Draba asprella var. stelligera

O. E. Schulz

in H. G. A. Engler, Pflanzenr. 89[IV,105]: 106. 1927.

EndemicConservation concern
Synonyms: Draba asprella var. kaibabensis C. L. Hitchcock
Treatment appears in FNA Volume 7. Treatment on page 293.

Fruit valves puberulent, trichomes 2–4-rayed, 0.1–0.2 mm.


Phenology: Flowering Apr–Jul.
Habitat: On and around limestone and sandstone rock outcrops in pine-oak and pinyon-juniper communities
Elevation: 1500-2400 m

Discussion

Of conservation concern.

Variety stelligera is known from Coconino, Gila, and Yavapai counties in northern and central Arizona. The difference between vars. kaibabensis and stelligera rests on trichome density and the proportion of simple versus branched hairs on the leaves. These features are highly variable and we find no dependable characteristics separating populations on the North Rim of the Grand Canyon from those to the south.

Selected References

None.

Lower Taxa

None.
Ihsan A. Al-Shehbaz +, Michael D. Windham +  and Reidar Elven +
O. E. Schulz +
1500-2400 m +
On and around limestone and sandstone rock outcrops in pine-oak and pinyon-juniper communities +
Flowering Apr–Jul. +
in H. G. A. Engler, Pflanzenr. +
Endemic +  and Conservation concern +
Draba asprella var. kaibabensis +
Draba asprella var. stelligera +
Draba asprella +
variety +