Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Iridaceae

View taxon page for Iridaceae


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

1. Style branches petal-like, conspicuous,  stamens; outer perianth parts (sepals) unlike inner (petals); stamens free ..... IRIS

1' Style branches thread-like, not conspicuous, generally  stamens; outer perianth parts ± like inner; stamens free or united at base

2. Flowers in umbel-like 

3. Perianth parts not alike, outer sepal-like, white adaxially, ± green abaxially, inner petal-like, generally white ..... [Libertia formosa]

3' Perianth parts ± alike, red-purple to magenta or ± blue, violet, yellow, occasionally pink or white

4. Stem not winged; perianth red-purple to magenta, occasionally pink or white, generally 18–33 mm; filaments fused ± in  1/2 ..... OLSYNIUM

4' Stem winged; perianth red-purple, ± blue, violet, yellow (white), generally < 18 mm; filaments ± completely free to ± completely fused ..... SISYRINCHIUM

2' Flowers not in umbel-like cymes

5. Flowers 1 on ; plant generally < 10 cm; leaves attached below ground, ± round to widely  in ×-section, generally 4-grooved ..... ROMULEA

5' Flowers in spikes or  of spikes; plant generally > 20 cm; leaves attached below and above ground, flat with prominent midvein or cross-shaped in ×-section

6. Style branches divided ± to middle

7. Flower stem bent ± 90° below lowest flower,  1-ranked;  axils without  after flower ..... [Freesia leichtlinii subsp. alba]

7' Flower stem , spike 2-ranked; leaf axils with bulblets after flower or not ..... WATSONIA

6' Style branches  or notched at tip

8. Flower bracts membranous or papery and crinkled, outer 3-lobed to -toothed or often cut into lance-linear segments in upper 1/2 or at tip, inner 2-lobed or -toothed

9. Flower bracts membranous, outer 3-lobed to -toothed; stamens attached at mouth ..... [Ixia maculata]

9' Flower bracts papery, crinkled, outer often cut into lance-linear segments in upper 1/2 or at tip; stamens attached in tube ..... [SPARAXIS]

8' Flower bracts green, soft or leathery, outer entire, inner notched at tip

10. Perianth tube abruptly enlarged above base,  unequal, upper 1 > lower 5; inflorescence generally an erect spike (panicle) ..... CHASMANTHE

10' Perianth tube not abruptly enlarged above base, lobes subequal; inflorescence generally an arched spike or  of spikes ..... CROCOSMIA


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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

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

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