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Flowers and fruit


Yavapai County Native & Naturalized Plants

Euphorbia eriantha - beetle spurge

Synonyms: Euphorbia exclusa, Poinsettia eriantha
Other Common Names: threaded spurge, desert poinsettia, Mexican poinsettia
Plant Form: Forb or Subshrub

Family: Euphorbiaceae


   
 
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Flowers and fruit
David Sussman @http://swbiodiversity.org, Usage Rights: CC BY-NC (Attribution-Non-Commercial)
Leaves
Sue Carnahan @http://swbiodiversity.org, Usage Rights: CC BY-NC (Attribution-Non-Commercial)
Plant
Sue Carnahan @http://swbiodiversity.org, Usage Rights: CC BY-NC (Attribution-Non-Commercial)
Fruit
Liz Makings @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)
Forb Plant Description

Origin: Native   Life Cycle: Annual
General Desc: Stems erect to ascending; smooth, or hairy becoming smooth with age; narrow leaves at right angles to stems; flowers at branch tips; fruits relatively large when compared to rest of plant; foliage may be dark in color, greenish-purplish-reddish.
Identification notes: Stems erect to ascending; leaf blades narrow, margins smooth, 2 to 4 small teeth at tips; 23 to 36 male flowers in 5 clusters surround 1 female flower, styles red; glands green to brownish-red, hairy, appendages narrow, pointed, curving over the glands.
Height: 4 to 30 inches


Habitat

Habitat Description: Found on dry soils on hot, rocky slopes, along washes, in canyons, in the shelter of small shrubs.
Plant Communities: Desert Scrub,
Elevation: 300 - 3500 feet


Flower Characteristics

Color: Green, brownish-red     Shape: Regular in round clusters     Tubular: N     Flowering Period: Feb - Oct
Description: Flowers solitary or a few clustered at branch tips; 23 to 36 male flowers, generally in 5 clusters around a solitary female flower; 3 red styles; 4 to 5 green to brownish-red glands obscured by hairs; 5 to 7 petal-like appendages curving over the glands.


Leaf and Stem Characteristics

Leaf Color: Greenish-reddish-purplish     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Alternate, narrow, 3/4 to 3 inches long, 2 to 4 small teeth at pointed tips, margins smooth, surfaces hairy, becoming hairless with age, leaf blades with short stalks and minute, leaf-like appendages at base of stalk; visible midvein.


Fruit and Seed Characteristics

Fruit Type: Capsule
Fruit Notes: Oblong, 3-lobed (the lobes not obvious) capsules, 1/4 inch long, plainly longer than wide, with hairy surfaces.
Seed Notes: Seeds white to gray, 1/4 inch long, flattened top to bottom, 4-angled, wart-like surfaces, irregularly pitted (small depressions) and an obvious caruncle (appendage at seed attachment).



  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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