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Xanthocephalum gymnospermoides (Gummy broomweed)
Bransford, W.D. and Dolphia

Xanthocephalum gymnospermoides

Xanthocephalum gymnospermoides (A. Gray) Benth. & Hook. f.

Gummy Broomweed, San Pedro Matchweed, Gummy Snakeweed

Asteraceae (Aster Family)

Synonym(s): Grindelia gymnospermoides, Gutierrezia gymnospermoides


USDA Native Status: L48 (N)

Gummy Broomweed grows 2-5 feet tall, with several branches in the upper section. It has a sticky, gummy secretion on the bright golden flower heads, sometimes completely covering the large center, which is 3/8 inch across. The ray flowers are short, only 1/8 inch long. There are about 20 flower heads to a stem, and they are quite showy when growing in dense masses.

The stems are often used to kindle fires because of the resin they contain.


From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Herb
Size Notes: Up to about 5 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: Yellow
Bloom Time: Jul , Aug , Sep , Oct




Conspicuous Flowers: yes
Deer Resistant: High

National Wetland Indicator Status

Status: FAC
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Wildflower Center Seed Bank

LBJWC-1136 Collected 2007-10-18 in Jeff Davis County by Lady Bird Johnson Wildflower Center

1 collection(s) available in the Wildflower Center Seed Bank


Bibref 248 - Texas Wildflowers: A Field Guide (1984) Loughmiller, C. & L. Loughmiller

Search More Titles in Bibliography

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Xanthocephalum gymnospermoides in USDA Plants
FNA: Find Xanthocephalum gymnospermoides in the Flora of North America (if available)
Google: Search Google for Xanthocephalum gymnospermoides


Record Modified: 2023-01-30
Research By: TWC Staff

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