Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Psathyrotes ramosissima, Velvet Turtleback

Velvet Turtleback is an interesting plant with plenty of character in its size, shape and texture. It has tiny pale yellow disk flowers only. The plants bloom from March to June, again in December or perhaps year around when conditions are met. Psathyrotes ramosissima Velvet Turtleback has greenish-gray hairy foliage, deeply textured and with conspicuous veins throughout. Plants are limited in distribution to the southwestern United States in AZ, CA, NV and UT. Psathyrotes ramosissima Velvet Turtleback or Turtleback grows up to about 1 foot or so, much larger in California where it may be 15 inches around or so. The plants prefer elevations from 1,500 to 3,500 feet and varied habitats in the plains, mesas, gravelly or sandy soils all in desert creosote-bush scrub. Psathyrotes ramosissima Velvet Turtleback seems to have a preference to the Mojave Desert but its populations extend eastward into the Sonoran Desert. Plants are dense, much branched, hairy and scaly and have a turpentine-like odor about them. Psathyrotes ramosissima

Scientific Name: Psathyrotes ramosissima
Common Name: Velvet Turtleback

Also Called: Desert Velvet, Turtleback, Velvet Cushion

Family: Asteraceae, Sunflower Family

Synonym (Tetradymia ramosissima)

Status: Native

Duration: Annual or perennial.

Size: 1 to 12 inches (3-30 cm) or more; 18 inches (46 cm)

Growth Form: Forb/herb, subshrub; generally low growing, compact rounded plants; plants wide spreading to upright (erect); multiple branches; covered with rough downy short soft erect hairs (pubescence).

Leaves: Greenish to brownish to gray- or pale-green; leaves round to triangular-rounded; leaves on long supporting stalk (petiole); leaves with velvet-like surface from woolly fibers and shiny hairs; leaf edges (margins) with round teeth; leaves arranged alternately along stem.

Flower Color: Yellow, pale yellow; flower heads solitary on a short flowering stalk; flower heads with disk florets only; bracts surrounding flower heads are velvety or woolly gray-green in color; fruit is a cypsela with large pappus.

Flowering Season: March to June or periodically throughout the year depending on rainfall.

Elevation: Below 3,500 feet (1,067 m)

Habitat Preferences: Plains, mesas, desert pavements, gravelly or sandy soil and sandy creosote-bush (Larrea) scrub communities.

Recorded Range: Velvet Turtleback is relatively rare in the United States where it is limited in distribution to the southwestern states of AZ, CA, NV, UT. The largest populations are in southeast CA, other large populations in western AZ and southern UT. It is also native to northern Baja California and far northwest Mexico, Sonora.

North America & US County Distribution Map for Psathyrotes ramosissima.

North America species range map for Velvet Turtleback, Psathyrotes ramosissima:

North America species range map for Velvet Turtleback, Psathyrotes ramosissima: Click image for full size map.
Click image for full size map

U.S. Weed Information: Unknown
Invasive/Noxious Weed Information: Unknown
Wetland Indicator: Unknown
Threatened/Endangered Information: Unknown

Genus Information: In North America there are 3 species and 3 accepted taxa overall for Psathyrotes. Worldwide, The Plant List includes 5 accepted species names and a further 3 scientific names of infraspecific rank for Psathyrotes.

The genus Psathyrotes was published in 1853 by Asa Gray, (1810-1888).

In the Southwestern United States: Arizona, Nevada and Utah each have 3 species of genus Psathyrotes, California has 2 species, New Mexico and Texas each have 1 species. Data approximate and subject to revision.

Comments: The common names "Velvet Turtleback" and "Turtleback" have to do with the appearance of the plants that somewhat resembles that of a turtles back. You can see from the photos above that this is a very unique plant.

Importance to Wildlife, Birds and Livestock
Psathyrotes ramosissima tiny but showy yellow brightly colored flowers, and their seeds and plants may be visited by hummingbirds and/or small mammals including rodents and granivorous birds in search of food, nectar, shelter and protection through cover.

Beneficial Value to Butterflies, Bees and Insects
Psathyrotes ramosissima tiny but showy yellow brightly colored flowers, and their plants may be visited by butterflies, moths, native bees and other insects in search of nectar and/or other food.

Etymology:
The genus “Psathyrotes” is Greek from ‘psathyros’ meaning “fragile.”

The genus Psathyrotes was published in 1853 by Asa Gray, (1810-1888).

