common sunflower

Helianthus annuus

Member of sunflowers (genus Helianthus)
yellow sunflower-like flowers
sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
yellow in flowering plants

---

• phyllaries 13–25 mm long, generally 5–8 mm wide, abruptly acuminate
• all others have phyllaries 1–5 mm wide, acute or gradually acuminate
• leaf blade abaxially bristly
• stem ± rough-hairy

Toxicity of sunflower (Helianthus annuus):
0 – Non-toxic.

---

Chris’s observations: 2 (1 is research grade)

Locations:

• Henry Cowell Redwoods SP - Fall Creek Unit
• Saratoga, CA

Months:

• Mar.: 1
• Apr.: 0
• May: 0
• Jun.: 0
• Jul.: 1

For more details, use advanced search.

---

Taxon info: iNaturalist – Calflora – CalPhotos – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora