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.

Illustrated
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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Illustrator:

Copyright:

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

V5 994-distribution-map.gif

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

"/2" is not declared as a valid unit of measurement for this property."/4" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

... more about "Centrostegia thurberi"
3-gonous +
pink +  and red +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
James L. Reveal +
A. Gray in A. P. de Candolle and A. L. P. P. de Candolle +
straight +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
stipelike +
awn-tipped +  and simple +
oblong;broadly spatulate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
pubescent +  and glabrous +
scale-like +  and leaflike +
solid +, disarticulating +  and dichotomous +
not brittle +
just below the soil surface or and above the soil surface +  and spreading +
Ariz. +, Calif. +, Nev. +, Utah +, Mexico (Baja California) +  and Mexico (Sonora) +
300-2400 m +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
unisexual +  and bisexual +
disarticulating +  and solid +
decumbent to erect +  and prostrate +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
Sandy to gravelly flats and slopes, mixed grassland, saltbush, creosote bush, and chaparral communities, pine-oak and montane conifer woodlands +
uniparous +  and cymose +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
3-angled +, prismatic +  and tubular +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
nonmembranous +
3.5 cm35 mm <br />0.035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
deciduous +
cauline +  and basal +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
cylindric +  and campanulate +
accrescent +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
Flowering Mar–Jul. +
homostylous +  and 3-carpellate +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
, +  and solid +
slender;stout +
Illustrated +
disarticulating +  and solid +
decumbent to spreading or erect +  and prostrate +
erect +  and spreading +
not fistulose +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
Centrostegia thurberi var. macrotheca +, Chorizanthe thurberi +  and Chorizanthe thurberi var. macrotheca +
chambered +, , +  and solid +
Centrostegia thurberi +
Centrostegia +
species +
oblanceolate +
coriaceous +
keeled +  and flattened +
persistent +
membranous +
pubescent +  and glabrous +
3 +, 2 +  and 1 +