Key to Hesperevax

View taxon page for Hesperevax

(For a list of species in Hesperevax, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Distal heads 3–5 per group, ± terminal, ± 

cylindric 

Elongate, with parallel sides and, at any point, round in transverse section.

, length 1.8–2.5 × width; groups loose, subtended by generally 1–4 leaves; paleae of disk flowers 0.3–0.4 × 

head 

1. A dense, often spheric inflorescence of sessile or subsessile flowers.
2. In Asteraceae and some other groups, a head-like inflorescence is one in which sessile or subsessile inflorescence units (e.g., heads in Asteraceae, umbels enclosed by involucres in Eriogonum), instead of individual flowers, are attached in a short dense cluster without an evident axis or branches.

, tips 

included 

Not protruding out of surrounding structure(s) (e.g., stamens included in corolla).

, ± 

erect 

Upright; vertically oriented.

..... H. sparsiflora

2. Largest leaves 6–12(14) mm, 3–5(6) mm wide; 

blade 

Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped.

± 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 

Protruding out of surrounding structure(s) (e.g., stamens exserted from corolla).

, 

spreading 

Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal.

3. Longest leaves (25)33–90 mm, 7–20 mm wide; 

petiole 

Leaf stalk, connecting leaf blade to stem; sometimes more or less indistinct.

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 

Lying flat on the ground.

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 

Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle.

..... 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 

Having a short-tapered, blunt tip or base, the sides convex or straight and converging at more than a right angle.

..... var. ambusticola

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