The species epithet ramosissima from Latin ‘ramus’ meaning “branch, bough or limb” and ‘-osus’ or an “abundance of”; thus having many branches.

Psathyrotes ramosissima has been used for a variety of purposes by southwestern United States indigenous peoples.

  • Paiute Drug, Analgesic, Antidiarrheal, Cathartic, Dermatological Aids, Emetic; Decoction of plant used as a head wash for headaches and Decoction of plant taken for diarrhea and Decoction of plant taken as a physic and Compound poultice of crushed plants applied to draw boils and embedded slivers and Compound poultice of plant applied to sores, cuts, swellings and insect bites and Decoction of plant taken as an emetic.
  • Paiute Drug, Gastrointestinal Aid, Laxative, Liver Aid, Snake Bite Remedy, Toothache Remedy, Venereal Aid; Decoction of plant taken for stomachaches, bowel disorders and biliousness and Decoction of plant taken for constipation and Decoction of plant taken for liver trouble and Poultice of crushed, green plant or moistened dried plant used on snakebites and Dry bits chewed for toothache and Decoction of plant taken for venereal diseases.
  • Shoshoni Drug, Analgesic, Antidiarrheal, Cathartic, Cough Medicine, Dermatological Aids; Decoction of plant used as a head wash for headaches and Decoction of plant taken for diarrhea and Decoction of plant taken as a physic and Decoction of plant taken for tubercular cough and Compound poultice of crushed plants applied to draw boils and embedded slivers and Compound poultice of plant applied to sores, cuts, swellings and insect bites.
  • Shoshoni Drug, Emetic, Gastrointestinal Aid, Laxative, Liver Aid, Snake Bite Remedy, Tuberculosis Remedy, Venereal Aid; Decoction of plant taken as an emetic and Decoction of plant taken for stomachaches, bowel disorders and biliousness and Decoction of plant taken for constipation and Decoction of plant taken for liver trouble and Poultice of crushed, green plant applied to snakebites and Decoction of plant taken for tubercular cough and Decoction of plant taken for venereal diseases.

  • See complete listing of ethno-botanical uses at Native American Ethnobotany, University of Michigan, Dearborn.

    Date Profile Completed: 04/22/2017; updated 10/01/2020
    References:
    Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, California.
    U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search; accessed 10/01/2020.
    https://plants.usda.gov/core/profile?symbol=PSRA
    https://plants.usda.gov/java/ClassificationServlet?source=profile&symbol=PSATH&display=31
    The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/; accessed 10/01/2020.
    http://www.theplantlist.org/1.1/browse/A/Compositae/Psathyrotes/
    Native Plant Information Network, NPIN (2013). Published on the Internet http://www.wildflower.org/plants/; accessed 10/01/2020. Lady Bird Johnson Wildflower Center at The University of Texas, Austin, TX.
    https://www.wildflower.org/plants/result.php?id_plant=PSRA
    John L. Strother, Flora of North America; Asteraceae; Psathyrotes, 1. Psathyrotes ramosissima (Torrey) A. Gray, Proc. Amer. Acad. Arts. 7: 363. 1868. Flora of North America North of Mexico. 16+ vols. New York and Oxford.
    Bruce G. Baldwin, adapted from Strother (2006) 2012, Psathyrotes ramosissima, in Jepson Flora Project (eds.) Jepson eFlora, /eflora/eflora_display.php?tid=4487, accessed on October 01, 2020.
    Wikipedia contributors, 'Psathyrotes ramosissima', Wikipedia, The Free Encyclopedia, 9 August 2020, 14:46 UTC,
    https://en.wikipedia.org/w/index.php?title=Psathyrotes_ramosissima&oldid=971988372 [accessed 1 October 2020]
    Baldwin 2014 (Jepson Online), FNA 2006, Kearny and Peebles 1979; Editors: A.Hazelton 2015; from SEINet Field Guide, on-line; accessed 09/30/2020.
    https://swbiodiversity.org/seinet/taxa/index.php?taxon=2290
    Seiler, John, Peterson, John, North American species range map courtesy of Virginia Tech, Dept. of Forest Resources & Environmental Conservation
    http://dendro.cnre.vt.edu/dendrology/
    SEINet synonyms, scientific names, geographic locations, general information.
    http://swbiodiversity.org/seinet/
    IPNI (2020). International Plant Names Index. Published on the Internet http://www.ipni.org, The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries and Australian National Botanic Gardens. [Retrieved 01 Octtober 2020].
    https://www.ipni.org/n/10695-1