Jepson eFlora
Key to families | Table of families and genera

Key to Madia

View taxon page for Madia

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

1. Paleae readily falling; ray fruit beaked, beak adaxially offset, curved; ray 6–19 mm; anthers yellow to ± brown ..... M. radiata

1' Paleae mostly persistent; ray fruit generally beakless or beak indistinct (if beaked, then ray <= 1 mm); ray 0.7–20 mm or rays 0; anthers ± dark purple or yellow to ± brown

2. Heads showy or not; disk flowers staminate, fruit 0, ovary wall remaining pale, membranous

3. Ray green-yellow, 4–11 mm; anthers ± dark purple; ray fruit ± widely 3-angled, abaxially broadly rounded, adaxially 2-faced, angles between those faces ± 70°, faces glossy ..... M. citriodora

3' Ray bright yellow, often maroon at base, 4–20 mm; anthers yellow to ± brown or ± dark purple; ray fruit compressed, abaxially slightly rounded, adaxially 2-faced, angles between those faces 15–45°, faces dull or glossy ..... M. elegans

2' Heads not showy; disk flower bisexual, forming fruit, ovary wall becoming dark, rigid

4. Heads generally tightly grouped, occasionally in flat-topped or panicle-like clusters; involucre narrowly ovoid or ellipsoid; ray flowers 0 or 1–3 ..... M. glomerata

4' Heads in crowded or open, flat-topped, panicle-, raceme-, or spike-like clusters; involucre ± spheric, (ob)ovoid, or urn-shaped; ray flowers (1)3–13(14)

5. Anthers yellow to ± brown; stem 1–30(60) cm; phyllary glands ± yellow; phyllary tips ± erect, often grooved along midvein

6. Heads in open, flat-topped or raceme- or panicle-like clusters; peduncle ± thread-like; involucre 2.5–5 mm, depressed-spheric; disk flowers 1(2), corolla glabrous; ray fruit black or brown, beaked, beak adaxially offset, curved ..... M. exigua

6' Heads in narrow raceme- or spike-like clusters; peduncle 0 or length generally < 2 × head; involucre 6–8 mm, spheric or ovoid; disk flowers 5–15, corolla hairy; ray fruit occasionally purple-mottled, beak 0 ..... M. subspicata

5' Anthers ± dark purple; stem (0.3)6–100(240) cm; phyllary glands black, purple, or yellow; phyllary tips erect or reflexed, flat

7. Ray fruit black or purple, round in ×-section, glossy ..... M. anomala

7' Ray fruit black, brown, purple, or mottled, compressed, dull or glossy

8. Stem glandular-hairy throughout; heads in raceme-, panicle-, or spike-like clusters; involucre 6–16 mm; often coastal ..... M. sativa

8' Stem distally glandular-hairy; heads in flat-topped, raceme-, or panicle-like clusters; involucre 5–10 mm; mostly away from immediate coast

9. Lateral branches often exceeding main stem in large plants; ray 6–8 mm ..... M. citrigracilis

9' Lateral branches seldom exceeding main stem; ray 1.5–8 mm ..... M. gracilis


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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