Chorizanthe cuspidata var. cuspidata

Common names: San Francisco spineflower
EndemicConservation concern
Treatment appears in FNA Volume 5. Treatment on page 454. Mentioned on page 455.

Plants decumbent to prostrate, 0.5–1.5 × 0.5–10 dm. Leaf-blades 0.5–2 (–2.5) × 0.3–0.7 cm. Involucres 1–2 mm, with or without pinkish, thin, scarious margins, awns uncinate apically. Flowers 2–2.5 mm. Achenes 2–2.5 mm.


Phenology: Flowering Apr–Jul.
Habitat: Sandy places, coastal scrub communities, oak woodlands
Elevation: 0-300 m

Discussion

Of conservation concern.

Variety cuspidata is localized in the greater San Francisco area, where it is rapidly becoming rare due to increased development. No collections of San Francisco spineflower have been made in Marin or Alameda counties since 1881. Populations may still be seen in San Mateo County, but their numbers have decreased greatly since the 1950s.

Selected References

None.

Lower Taxa

None.

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

light-brown +
globose-lenticular +
cream +  and rose +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
James L. Reveal +
S. Watson +
alternating +
straight +
anterior +
uncinate +
unequal +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
scarious +
alternate +  and rosulate +
stipelike +
awn-tipped +  and simple +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
oblanceolate +
0.4cm;0.7cm +
deciduous +
distinct +
glandular +, woolly-floccose +, tomentose +, strigose +, villous +, hirsute +  and pubescent +
scale-like +
disarticulating +, dichotomous +, branched +  and open +
erect +  and spreading +
just below the soil surface or and above the soil surface +  and spreading +
San Francisco spineflower +
0-300 m +
curved +  and straight +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
white +  and pink or rose maroon or purple or yellow +
included +  and slightly exserted +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
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 places, coastal scrub communities, oak woodlands +
uniparous +, capitate +  and cymose +
greenish;reddish +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
nonmembranous +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
deciduous +  and persistent +
bractlike +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
cylindric +  and campanulate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 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 +
0.5 cm5 mm <br />0.005 m <br /> (5 cm50 mm <br />0.05 m <br />) +
acerose +, becoming narrowly elliptic +  and linear-lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Proc. Amer. Acad. Arts +
, +  and solid +
slender;stout +
Endemic +  and Conservation concern +
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 pungens var. cuspidata +
chambered +, , +  and solid +
Slender (?) +  and Stout (?) +
Chorizanthe cuspidata var. cuspidata +
Chorizanthe cuspidata +
variety +
white +  and rose +
0 +  and 1/4 +
truncate +  and 3-lobed +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
coriaceous +
shallow +
unequal +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
ascending;prostrate +
3 +, 2 +  and 1 +