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Highlands Center for Natural History - SS

Yavapai County Native & Naturalized Plants

Mirabilis oxybaphoides - smooth spreading four o'clock

Synonyms: Allioniella oxybaphoides
Other Common Names: wild four o'clock
Plant Form: Forb

Family: Nyctaginaceae

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Highlands Center for Natural History
Highlands Center for Natural History
Basal leaves
Highlands Center for Natural History
Leaf attachment
Highlands Center for Natural History
Plant - summer
Highlands Center for Natural History
Plant - summer
Highlands Center for Natural History
Forb Plant Description

Origin: Native   Life Cycle: Perennial
General Desc: Can be a spreading or erect plant, multi-branched and often forms clumps up to 4 feet in diameter.
Identification notes: Tubular flowers with 5 colored sepals and no petals. Bracts deeply 5 cleft and subtend more than 1 flower. Calyx is less than 1/2 inch long. Leaves heart-shaped at the base.
Height: 2 feet


Habitat Description: Clearings, roadsides and dry hillsides.
Plant Communities: Pinyon Juniper Woodland, Montane Conifer Forest, Disturbed Areas
Elevation: 6000 - 8000 feet

Flower Characteristics

Color: Purplish-red     Shape: Regular in clusters     Tubular: Y     Flowering Period: Aug - Sep
Description: Flowers up to 3/8 inch long. Funnel-shaped with notched lobes. Has 3 flowers within hairy bracts and 3 or 4 yellow tipped stamens. Cluster is loosely arranged to 3/4 inch wide with 3 flowers.

Leaf and Stem Characteristics

Leaf Color: Dark green     Leaf Type: Simple     Leaf Shape: Round or Oval     Leaf Margin: Smooth     Leaf Attachment: Opposite     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Leaves are up to 3-1/2 inches long. Has wavy margins with long stalk. Elliptical to oval but shape varies.

Fruit and Seed Characteristics

Fruit Color: Dark brown or black   
Fruit Type: Achene
Fruit Notes: Smooth and sometimes faintly marked with 5 shallow grooves. Inversely ovoid to nearly spheric. Less than 1/8 inch long.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 3.1  
Last Updated: June 15, 2013  
Content Questions/Comments: Email Jeff Schalau  
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