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1
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Plants 0.9–1.2 m high; perianth tube funnel-shaped with flared upper portion ± 2 mm long and ± as long as filiform lower half; style dividing opposite middle of filaments
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Ixia altissima
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+
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Plants 0.2–0.6 m high; perianth tube cylindric almost throughout, flared only in upper 0.5–1.0 mm if at all; style dividing opposite or just above bases of filaments
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(2)
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2 (1)
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Flowers radially symmetric, upright to half nodding; stamens erect with anthers parallel or diverging
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(3)
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+
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Flowers facing to side or sometimes inclined; stamens unilateral with anthers held horizontally or pendent:
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(11)
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3 (2)
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Perianth tube very short, 2.0–2.5 mm long; stem with short, stiffly erect lateral branches held close to main axis, each with up to 8 flowers
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Ixia rigida
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+
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Perianth tube 2.5–6 mm long; stem simple or with 1(–several) suberect to spreading branches
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(4)
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4 (3)
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Leaves ± terete or filiform, rarely more than 1 mm wide,; corm tunics of fine fibres extending upward in a collar around the stem base
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(5)
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+
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Basal and sometimes other leaves linear to sword-shaped or lanceolate, usually at least 1.5 mm wide, blades plane with main vein and sometimes multiple veins ± equally prominent; corm tunics fine to coarse-textured, with or without fibrous collar around the stem base
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(6)
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5 (4)
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Style branches straight and extending outward below anthers, 3–5 mm long; filaments filiform; outer floral bracts with 3 main veins and several secondary veins, acutely 3-toothed
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Ixia micrandra
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Style branches falcate, recurved at tips, up to 2 mm long; filaments flattened and wider in middle; outer floral bracts with 3 main veins but lacking secondary veins, usually shallowly 3-toothed or 3-lobed
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Ixia minor
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6 (4)
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Anthers 4–5 mm long, oblong and > twice as long as wide; spike nodding in bud, becoming erect as flowers open
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(7)
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+
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Anthers 1.5–3.0 mm long, suborbicular to broadly oblong and < twice as long as wide; spike erect in bud
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(8)
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7 (6)
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Anthers yellow; perianth pink, tepals darker at base and yellow in throat; foliage leaves (2.5–)5–12 mm wide; style branches 4–5 mm long
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Ixia trifolia
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+
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Anthers purple; perianth light purple with small dark centre; foliage leaves 1.5–2.0 mm wide; style branches up to 2 mm long
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Ixia brevituba
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8 (6)
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Leaves 2, basal leaf with expanded, ± lanceolate blade, upper leaf entirely sheathing
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(9)
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+
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Leaves 2–4, with no visible veins or only main vein prominent
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(10)
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9 (8)
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Basal leaf with 3 ± equally prominent, thickened veins; style branches falcate to recurved (white drying ± white); tepals 12–15 × 6–8 mm when fully open; spike mostly 7–12-flowered
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Ixia trinervata
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+
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Basal leaf with 1 prominent vein (translucent when alive, appearing raised when dry); style branches ascending, ± straight (pink, often drying purple); tepals remaining slightly cupped, 12–14 × 5–7 mm; spike mostly 4–7-flowered Basal leaf with 1 prominent vein (translucent when alive, appearing raised when dry); style branches ascending, ± straight (pink, often drying purple); tepals remaining slightly cupped, 12–14 × 5–7 mm; spike mostly 4–7-flowered
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Ixia bifolia
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10 (8)
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Leaves (3)4 or 5, often drying at anthesis; foliage leaf blades lanceolate, mostly 4–9 mm wide
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Ixia stricta
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Leaves (2)3 or 4; foliage leaf blades linear, mostly 1.5–4.0 mm wide
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Ixia confusa
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11 (2)
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Anthers dehiscing completely by longitudinal slits
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Ixia curvata
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+
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Anthers dehiscing by short slits from base to middle, not reaching apex
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(12)
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12 (11)
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Foliage leaf usually single, sometimes 2 (uppermost leaf ± entirely sheathing), blade ± linear, 1.0–4.5 mm wide; flowers usually 4–8 per spike; perianth tube ± 4.5 mm long
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Ixia simulans
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+
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Foliage leaves 3–7, blades lanceolate to falcate, mostly 4–20 mm wide, or closely undulate and then only 2–4 mm wide; perianth tube 2.5–4.0 mm long
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(13)
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13 (12)
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Leaves 2–4(5) mm wide; corm tunics of fine, soft fibres; perianth tube 2–3 mm long
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(14)
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+
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Leaves 4–25 mm wide and margins plane or sometimes undulate(–crisped), then corm tunics of firm, medium-textured to coarse fibres; perianth tube 2.5–5.0 mm long
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(16)
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14 (13)
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Leaf margins strongly undulate and crisped; anthers ± 1.5 mm long
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Ixia erubescens
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Leaf margins plane; anthers 2–3 mm long
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(15)
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15 (14)
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Corms producing slender stolons from base, terminating in a single, large cormlet; anthers ± 3 mm long
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Ixia flagellaris
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+
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Corms not producing stolons; anthers 2.0–2.5 mm long
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Ixia tenuis
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16 (13)
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Plants rarely more than 60 cm high, simple or branched, with branches ascending to suberect; filaments ± uniformly filiform, < 1/2 as wide as anthers; style branches not noticeably flared at tips
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Ixia scillaris
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+
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Plants to 90 cm high, often branched, with branches held at right angles to main axis, becoming suberect distally; filaments expanded toward apex and becoming as wide as anthers; style branches widely flared at tips
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Ixia collina
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