| 1 |
Flowers solitary or in pairs (rarely in clusters of 3 at apex of inflorescence in L. wahlenbergii). |
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(2) |
| + |
Flowers several to many, congested in inflorescence. |
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(7) |
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| 2 (1) |
Seed appendage slightly shorter than or equaling seed. |
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(3) |
| + |
Seed appendage absent or inconspicuous. |
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(4) |
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| 3 (2) |
Perianth segments 2.5--3 mm; filaments 0.6--0.9 mm, anthers 1--1.3 mm |
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1 Luzula rufescens |
| + |
Perianth segments 3--4 mm; filaments ca. 1 mm, anthers ca. 1 mm |
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2 Luzula plumosa |
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| 4 (2) |
Pedicels spreading, to 3 cm; anthers shorter than filaments |
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3 Luzula effusa |
| + |
Pedicels present but very short; anthers mostly equaling filaments. |
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(5) |
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| 5 (4) |
Bracteole ciliate at margin; basal bract 0.5--1.5 cm; flowers usually in clusters of 2 or 3 |
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4 Luzula wahlenbergii |
| + |
Bracteole entire, subentire, or lacerate at margin; basal bract 2.5--6 cm; flowers solitary. |
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(6) |
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| 6 (5) |
Capsule ovoid, apex mucronate; inflorescences umbel-like, flowers crowded |
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5 Luzula parviflora |
| + |
Capsule subglobose to broadly ellipsoid, apex not mucronate; inflorescences corymbose, flowers lax |
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6 Luzula sichuanensis |
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| 7 (1) |
Inflorescences spikelike, often interrupted. |
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(8) |
| + |
Inflorescences umbellate, subumbellate, subcorymbose, or cymose. |
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(9) |
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| 8 (7) |
Perianth segments 2.7--3.2 mm, unequal with inner ones usually shorter than outer, apex aristate; inflorescences nodding; capsule 2.2--3 mm |
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15 Luzula spicata |
| + |
Perianth segments 2.1--2.8 mm, subequal or inner ones usually slightly longer than outer, apex acuminate; inflorescences upright; capsule 2--2.2 mm |
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16 Luzula taiwaniana |
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| 9 (7) |
Perianth segments equal or subequal. |
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(10) |
| + |
Perianth segments unequal. |
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(13) |
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| 10 (9) |
Perianth segments 1.8--2.1 mm |
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10 Luzula oligantha |
| + |
Perianth segments 2.3--4 mm. |
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(11) |
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| 11 (10) |
Basal involucral bract longer than inflorescence, rarely shorter; anthers shorter than filaments; style distinctly shorter than ovary |
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9 Luzula jilongensis |
| + |
Basal involucral bract often shorter than inflorescence, sometimes equaling it, rarely longer; anthers longer than filaments; style equaling or longer than ovary. |
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(12) |
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| 12 (11) |
Filaments 0.4--0.5 mm; anthers 1.8--2.2 mm; style longer than ovary; plants laxly tufted |
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7 Luzula campestris |
| + |
Filaments 0.6--0.8 mm; anthers 1--1.5 mm; style subequaling ovary; plants densely tufted |
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8 Luzula multiflora |
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| 13 (9) |
Inflorescences with 5--15 headlike clusters. |
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(14) |
| + |
Inflorescences with 1--4 headlike clusters. |
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(15) |
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| 14 (13) |
Outer perianth segments with a 0.6--0.9 mm mucro at apex; style 0.5--0.7 mm; stigmas 1.8--2 mm |
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11 Luzula inaequalis |
| + |
Outer perianth segments acute at apex; style ca. 0.5 mm; stigmas ca. 1.5 mm |
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12 Luzula pallescens |
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| 15 (13) |
Plants 30--35 cm tall; basal leaf blade 8--14 cm; cauline leaves 2 or 3; anthers equaling filaments; seed appendage 0.2--0.3 mm |
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13 Luzula badia |
| + |
Plants 9--13 cm tall; basal leaf blade 2--6 cm; cauline leaf 1; anthers shorter than filaments; seed appendage not more than 0.1 mm |
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14 Luzula bomiensis |
