Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

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

Cirsium ochrocentrum, Yellowspine Thistle

Chamaesyce hyssopifolia, Hyssopleaf Sandmat

Chamaesyce hyssopifolia, Hyssopleaf SandmatChamaesyce hyssopifolia, Hyssopleaf SandmatChamaesyce hyssopifolia, Hyssopleaf SandmatChamaesyce hyssopifolia, Hyssopleaf Sandmat

Scientific Name: Chamaesyce hyssopifolia
Common Name: Hyssopleaf Sandmat
Also Called: Hyssop Spurge, Leafy Spurge; (Spanish: Golondrina)
Family: Euphorbiaceae, Spurge or Euphorbias Family
Synonyms: (Anisophyllum hyssopifolium, Chamaesyce brasiliensis, Euphorbia brasiliensis, Euphorbia hyssopifolia)
Status: Native
Duration: Annual or Perennial
Size: Up to 8 inches or more.
Growth Form: Herbaceous forb/herb; sub-erect or ascending, glabrous, slender branching stems from base, red or green, milky sap, poisonous.
Leaves: Light green; opposite, finely serrated, leaf longer than wide, about ½ inch long, large spaces between leaves, asymmetrical at base, glabrous.
Flower Color: White petaloid small appendages, mostly glabrous, inflorescence resembles a "flower", flowers clustered from axils, actual flowers small or inconspicuous, monecious, botanically the "flower" is a cyathium; fruit a glabrous capsule.
Flowering Season: August to November.
Elevation: 1,000 to 6,000 feet.
Habitat Preferences: Sandy areas
Recorded Range: Hyssopleaf Sandmat may be found growing naturally in the southern most United States in the border states of: AL, AR, AZ, FL, GA, HI, LA, MD, MS, NC, NM, SC, TX and the interior states of AR and UT. In Arizona, it is found in the northern, central and southern parts of the state.

U.S. Weed Information: No information available.
Invasive/Noxious Weed Information:No information available.
Wetland Indicator:In North America Chamaesyce hyssopifolia is included on the USDA 2012 National Wetland Plant List as a: Facultative (FAC) and Facultative Upland (FACU) species.
FAC, Facultative, occur in wetlands and non-wetlands br>FACU, Facultative Upland, usually occur in non-wetlands, but may occur in wetlands.
Threatened/Endangered Information: No information available.

Genus Information: Over 90 species in Chamaesyce in the United States, Canada and Mexico. World-wide over 440 species. Approximately 39 species in Arizona, statewide. Note: Taxonomists appear to be moving toward reclassification of Chamaesyce to Euphorbia, its former classification.

Comments: Hyssopleaf Sandmat is one of the most common sandmats in the southernmost United States. Keen observers in cities, towns and other urban areas will quickly recognize this non-aggressive "weed" species perhaps from their own yard. It is a striking rather handsome looking plant with its slim red or green nodding stems, bright green leaves outlined with attractive serrated margins and small but showy “flowers” and fruits.

In Southwest Desert Flora also see: Whitemargin Sandmat, Chamaesyce albomarginata; Arizona Sandmat, Chamaesyce arizonica; Head Sandmat, Chamaesyce capitellata; Royal Sandmat, Chamaesyce dioica; Chiricahua Mountain Sandmat, Chamaesyce florida; Red-gland Sandmat, Chamaesyce melanadenia; Carrizo Mountain Sandmat, Chamaesyce pediculifera; Threadstem Sandmat, Chamaesyce revoluta and Yuma Sandmat, Chamaesyce setiloba.

Date Profile Completed: 5/16/2015, 05/23/2015
References:
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, California, as Euphorbia hyssopifolia.
Native Plant Information Network, NPIN (2013). Published on the Internet http://www.wildflower.org/plants/ [accessed: 5/16/2015]. Lady Bird Johnson Wildflower Center at The University of Texas, Austin, TX.
http://www.wildflower.org/plants/result.php?id_plant=CHHY3
SEINet for synonyms, scientific names and recorded geographic locations, http://swbiodiversity.org/seinet/. br>USDA – Wetland species information:
Arid West, FACU;
Atlantic and Gulf Coastal Plain, FAC;
Eastern Mountains and Piedmont, FAC;
Great Plains, FACU and
Western Mountains, Valleys, and Coast, FACU