Jepson eFlora
Key to families | Table of families and genera

Key to Grindelia

View taxon page for Grindelia

1. Leaves crenate, each tooth with a distinct, ± yellow bump near tip ..... G. squarrosa var. serrulata

1' Leaves entire or serrate; if serrate, ± yellow bump near tip of teeth 0;

2. Plants of dunes, salt marshes, coastal bluffs, tidal flats, sloughs; leaves ± fleshy; North Coast to South Coast, deltaic Great Central Valley (Suisun)

3. Stems woody in proximal 3–15 dm, erect; phyllaries appressed to head except for short, erect tips, tip < 3 mm long; tidal wetlands; Central Coast (San Francisco Bay) ..... G. stricta var. angustifolia

3' Stems herbaceous or woody in proximal 0–1 dm, erect, decumbent, or prostrate; phyllaries generally spreading, recurved, or coiled; widespread

4. Stems erect, 6–20 dm; salt marshes, sloughs

5. Leaves on flowering stems generally widest at base or of ± equal width throughout; Deltaic Great Central Valley (Suisun) ..... G. ×paludosa

5' Leaves on flowering stems generally widest at rounded tip or ± equally wide at tip and base but narrower in middle of leaf; North Coast ..... G. stricta var. stricta (2)

4' Stems prostrate, decumbent, or erect, if erect, stems 1–6 dm; dunes, coastal bluffs

6. Plants decumbent or erect; leaves generally sessile, sometimes clasping stems, ± same width throughout or widest near base; North Coast to South Coast, Channel Islands ..... G. stricta var. platyphylla

6' Plants decumbent; leaves generally tapered to petioles, widest at rounded tip; North Coast ..... G. stricta var. stricta (2)

2' Plants of fields, grassland, woodland, serpentine soils, disturbed areas, or interior wetlands; leaves not fleshy; widespread (absent from Suisun delta)

7. Phyllaries flattened throughout, gradually tapered to tips; phyllary tips erect; plants generally ± hairy

8. Heads 7–10 mm diam; rays 8–9 mm; Peninsular Ranges (San Diego Co.) ..... G. hallii (2)

8' Involucres 7–25 mm diam; rays 8–20 mm; North Coast Ranges, Great Central Valley, Central Western California, South Coast, Transverse Ranges ..... G. hirsutula

7' Phyllaries flattened only at bases, rounded in ×-section distally, abruptly narrowed to tips; phyllary tips spreading, reflexed, or coiled; plants generally glabrous

9. Heads ± obconic; e Mojave Desert, wet clay of meadows, woodland borders ..... G. fraxinipratensis

9' Heads bell-shaped or hemispheric, widening abruptly at the base; widespread

10. Phyllaries appressed to head for > 3/4 length, reflexed or coiled portion < 3 mm; Peninsular Ranges (San Diego Co.) ..... G. hallii (2)

10' Phyllaries appressed to head for < 1/2 length, spreading, reflexed, or coiled portion > 5 mm; widespread

11. Outer phyllaries reflexed, curved, or coiled < 270° ..... G. camporum (2)

11' > 75% of phyllaries coiled or recurved 270–360° or more

12. Plants 6–25 dm; mature involucre bell-shaped to hemispheric, 15–22 mm diam; San Joaquin Valley, South Coast (geog subset of sp.) ..... G. camporum (2)

12' Plants 1–5 dm; mature involucre bell-shaped, 7–12 mm diam; Cascade Range, Modoc Plateau ..... G. nana


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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