Lygodesmia grandiflora var. entrada

(S. L. Welsh & Goodrich) S. L. Welsh

Rhodora 95: 399. 1993.

EndemicConservation concern
Basionym: Lygodesmia entrada S. L. Welsh & Goodrich Great Basin Naturalist 40: 83, fig. 4. 1980
Treatment appears in FNA Volume 19. Treatment on page 372. Mentioned on page 371.

Plants 30–45 cm. Stems erect or ascending, stiff, woody, branched from bases and distally. Leaves: proximal blades linear-acicular, 5–30 × 2–4 mm, stiff, spreading; cauline reduced distally, not scalelike. Heads 1–10, in loose, corymbiform arrays. Involucres cylindric (V-shaped in fruit), 20–22 × 5–7 mm, apices spreading. Phyllaries ca. 6. Florets 5, corollas white (or fading to pinkish). Cypselae seldom formed (ovaries 4–5 mm, abaxial faces smooth, adaxial weakly rugose, bisulcate with ridge separating sulci). 2n = 27.


Phenology: Flowering Jun.
Habitat: Juniper-scrub community, in deep sandy soil, Entrada Sandstone
Elevation: 1300–1500 m

Discussion

Of conservation concern.

Variety entrada is distinguished by its relatively large size, stiff stems (woody) and leaves, tomentulose phyllaries, and white corollas. It is similar to var. arizonica. Unlike other varieties, it has involucre apices somewhat spreading. Chromosome counts indicate that these plants are asexual triploids (A. S. Tomb, pers. comm.). Variety entrada is locally abundant in Arches National Park, near Moab.

Selected References

None.

Lower Taxa

None.
David J. Bogler +
(S. L. Welsh & Goodrich) S. L. Welsh +
Lygodesmia entrada +
1300–1500 m +
Juniper-scrub community, in deep sandy soil, Entrada Sandstone +
Flowering Jun. +
Endemic +  and Conservation concern +
Undefined tribe Lactuceae +
Lygodesmia grandiflora var. entrada +
Lygodesmia grandiflora +
variety +