Chorizanthe howellii

Goodman

Ann. Missouri Bot. Gard. 21: 44, plate 3, fig. 1. 1934.

Common names: Howell’s spineflower
EndemicConservation concern
Treatment appears in FNA Volume 5. Treatment on page 456. Mentioned on page 447.

Plants spreading or decumbent to somewhat erect, 0.3–1 × 1–5 dm, villous. Leaves basal or nearly so; petiole 1–4 cm; blade spatulate to broadly obovate, 1–3 × 0.5–1.5 (–1.8) cm, villous. Inflorescences with secondary branches suppressed, greenish to grayish; bracts 2, similar to proximal leaf-blades only reduced, short-petiolate, becoming linear and aciculate at distal nodes, acerose, 1–5 cm × 5–15 mm, awns absent. Involucres 1, greenish to grayish, broadly cylindric, not ventricose, 3–4 mm, with conspicuous, white, scarious margins between teeth and extending up awn, not corrugate, pubescent; teeth spreading, equal, 0.5–1 mm, awns straight with longer ones 1–2 mm and anterior one mostly 2 mm, these alternating with shorter (0.5–1 mm) ones. Flowers exserted; perianth bicolored with floral-tube white and tepals white to rose, cylindric, (3–) 3.5–4.5 mm, pubescent nearly throughout; tepals connate 1/4 their length, dimorphic, oblong, truncate and erose to denticulate apically, those of outer lobes longer and wider than inner ones; stamens 9, included; filaments distinct, 3–4 mm, glabrous; anthers pink to red, oblong, 0.6–0.8 mm. Achenes light-brown, globose-lenticular, 3–4.5 mm. 2n = (72, 74, 76, 78), 80, (82, 84, 86, 88, 90).


Phenology: Flowering May–Jul.
Habitat: Sandy places in coastal dunes and grassland communities
Elevation: 0-20 m

Discussion

Of conservation concern.

Chorizanthe howellii is an octoploid probably derived from an ancient hybrid event involving C. cuspidata var. villosa and perhaps C. valida. It is known only from a dune area north of Fort Bragg in Mendocino County, and is federally listed as endangered.

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.

... more about "Chorizanthe howellii"
90] +, 88 +, 86 +, 84 +, [82 +, 80 +, 78] +, 76 +, 74 +  and [72 +
light-brown +
globose-lenticular +
pink +  and red +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
James L. Reveal +
Goodman +
alternating +
straight +
anterior +
unequal +
2 cm20 mm <br />0.02 m <br /> (?) +
alternate +  and rosulate +
stipelike +
awn-tipped +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
spatulate;broadly obovate +
0.5cm;1.5cm +
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 +
Howell’s spineflower +
0-20 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 places in coastal dunes and grassland communities +
uniparous +, capitate +  and cymose +
greenish;grayish +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
greenish +  and grayish +
not ventricose +  and cylindric +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
nonmembranous +
in whorls +, opposite +, alternate +  and rosulate +
deciduous +  and persistent +
nearly +  and basal +
bractlike +
denticulate +  and oblong +
longer and wider +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 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 +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering May–Jul. +
homostylous +  and 3-carpellate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Ann. Missouri Bot. Gard. +
, +  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 sect. Anisogonum +, Chorizanthe sect. Eriogonellopsis +  and Chorizanthe sect. Herbaceae +
chambered +, , +  and solid +
Slender (?) +  and Stout (?) +
Chorizanthe howellii +
Chorizanthe sect. Ptelosepala +
species +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
white +  and rose +
cylindric +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
coriaceous +
shallow +
unequal +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
erect;decumbent;spreading +
3 +, 2 +  and 1 +