Stylocline intertexta

Morefield

Madroño 39: 121, fig. 3. 1992.

Common names: Mojave or Morefield neststraw
Endemic
Treatment appears in FNA Volume 19. Treatment on page 453. Mentioned on page 451.

Plants 2–8 (–11) cm. Leaves acute, mucronate, longest 6–15 mm; largest capitular leaves (all) ± elliptic to ± oblanceolate (widest in distal 2/3), 4–11 × 1–2.5 mm (distalmost mainly 0.8–1.2 times head heights). Heads in ± paniculiform to cymiform, rarely dichasiform, arrays, ± spheric, largest 5–6 mm, thickly lanuginose. Phyllaries 0, vestigial, or falling, ± subulate, mostly 0.1–0.5 mm, unequal. Receptacles cylindric, 1.4–2.7 mm, heights 4–7 times diams.; scars ± evenly distributed, mamillate. Pistillate paleae: longest 3.4–4.2 mm, winged distally; wings elliptic to ovate, widest in distal 1/3 of palea lengths; bodies cartilaginous; outermost paleae ± saccate. Functionally staminate florets 3–6; ovaries vestigial, 0–0.3 mm; corollas 1.1–2.3 mm. Cypselae 1–1.4 mm, obcompressed; pappi: staminate rarely 0, usually of 1–4 (–8) smooth to barbellulate bristles 1.1–2 mm.


Phenology: Flowering and fruiting Feb–May.
Habitat: Open, stable, often calcareous desert gravels, sands, often with extra moisture (rock bases, shrub drip lines, dry drainages, depressions)
Elevation: 40–1400 m

Distribution

V19-750-distribution-map.gif

Ariz., Calif., Nev., Utah.

Discussion

Stylocline intertexta is known from the Mojave and northwestern Sonoran deserts. It combines character states of S. micropoides and S. psilocarphoides, is often sympatric with both, and appears to be stable, uniform, and reproducing independently. Stylocline intertexta shares most character states with S. micropoides. Presence of some subulate to lanceolate capitular leaves in S. micropoides helps distinguish the species in the field.

Selected References

None.

Lower Taxa

None.

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

... more about "Stylocline intertexta"
truncate-penicillate;truncate +
scarious +
mostly ovate +  and lanceovate or linear +
less paniculiform +  and cymiform +
dichasiform +
indeterminate +  and determinate +
James D. Morefield +
Morefield +
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 />) +
Mojave or Morefield neststraw +
actinomorphic +
red-tipped +, purplish +, yellow +  and whitish +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
obcompressed +
Ariz. +, Calif. +, Nev. +  and Utah. +
40–1400 m +
winged +  and beaked +
dispersed +
Open, stable, often calcareous desert gravels, sands, often with extra moisture (rock bases, shrub drip lines, dry drainages, depressions) +
singly +  and aggregated +
indeterminate +
lanuginose +
homogamous +  and heterogamous +
spheric +
largest +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
each +  and sessile +
inconspicuous +
0.4 cm4 mm <br />0.004 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
sessile +  and petiolate +
mucronate;acute +
0.6 cm6 mm <br />0.006 m <br /> (?) +  and 1.5 cm15 mm <br />0.015 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 /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
persistent +
Flowering and fruiting Feb–May. +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
paleate +  and epaleate +
4-7 times diams +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
distributed +
mamillate +
exalbuminous +
ascending +  and more or less prostrate +
2 +  and 10 +
appendaged +  and truncate +
papillate +
Compositae +
Stylocline intertexta +
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 />) +
8 cm80 mm <br />0.08 m <br /> (11 cm110 mm <br />0.11 m <br />) +
elliptic +  and ovate +