Plant Image
Flower and leaves


Yavapai County Native & Naturalized Plants

Centrostegia thurberi - red triangles

Synonyms: Centrostegia thurberi var. macrotheca, Chorizanthe thurberi, Chorizanthe thurberi var. macrotheca
Other Common Names: spring flower, Thurber's spine-flower, Thurber's spiny-herb
Plant Form: Forb or Subshrub

Family: Polygonaceae


   
 
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Plant
Arizona State University Vascular Plant Herbarium, Usage Rights: Non-Commercial (CC BY-NC)
Forb Plant Description

Origin: Native   Life Cycle: Annual
General Desc: Erect and low-growing from a basal cluster of spatula-shaped green to red leaves. Stems are often red, branched at or near the base with spreading branches. Tiny flowers are mostly hidden by the red triangle-shaped leaf-like bracts beneath them.
Identification notes: Low growing dichotomously branched (branches split into 2 parts) annual with basal leaves; leaves mostly without hairs; sepals narrow, and hairy; flowers mostly solitary; bracts below flowers with 3 broad, conspicuous spreading spurs at the base.
Height: To nearly 8 inches


Habitat

Habitat Description: Sandy to gravelly flats and slopes; mixed grassland, saltbush, creosote bush, and chaparral communities.
Plant Communities: Desert Scrub, Interior Chaparral
Elevation: Below 4000 feet


Flower Characteristics

Color: White to pink     Shape: Bell-shaped in elongated clusters     Tubular: Y     Flowering Period: Mar - May
Description: Flowers grow in loose clusters at the stem tips. Each flower is 1/16 to 1/8 inch long, hairy, has white to pink tepals (fused petals and sepals) and 6 lobes. Beneath each flower are red, spine-tipped 3-lobed bracts that resemble the shape of a triangle.


Leaf and Stem Characteristics

Leaf Color: Green to red     Leaf Type: Simple     Leaf Shape: Round or oval     Leaf Margin: Smooth     Leaf Attachment: Basal     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Leaves are 3/4 inch to 2 inches long, grow in a rosette (circular cluster) at the plant's base, are spatula-shaped (slender base, very broad tip) and almost stalkless. Both leaves and stems are minutely hairy; stems have sparse glands and are usually red.


Fruit and Seed Characteristics

Fruit Color: Brown   
Fruit Type: Achene
Fruit Notes: Fruit is about 1/16 inch long, smooth, dry, brown and egg-shaped. It contains 1 seed and does not open to release the seed when mature.
Seed Notes: Straw-colored seeds are globe-like on the bottom tapering to a point at the top resembling the shape of a teardrop.



  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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