Grindelia pusilla explained

Grindelia pusilla, the little gumweed, is a North American species of flowering plants in the family Asteraceae. It is found only in the state of Texas in the south-central United States.^{[1] [2]}

Grindelia pusilla grows in open, dry sites, often disturbed. It is an annual herb up to 70cm (30inches) tall. The plant usually produces numerous flower heads in flat-topped arrays. Each head has 13-27 ray flowers, surrounding a large number of tiny disc flowers.^{[3] [4]}

Notes and References

1. http://bonap.net/MapGallery/County/Grindelia%20pusilla.png Biota of North America Program 2014 county distribution map
2. https://www.biodiversitylibrary.org/page/13062647#page/71/mode/1up Nesom, G.L. 1990. Studies in the systematics of Mexican and Texan Grindelia (Asteraceae: Astereae. Phytologia 68(4): 303–332
3. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066818 Flora of North America, Grindelia pusilla (Steyermark) G. L. Nesom, 1992.
4. https://www.biodiversitylibrary.org/page/15994749#page/479/mode/1up Steyermark, Julian Alfred. 1934. Annals of the Missouri Botanical Garden 21(3): 467