas Status

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© Tom Lebsack 2019