Botanical name: Grindelia robusta Nutt. Synonyms: none Family: Asteraceae Origin: United States, Mexico Common name: grindelia, grindelia Hardiness: -8°C ? UICN Red List: no Grindelia robusta is a perennial whose stems can reach 1 m in height when in bloom. The daisy-like flowers are yellow and appear in summer. The bud is sticky, covered with a white resin. It likes the seaside, sand, rocks and fairly dry soil. It is used as a medicinal plant (antiasthmatic, antispasmodic, expectorant and cardiotonic). For further information: https://jardinage.lemonde.fr/dossier-1883-grindelia-soigner-sphere-orl.html