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| 1 |
Inflorescence penetrating leaf sheath, sessile, capitate; fertile stamens 6. |
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(2) |
| + |
Inflorescence neither penetrating leaf sheath nor sessile nor capitate; stems sometimes with lateral branches penetrating leaf sheaths; fertile stamens 6 or fewer. |
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(3) |
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| 2 (1) |
Herbs erect, sometimes procumbent proximally, simple; anthers dehiscent by longitudinal slit |
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5 Amischotolype |
| + |
Herbs climbing, branched; anthers dehiscent by apical pore |
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6 Porandra |
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| 3 (1) |
Climbers; involucral bracts large, spathelike; flowers in basal and middle cincinni of panicles bisexual, others male. |
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(4) |
| + |
Herbs erect or prostrate; involucral bracts spathelike or not; flowers all bisexual. |
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(5) |
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| 4 (3) |
Cincinni all involucral; lateral branches with an inflorescence at every node; ovules 2 per locule |
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1 Streptolirion |
| + |
Only basal cincinni involucral; branches without an inflorescence at most nodes; ovules 8 per locule |
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2 Spatholirion |
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| 5 (3) |
Fruits baccate, indehiscent; inflorescence terminal |
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10 Pollia |
| + |
Fruits capsular; inflorescence terminal or not. |
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(6) |
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| 6 (5) |
Inflorescence terminal, broomlike, with extremely numerous small flowers; capsule small, 2-valved, with 1 seed per valve |
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7 Floscopa |
| + |
Inflorescence terminal or not, not broomlike; capsule 3-valved, rarely 2-valved when fertile stamens 3. |
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(7) |
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| 7 (6) |
Involucral bracts spathelike (except in Cyanotis axillaris, which has inflorescence enveloped in leaf sheath; fertile stamens 6; petals connate at middle). |
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(8) |
| + |
Involucral bracts present or absent, spreading or sheathlike, never spathelike. |
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(10) |
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| 8 (7) |
Petals connate, tubular, with 2 ends free; fertile stamens 6; bracts falcate-curved, imbricately arranged in 2 rows |
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4 Cyanotis |
| + |
Petals wholly free; fertile stamens 3 or 6; bracts not imbricately arranged in 2 rows. |
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(9) |
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| 9 (8) |
Flowers zygomorphic; fertile stamens 3, inserted on 1 side; antherodes 4-lobed, butterflylike; capsule usually 2-valved, posterior valve often indehiscent |
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13 Commelina |
| + |
Flowers actinomorphic; fertile stamens 6; capsule 3-valved |
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14 Tradescantia |
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| 10 (7) |
Inflorescence sessile or extremely shortly pedunculate, flowers nearly in axillary heads or fascicled; fertile stamens usually 6, less often 1--3. |
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(11) |
| + |
Inflorescence obviously pedunculate, terminal or also axillary; fertile stamens 2 or 3. |
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(12) |
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| 11 (10) |
Petals pink, blue, or purple; filaments bearded, connectives narrow; stigma capitate |
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3 Belosynapsis |
| + |
Petals white; filaments glabrous, connectives broad, square, deltoid, oblong, rarely narrow; stigma mostly penicillate |
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15 Callisia |
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| 12 (10) |
Staminodes apically entire and sagittate, or 3-sect; fertile stamens 3 (sometimes 1 or 2 aborted), all inserted opposite sepals |
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8 Murdannia |
| + |
Staminodes apically dumbbell-shaped; fertile stamens 2 or 3, inserted in posterior or anterior position. |
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(13) |
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| 13 (12) |
Fertile stamens anterior; capsule cylindric, 2--3 × longer than wide; seeds 4--8 per valve |
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9 Tricarpelema |
| + |
Fertile stamens posterior; capsule globose; seed 1 per valve. |
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(14) |
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| 14 (13) |
Fruit glabrous; petals not clawed, usually white |
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11 Dictyospermum |
| + |
Fruit adhesive to touch with glandular, hooked hairs; upper petals shortly clawed, pale lilac |
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12 Rhopalephora |
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