Chorizanthe douglasii

Bentham

Trans. Linn. Soc. London 17: 418. 1836.

Common names: Douglas’s spineflower
IllustratedEndemic
Synonyms: Chorizanthe nortonii Greene
Treatment appears in FNA Volume 5. Treatment on page 452. Mentioned on page 447.
Please click on the illustration for a higher resolution version.
Illustrator:

Copyright:

Plants erect, 1–4 (–5) × 0.5–3 dm, villous. Leaves basal; petiole 1–3 (–6) cm; blade oblanceolate, 0.5–2 (–4) × 0.1–0.4 (–1) cm, villous. Inflorescences cymose, dichotomously branched throughout, white to greenish or reddish; bracts usually 2, similar to proximal leaf-blades, typically with whorl of 3–5 ca. midstem, short-petiolate, becoming linear and aciculate at distal nodes, acerose, 0.5–2 (–3) cm × 1–5 (–10) mm, awns absent. Involucres congested in small leafy terminal clusters of 2–4 at nodes of dichotomies, greenish, cylindric, slightly ventricose basally, 3–5 mm, with conspicuous, purple, broad, membranous margins typically extending across sinuses, finely corrugated, hispid at least along ridges, otherwise sparsely pubescent; teeth spreading, equal, (0.7–) 1–1.5 mm, awns straight, 0.5–1 mm. Flowers exserted; perianth white to rose, cylindric, 3.5–4 (–4.5) mm, slightly pubescent abaxially; tepals connate 2/3 their length, monomorphic, obovate, 2-lobed or denticulate apically, infrequently inner whorl entire; stamens 9, slightly exserted; filaments distinct, 3–4 mm, glabrous; anthers pink to red, oblong, 0.5–0.6 mm. Achenes light-brown, globose-lenticular, 3.5–4 mm. 2n = 40.


Phenology: Flowering Apr–Jul.
Habitat: Sandy to gravelly flats and slopes, mixed grassland communities, oak and pine woodlands
Elevation: (200-)300-1600 m

Discussion

Chorizanthe douglasii is restricted to the Santa Lucia Mountains and to the San Gabilan and La Panza ranges of west-central California. The species is infrequent but can be locally common. A single collection made in the Santa Cruz Mountains (Rowntree s.n., 16 Jun 1929, CAS) may have been made in Santa Cruz County, but the location is uncertain and no other collection is known from that region.

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.

... more about "Chorizanthe douglasii"
light-brown +
globose-lenticular +
pink +  and red +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
James L. Reveal +
Bentham +
alternating +
straight +
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 /> (4 cm40 mm <br />0.04 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
oblanceolate +
0.1cm;0.4cm +
short-petiolate +
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 /> (1 cm10 mm <br />0.01 m <br />) +
deciduous +
distinct +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glandular +, woolly-floccose +, tomentose +, strigose +, villous +, hirsute +  and pubescent +
acerose +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
disarticulating +, dichotomous +, branched +  and open +
erect +  and spreading +
just below the soil surface or and above the soil surface +  and spreading +
Douglas’s spineflower +
(200-)300-1600 m +
curved +  and straight +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
white +  and pink or rose maroon or purple or yellow +
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 communities, oak and pine woodlands +
branched +  and cymose +
white;greenish or reddish +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
pubescent +  and hispid +
ventricose +  and cylindric +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
nonmembranous +
in whorls +, opposite +, alternate +  and rosulate +
deciduous +  and persistent +
bractlike +
conspicuous +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
cylindric +
accrescent +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Apr–Jul. +
homostylous +  and 3-carpellate +
Trans. Linn. Soc. London +
, +  and solid +
slender;stout +
Illustrated +  and Endemic +
not disarticulating +
decumbent to erect +  and prostrate +
prostrate +  and erect +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading +
Chorizanthe nortonii +
chambered +, , +  and solid +
Slender (?) +  and Stout (?) +
Chorizanthe douglasii +
Chorizanthe sect. Ptelosepala +
species +
denticulate +, 2-lobed +  and obovate +
coriaceous +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
shallow +
unequal +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
3 +, 2 +  and 1 +