Jepson eFlora
Key to families | Table of families and genera

Key to Hesperevax

View taxon page for Hesperevax

1. Distal heads 3–5 per group, ± terminal, ± cylindric, length 1.8–2.5 × width; groups loose, subtended by generally 1–4 leaves; paleae of disk flowers 0.3–0.4 × head, tips included, ± erect ..... H. sparsiflora

2. Largest leaves 6–12(14) mm, 3–5(6) mm wide; blade ± round, woolly ..... var. brevifolia

2' Largest leaves (10)13–32 mm, 4–8(10) mm wide; blade oblanceolate to obovate, silky-cobwebby ..... var. sparsiflora

1' Distal heads 1 or (2)10–40+ per group, terminal, bell-shaped or ± obconic, length 1–1.5 × width; groups dense, subtended by 6–20 leaves; paleae of disk flowers 0.6–0.9 × head, tips exserted, spreading

3. Longest leaves (25)33–90 mm, 7–20 mm wide; petiole 2–3 × blade, base strongly thickened; heads 10–40+ per group, largest group 10–25 mm wide, subtended by (not mixed with) leaves ..... H. caulescens

3' Longest leaves 4–22(32) mm, < 5 mm wide; petiole 0–1.5 × blade, base scarcely thickened; head generally 1, distal heads rarely 2–8 per group, largest group 3–7 mm wide, mixed with leaves ..... H. acaulis

4. Stem ± erect; largest leaves (9)12–22(32) mm, 2–4(5) mm wide; longest paleae of disk flowers 2.5–3.2 mm ..... var. robustior

4' Stem ± prostrate or 0; largest leaves generally 4–12 mm, 0.5–2 mm wide; longest paleae of disk flowers 1.6–2.4 mm

5. Largest leaves generally 7–12 mm, 0.5–2 mm wide; petiole 0–0.8 × blade; blade oblanceolate, acute ..... var. acaulis

5' Largest leaves generally 4–7 mm, 1–2 mm wide; petiole generally 0.5–1.5 × blade; blade obovate to round, obtuse ..... var. ambusticola

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