Stylocline micropoides

A. Gray

Smithsonian Contr. Knowl. 5(6): 84. 1853.

Common names: Woollyhead or desert or woollyhead fanbract
Treatment appears in FNA Volume 19. Treatment on page 452. Mentioned on page 451, 453.

Plants 2–14 (–20) cm. Leaves acute, mucronate, longest 8–20 mm; largest capitular leaves (some or all) subulate to lanceolate (widest in proximal 1/3), (7–) 11–17 × 1.5–2.5 mm (distalmost mainly 1.5–2 times head heights). Heads in ± paniculiform to cymiform, rarely dichasiform arrays, ± spheric, largest 5–9 mm, thickly lanuginose. Phyllaries 0, vestigial, or falling, ± subulate, mostly 0.1–0.5 mm, unequal. Receptacles narrowly cylindric, 2–3 mm, heights 5–8 times diams.; scars ± evenly distributed, ± flat. Pistillate paleae: longest 3.4–4.5 mm, winged distally; wings elliptic to ovate, widest in distal 1/3 of palea lengths; bodies (except midnerves) chartaceous; outermost paleae ± saccate. Functionally staminate florets 3–6; ovaries vestigial, 0–0.3 mm; corollas 1.2–1.9 mm. Cypselae 1–1.4 mm, compressed; pappi: staminate of 2–5 (–10) smooth to barbellulate bristles 1.1–2 mm. 2n = 28.


Phenology: Flowering and fruiting Feb–May(–Aug).
Habitat: Relatively stable sandy or gravelly desert soils, often under shrubs, at rock bases
Elevation: 70–1600 m

Distribution

V19-749-distribution-map.gif

Ariz., Calif., Nev., N.Mex., Tex., Utah, Mexico (Baja California), Mexico (Chihuahua), Mexico (Sonora)

Discussion

Stylocline micropoides occurs throughout warm deserts of the flora area, through the Grand Canyon to southern Utah and up Owens Valley to the White Mountains of California. Sterile and malformed natural hybrids between S. micropoides and Logfia arizonica have been seen. The description of S. micropoides by D. S. Correll and M. C. Johnston (1970) was clearly based on specimens of L. filaginoides; both species occur near El Paso, Texas.

Selected References

None.

Lower Taxa

None.

"broader" is not a number."longest" is not a number.

... more about "Stylocline micropoides"
truncate-penicillate;truncate +
scarious +
mostly ovate +  and lanceovate or linear +
less paniculiform +  and cymiform +
dichasiform +
indeterminate +  and determinate +
James D. Morefield +
A. Gray +
decurrent +
compound +  and simple +
oblanceolate;lanceolate +
muriculate +, papillate +  and smooth +
linear-lanceolate;oblanceolate +
smooth +  and barbellulate +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Woollyhead or desert or woollyhead fanbract +
actinomorphic +
red-tipped +, purplish +, yellow +  and whitish +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
compressed +
Ariz. +, Calif. +, Nev. +, N.Mex. +, Tex. +, Utah +, Mexico (Baja California) +, Mexico (Chihuahua) +  and Mexico (Sonora) +
70–1600 m +
winged +  and beaked +
dispersed +
Relatively stable sandy or gravelly desert soils, often under shrubs, at rock bases +
singly +  and aggregated +
indeterminate +
lanuginose +
homogamous +  and heterogamous +
spheric +
largest +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
each +  and sessile +
inconspicuous +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
sessile +  and petiolate +
mucronate;acute +
0.8 cm8 mm <br />0.008 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
rarely lanceovate +  and lanceolate +
2-carpellate +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
pistillate +  and winged +
erect +  and ascending +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
persistent +
Flowering and fruiting Feb–May(–Aug). +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Smithsonian Contr. Knowl. +
paleate +  and epaleate +
5-8 times diams +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
distributed +
exalbuminous +
ascending +  and more or less prostrate +
2 +  and 10 +
appendaged +  and truncate +
papillate +
Compositae +
Stylocline micropoides +
Stylocline +
species +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
14 cm140 mm <br />0.14 m <br /> (20 cm200 mm <br />0.2 m <br />) +
elliptic +  and ovate +