Chorizanthe leptotheca

Goodman

Ann. Missouri Bot. Gard. 21: 61. 1934.

Common names: Ramona spineflower
Treatment appears in FNA Volume 5. Treatment on page 463. Mentioned on page 449.

Plants erect to spreading, 0.5–3 (–3.5) × 0.5–3 (–5) dm, thinly pubescent. Leaves basal; petiole 1–3 (–4) cm; blade oblong to oblong-ovate, 0.5–2 (–3) × 0.3–0.5 (–0.7) cm, thinly pubescent adaxially, usually densely tomentose adaxially. Inflorescences mostly flat-topped and openly branched, usually reddish; bracts soon deciduous, 2, occasionally leaflike at proximal nodes and similar to proximal leaf-blades only more reduced, short-petiolate, ovate, 0.3–0.4 cm × 2–3 mm, otherwise sessile, linear and acicular, often acerose, 0.1–0.3 cm × 0.7–1 mm, awns straight, 0.5–1 mm. Involucres in congested clusters with 1 at node of dichotomies, reddish, cylindric, not ventricose, 3–4 mm, not corrugate, without scarious or membranous margins, thinly pubescent; teeth spreading, unequal, 0.7–1.5 mm with longer of 3 longest ones more erect than 3 other shorter and less-prominent ones, awns uncinate, 0.5–1 mm. Flowers long-exserted; perianth rose to red, infrequently with white lobes, cylindric, 4.5–6 mm, pubescent; tepals connate ca. 1/2 their length, dimorphic or sometimes monomorphic, narrowly oblanceolate, apex rounded, those of outer whorl slightly broader and occasionally longer than those of inner whorl; stamens 9, mostly included; filaments distinct, 4–6 mm, glabrous; anthers pink to red, ovate to oblong, 0.5–0.6 mm. Achenes brown, lenticular, 3–4 mm. 2n = 38.


Phenology: Flowering May–Aug.
Habitat: Sandy to gravelly flats and slopes, grassland and chaparral communities, pine-oak woodlands
Elevation: (300-)600-1600(-1900) m

Distribution

V5 967-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

Chorizanthe leptotheca is found in the foothills of the San Bernardino Mountains of San Bernardino County southward along the eastern edge of the Santa Ana Mountains, and through the San Jacinto and Santa Rosa mountains of Riverside County into the mountains of central San Diego County. The species is also found in north-central Baja California.

Ramona spineflower is clearly related to Chorizanthe staticoides, but that species occurs to the west of the range of C. leptotheca and the two are not known to be sympatric.

Selected References

None.

Lower Taxa

None.

"/2" 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 "Chorizanthe leptotheca"
lenticular +
pink +  and red +
ovate +  and oblong +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
rounded +
broader +
James L. Reveal +
Goodman +
alternating +
straight +
uncinate +
unequal +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
alternate +  and rosulate +
stipelike +
awn-tipped +  and simple +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
tomentose +  and pubescent +
oblong;oblong-ovate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
sessile +  and short-petiolate +
deciduous +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
glandular +, woolly-floccose +, tomentose +, strigose +, villous +, hirsute +  and pubescent +
acerose +, acicular +  and ovate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
disarticulating +, dichotomous +, branched +  and open +
erect +  and spreading +
just below the soil surface or and above the soil surface +  and spreading +
Ramona spineflower +
Calif. +  and Mexico (Baja California) +
(300-)600-1600(-1900) m +
curved +  and straight +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
white +  and pink or rose maroon or purple or yellow +
long-exserted +
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, grassland and chaparral communities, pine-oak woodlands +
connate +  and free +
not ventricose +  and cylindric +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
nonmembranous +
lanceolate +  and ovate or spatulate +
in whorls +, opposite +, alternate +  and rosulate +
deciduous +  and persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
membranous +  and scarious +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
cylindric +
accrescent +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering May–Aug. +
homostylous +  and 3-carpellate +
Ann. Missouri Bot. Gard. +
, +  and solid +
slender;stout +
not disarticulating +
decumbent to erect +  and prostrate +
prostrate +  and erect +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading +
spreading;erect +
Chorizanthe sect. Anisogonum +, Chorizanthe sect. Eriogonellopsis +  and Chorizanthe sect. Herbaceae +
chambered +, , +  and solid +
slender +  and stout +
Chorizanthe leptotheca +
Chorizanthe sect. Ptelosepala +
species +
oblanceolate +
coriaceous +
shallow +
less-prominent +
unequal +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
3 +, 2 +  and 1 +