Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

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

Cirsium ochrocentrum, Yellowspine Thistle

Harpagonella palmeri, Palmer's Grapplinghook

Harpagonella palmeri, Palmer's Grapplinghook, Southwest Desert Flora Harpagonella palmeri, Palmer's Grapplinghook, Southwest Desert Flora Harpagonella palmeri, Palmer's Grapplinghook, Southwest Desert Flora

Scientific Name: Harpagonella palmeri
Common Name: Palmer's Grapplinghook
Also Called: Palmer's Grappling-hook
Family: Boraginaceae, Forget-Me-Not Family
Synonyms: (Pectocarya palmeri)
Status: Native.
Duration: Annual
Size: Up to 12 inches, usually smaller.
Growth Form: Forb/herb; erect or ascending, herbage with spiny or bristly hairs.
Leaves: Green; linear or lanceolate, strong mid-line, rolled-under or revolute, hairy or bristly.
Flower Color: White, bright white, flowers in leaf axils on tips of branches, fruit on twisted pedicel (stem) (see photo above), spiny fruit is a nutlet.
Flowering Season: February to April.
Elevation: Below 3,500 feet.

Habitat Preferences: Gravelly slopes and benches in Creosote communities.

Recorded Range: Palmer’s Grapplinghook is rare in the United States. It’s populations are limited to central and southern Arizona and southern California. Also found in northern and central Baja California and northwest Mexico.

U.S. Weed Information: No data listed.
Invasive/Noxious Weed Information: No data listed.
Wetland Indicator: No data listed.

Threatened/Endangered Information: California Native Plant Society (CNPS) has placed Harpagonella palmeri in California Rare Plant Rank 4: Plants of Limited Distribution - A Watch List.

Genus Information: 1 species in Harpagonella the United States and Arizona.

2 varieties in Harpagonella palmeri:
Harpagonella palmeri var. arizonica, Arizona Grapplinghook (AZ only) and
Harpagonella palmeri var. palmeri, Palmer's Grapplinghook (CA, possibly AZ).

Comments: Palmer’s Grapplinghook is a small diminutive plant distinguished from similar looking Borages by strange looking fruits certainly resembling "grappling" hooks. They are relatively common in central Arizona but the California Native Plant Society considers this species as fairly threatened because of their limited distribution.

Date Profile Completed: 1/6/2015, 07/20/2015, updated format 10/11/2017
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database – ITIS search
Arizona Flora, Kearney, Thomas H., Peebles, Robert H., 1960, University of California Press, Berkley and Los Angeles, California.
California Native Plant Society (CNPS); Harpagonella palmeri classified as 4.2-Fairly threatened in California (20-80% occurrences threatened / moderate degree and immediacy of threat)[www. rareplants. cnps. org/detail/234. html] - Accessed 1/6/2015
1993, The Jepson Manual, Citation: ttp:// (accessed 1/6/2015)
SEINet for synonyms, scientific names and recorded geographic locations,