Plant Image
Willow Dells Tr - Sue Smith

Yavapai County Native & Naturalized Plants

Mirabilis longiflora - sweet four o'clock

Other Common Names: long-flowered four o'clock, longtube four o'clock
Plant Form: Forb

Family: Nyctaginaceae

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Willow Dells Tr
Sue Smith
Willow Dells Tr
Sue Smith
Flower buds
Willow Dells Tr
Sue Smith
Willow Dells Tr
Sue Smith
Plant - summer
Willow Dells Tr
Sue Smith
Forb Plant Description

Origin: Native   Life Cycle: Perennial
General Desc: Heavily branched dark green forb with tuberous roots. Flowers are fragrant and open in the shade of the late afternoon.
Identification notes: 5-parted calyx 3 to 7 inches long; whorl of united bracts below a single flower, little changed in fruit; fruit not strongly 5-angled.
Height: To 5 feet


Habitat Description: Rocky canyons and slopes, rich soils among trees and shrubs.
Plant Communities: Interior Chaparral, Pinyon Juniper Woodland, Montane Conifer Forest
Elevation: 2500 - 7000 feet

Flower Characteristics

Color: White, pinkish     Shape: Regular in round clusters     Tubular: Y     Flowering Period: Aug - Sep
Description: 4–6 inches long, with a red throat, spreading into a white blossom 1/2–3/4 inch across at the opening, with 6 long, purple stamens and red anthers. Flower buds form loose clusters near the top of the plant but only one or two bloom at one time.

Leaf and Stem Characteristics

Leaf Color: Dark green     Leaf Type: Simple     Leaf Shape: Triangular     Leaf Margin: Smooth     Leaf Attachment: Opposite     Leaves Clasp: N
Hairs: Stems     Spines: N
Leaf Description: The lower leaves have stems 1-1/2 inches long; the upper leaves have no stem and taper to a sharp point. Leaves are 3 to 4 inches long. Branches and the flowers grow out of the leaf axils. The stem is heavy, brittle, and sticky.

Fruit and Seed Characteristics

Fruit Color: black to dark brown   
Fruit Type: Achene

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 7.0  
Last Updated: May 10, 2017  
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