Lygodesmia grandiflora var. arizonica

(Tomb) S. L. Welsh

Great Basin Naturalist 43: 314. 1983.

Common names: Arizona skeletonplant
Endemic
Basionym: Lygodesmia arizonica Tomb Sida 3: 530, unnumb. fig. p. 531. 1970
Treatment appears in FNA Volume 19. Treatment on page 371. Mentioned on page 370, 372.

Plants 5–15 (–25) cm. Stems erect to ascending, sparsely branched from bases, smooth. Leaves: proximal blades narrowly lanceolate to linear, 40–100 × 2–6 mm, ± lax, glabrous; cauline not reduced to scales (mostly 10+ mm). Heads 2–6, borne singly. Involucres cylindric, 18–25 mm × 5–7 mm, apices narrow. Phyllaries 5–6. Florets 5 (–7); corollas pale-pink to white. Cypselae 10–13 mm, abruptly narrowed below apex, faces rugose, adaxial strongly sulcate. 2n = 18.


Phenology: Flowering May–June.
Habitat: Arid grasslands on sandy soils
Elevation: 1100–1600 m

Distribution

V19-595-distribution-map.gif

Ariz., Colo., N.Mex., Utah.

Discussion

Variety arizonica is identified by its relatively short size (rarely over 20 cm), branched, leafy stems, and reduced or absent phyllary apical appendages.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

narrowed +
scarious +
ovate +  and lanceolate +
indeterminate +  and determinate +
David J. Bogler +
(Tomb) S. L. Welsh +
0.5 cm5 mm <br />0.005 m <br /> (15 cm150 mm <br />0.15 m <br />) +
linear +  and subulate +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
decurrent +
Lygodesmia arizonica +
compound +  and simple +
linear;subulate +
reduced +
tuberculate +, rugose +, muricate +  and smooth +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
filiform +
not reduced +
Arizona skeletonplant +
zygomorphic +, actinomorphic +  and (3-)5-merous +
pale-pink +  and white +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
pale green +  and tan +
Ariz. +, Colo. +, N.Mex. +  and Utah. +
1100–1600 m +
glabrous +, puberulent +  and tomentulose +
winged +  and beaked +
dispersed +
Arid grasslands on sandy soils +
indeterminate +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
cauline +  and basal +
5mm;10mm +
lobed +  and entire +
2-carpellate +
white +  and tawny +
persistent +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Flowering May–June. +
connate +  and distinct +
subequal +  and unequal +
1.5 cm15 mm <br />0.015 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
lanceolate to linear +  and lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Great Basin Naturalist +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
erect +  and ascending +
tomentulose +  and glabrous +
1 +  and 5 +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Lygodesmia grandiflora var. arizonica +
Lygodesmia grandiflora +
variety +
taprooted +  and rhizomatous +
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +