Plant Image
Flowers


Yavapai County Native & Naturalized Plants

Datura discolor - desert thorn-apple

Synonyms: Datura thomasii
Other Common Names: small datura, desert thorn apple, desert datura, desert thornapple
Plant Form: Forb or Subshrub

Family: Solanaceae


   
 
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Leaves
Patrick Alexander @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Fruit
Carolyn Chilcote @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Plant
Ries Lindley @http://swbiodiversity.org, Usage Rights: Attribution-Non-Commercial (CC BY-NC)
Forb Plant Description

Origin: Native   Life Cycle: Annual   Similar Species: Datura wrightii
General Desc: Can be short-lived perennial. Upright or low-lying bushy plant; thick, grayish-green stems, hairy to smooth; triangular green leaves are foul-smelling; showy, white, fragrant trumpet-shaped flowers, distinct purple markings in the throat.
Identification notes: Wavy toothed leaf margins; flowers white, purple markings in the throat, less than 6 inches long; fruits sticky, droop downward, hairy. Similar to D. wrightii but plants generally smaller with smaller flowers and fewer spines on the fruit.
Height: To almost 5 feet


Habitat

Habitat Description: Roadsides, waste grounds, drainage ditches, sandy, loose or gravelly soils of washes, river flats, river "bottoms" (low-lying land along a river) and wet, marshy areas at the edges of mountains, canyons and wet areas in grasslands (cienagas).
Plant Communities: Riparian, Disturbed Areas
Elevation: Below 2000 feet


Flower Characteristics

Color: White, purple markings     Shape: Regular not in clusters     Tubular: Y     Flowering Period: Mar - Oct
Description: Upright, fragrant, night-blooming, trumpet-shaped, solitary flowers to about 6 inches long. 4 inch wide white blooms have a purple-stained throat which widens at the top forming 10 sections each with a sharp, tapering point extending beyond the bloom.


Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Triangular     Leaf Margin: Toothed     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Leaves with stalks up to 7-1/2 inches long and 6 inches wide have a strongly wavy to toothed margin. Leaves are somewhat hairy on both upper and lower surfaces with short, soft hairs.


Fruit and Seed Characteristics

Fruit Color: Green to purple, ages brown   
Fruit Type: Capsule
Fruit Notes: Round sticky fruit to 1-1/2 inches wide which bends to 1 side and droops downward, has short, soft hairs and is covered with 200 to 300 large, sharp, thorn-like prickles to 1-1/4 inches long. Fruit splits along 4 seams to release seeds.
Seed Notes: Seeds are black when ripe, have a wrinkled surface, are kidney-shaped and about an 1/8 inch long. Fresh seeds have a small, white bump on 1 side which is called a "caruncle".



  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 8.0  
http://cales.arizona.edu/yavapaiplants/SpeciesDetailForb.php  
Last Updated: Dec 13, 2022
Content Questions/Comments: Email Matt Halldorson  
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