Jepson eFlora
Key to families | Table of families and genera

Key to Madia

View taxon page for Madia

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

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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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