Centrostegia thurberi

A. Gray in A. P. de Candolle and A. L. P. P. de Candolle
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 27. 1856.
Synonyms: Centrostegia thurberi var. macrotheca (J. T. Howell) Goodman Chorizanthe thurberi Chorizanthe thurberi var. macrotheca J. T. Howell
Treatment appears in FNA Volume 5. Treatment on page 473.
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Plants 0.3–2(–3) × (0.6–)1–4(–5) dm. Leaf blades (0.5–)1–3.5(–4) × 0.3–0.8(–1) cm. Inflorescences: bracts mostly spreading, (1–)2–6(–10) mm; awns 1–2 mm. Involucres (2–)3–6(–8) mm; basal spurs with awns 0.2–2 mm; teeth flattened and keeled distally, awn erect, short, 0.3–1 mm. Flowers: perianth 2–3(–3.5) mm; tepals oblanceolate; filaments 1–3 mm; anthers 0.4–0.5 mm. Achenes 2–2.5 mm. 2n = 38.


Phenology: Flowering Mar–Jul.
Habitat: Sandy to gravelly flats and slopes, mixed grassland, saltbush, creosote bush, and chaparral communities, pine-oak and montane conifer woodlands
Elevation: 300-2400 m

Distribution

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Ariz., Calif., Nev., Utah, Mexico (Baja California, Sonora).

Discussion

Centrostegia thurberi is fairly consistent morphologically throughout its range except for individuals in some populations in the mountains of the southern Coast Ranges that tend to have slightly longer and more robust involucres. The name var. macrotheca is available for such plants.

Selected References

None.

Lower Taxa

None.

... more about "Centrostegia thurberi"
James L. Reveal +
A. Gray in A. P. de Candolle and A. L. P. P. de Candolle +
Ariz. +, Calif. +, Nev. +, Utah +, Mexico (Baja California +  and Sonora). +
300-2400 m +
Sandy to gravelly flats and slopes, mixed grassland, saltbush, creosote bush, and chaparral communities, pine-oak and montane conifer woodlands +
Flowering Mar–Jul. +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Centrostegia thurberi var. macrotheca +, Chorizanthe thurberi +  and Chorizanthe thurberi var. macrotheca +
Centrostegia thurberi +
Centrostegia +
species +