Atriplex Hymenelytra

''Atriplex hymenelytra'', the desert holly, is silvery-whitish-gray shrub in the family Amaranthaceae, native to deserts of the southwestern United States.Wildflowers of the Sonoran Desert, Richard Spellenberg, 2nf ed, 2012, Mojave Desert Wildflowers, Pam Mackay, 2nd ed. It is the most drought tolerant saltbush in North America. It can tolerate the hottest and driest sites in Death Valley, and remains active most of the year.

The common name refers to the leaves that are shaped similar to holly, but the plants are not related. The toothed leaves and the small reddish fruits borne on the plant give it a passing resemblance to the unrelated European holly.

Range and habitat

Desert holly grows in alkaline locations such as desert dry wash and creosote bush scrub in the Mojave Desert and Sonoran Desert down to Baja California.http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?3084,3089,3112 Jepson In the Sonoran Desert it grows in northwestern Mexico, western Arizona, and southeastern California to southwestern Utah, and can be found at elevations ranging from .

With dry soil, it can survive temperatures as low as ; however, it dies if the ground freezes.Atriplex hymenelytra, Las Pilitas Nursery
/ref>

Description

Growth pattern

Atriplex hymenelytra is generally a compact, rounded bush, tall, covered in distinctive reflective silver-gray, twisted, oblong, many-pointed leaves. It drops its leaves drought deciduous in extreme drought conditions.

It tolerates alkaline soil, salt and sand. The leaves accumulate salts which helps extract water from the soil when other plants cannot. Salt is shed by dropping the leaves. It can live in up to 30 ppm Boron in solution, compared to most plants which can tolerate only about 1-5 ppm. As with other desert climate members of the genus '' Atriplex'', it uses water conserving C4 photosynthesis, and it removes salts by having bladders in the leaves that keep the salt from the plant cells.

Roots, stems, and leaves

Oval to round, , silvery-gray leaves have a whitish reflective coating of tiny gray to white scales, and are shaped like twisted or wavy holly leaves, with toothed margins. The silvery color is from salts that collect on surface hairs. This helps reflect the light and therefore reduce the amount of water lost.

Inflorescence and fruit

It blooms from January to April in the Sonoran Desert.

Plants are either male or female in their natural dry, desert habitat. When artificially transplanted to cooler and wetter climates, male and female flowers may occur on the same plant.

Female flowers are green.

Green or red fruits occur in dense clusters enclosed in disc-shaped leaf-like bracts, with the 2 round bracteoles pressed together, after flowering.

Ecology

Human uses

Plants were once used as Christmas decorations by drying and dying them. The plants are not a protected species in most habitats.

References

External links

Jepson Manual Treatment - ''Atriplex hymenelytra''USDA Plants Profile: ''Atriplex hymenelytra''''Atriplex hymenelytra'' - Photo gallery
- ''U.C.CalPhotos''

{{Taxonbar, from=Q4817592

hymenelytra
North American desert flora
Flora of the California desert regions
Flora of the Sonoran Deserts
Flora of Arizona
Flora of Baja California
Flora of Baja California Sur
Flora of California
Flora of Nevada
Flora of Utah
Flora of Sonora
Death Valley National Park
Natural history of the Colorado Desert
Natural history of the Mojave Desert
Flora without expected TNC conservation status