Aristocapsa insignis
Indian valley spineflower, Indian Valley spineflower, Indian Valley spineflower
(c) Trevor Van Loon, some rights reserved (CC BY), uploaded by Trevor Van Loon · licence
Family: Polygonaceae · Type: Herb · Native
Conservation status: CNPS 1B.2
Aristocapsa insignis (Indian valley spineflower) is a native California herb in the Polygonaceae family, recognized by Recently segregated monotypic genus from Chorizanthe, distinguished by obconic fruit shape and other morphological characters specific….
Indian valley spineflower is a rare (CNPS 1B.2) California native annual found in south-central coastal ranges of California in Monterey and San Luis Obispo counties, growing in sandy habitats at elevations of 300 to 600 meters. Flowering from May to June, this delicate plant produces white to pink or rose-colored flowers in small clusters with distinctive 5-toothed tubular involucres. Growing with erect glandular stems reaching 2 to 10 centimeters tall, it forms compact plants with minimal branching. Its basal leaves are small, glabrous, and narrow, measuring 5 to 15 millimeters long and 1 to 4 millimeters wide. The fruit is a light green-brown to tan obconic structure approximately 1.5 millimeters long, containing a curved embryo.
Identification and appearance
Key characters: Recently segregated monotypic genus from Chorizanthe, distinguished by obconic fruit shape and other morphological characters specific to central coast populations
Habitat and range
Habitat: Sand
Elevation: 300-600 m
California counties: San Luis Obispo, Monterey, San Benito
Bloom period
Aristocapsa insignis blooms May-Jun.
Conservation status
CNPS 1B.2
How to tell it apart
vs Chorizanthe: Aristocapsa has exactly 5 awned teeth and 4 flowers per cup; Chorizanthe varies widely in both characters.; vs Dodecahema: Aristocapsa has 5 rim-only spines; Dodecahema has 6 basal spines plus 6 rim spines.; vs Centrostegia: Aristocapsa has only 5 rim spines (no basal spines); Centrostegia has 3 basal spines plus 5 rim spines.; vs Systenotheca: Aristocapsa has 5 awned teeth and 4 flowers per cup; Systenotheca has equal teeth and 3 flowers per cup.; vs Mucronea: Aristocapsa has 4 flowers per cup with 5 terminal awns; Mucronea has variable flower count with unequal teeth.
Frequently asked questions
Is Aristocapsa insignis native to California?
Yes. Aristocapsa insignis is native to California (recorded as native).
When does Aristocapsa insignis bloom?
Aristocapsa insignis blooms May-Jun.
Where in California does Aristocapsa insignis grow?
Aristocapsa insignis occurs in San Luis Obispo, Monterey, San Benito, at elevations of 300-600 m.
What plant family does Aristocapsa insignis belong to?
Aristocapsa insignis is in the Polygonaceae family, genus Aristocapsa.
Is Aristocapsa insignis rare or endangered?
Aristocapsa insignis carries California Rare Plant Rank 1B.2, state rank S1.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CNPS Rare Plant Inventory · Index of California Plant Names · CalPhotos · CDFW CNDDB
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.