1 |
Female glumes 9-10 mm. |
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37 C. praeclara |
+ |
Female glumes less than 8 mm |
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(2) |
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2 (1) |
Utricles densely papillose, gray-green |
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(3) |
+ |
Utricles smooth or minutely punctate, yellowish green, stramineous, pale brown, or dark purple-red |
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(5) |
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3 (2) |
Female glumes acuminate or with short awn at apex, longer than utricles. |
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38 C. tarunensis |
+ |
Female glumes obtuse at apex, equaling or slightly shorter than utricles |
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(4) |
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4 (3) |
Female spikes 5-12 mm, sessile. |
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39 C. meyeriana |
+ |
Female spikes 10-25 mm, shortly stipitate. |
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40 C. hongyuanensis |
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5 (2) |
Upper 3 or 4 spikes male, rarely with a few female flowers at base. |
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41 C. polymascula |
+ |
Terminal spikes male or gynaecandrous or all spikes gynaecandrous |
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(6) |
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6 (5) |
All spikes gynaecandrous. |
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42 C. aristulifera |
+ |
Spikes gynaecandrous or with terminal spike male |
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(7) |
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7 (6) |
Terminal spike male (rarely bisexual in C. melanantha) |
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(8) |
+ |
Terminal spike gynaecandrous |
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(11) |
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8 (7) |
Female glumes broadly white hyaline on margins. |
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45 C. moorcroftii |
+ |
Female glumes narrowly white hyaline on margins or not |
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(9) |
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9 (8) |
Utricles 2-toothed at orifice. |
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46 C. minxianensis |
+ |
Utricles emarginate at orifice |
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(10) |
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10 (9) |
Spikes distant; leaves soft. |
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43 C. augustinowiczii |
+ |
Spikes approximate at culm apex, only lowest spike distant; leaves slightly stiff. |
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44 C. melanantha |
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11 (7) |
Utricles scabrous above on margins. |
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47 C. obscura |
+ |
Utricles smooth on margins |
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(12) |
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12 (11) |
Female glumes with a scabrous long awn at apex. |
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48 C. gmelinii |
+ |
Female glumes without scabrous long awn at apex |
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(13) |
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13 (12) |
Utricles veined |
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(14) |
+ |
Utricles nerveless (except for 2 costas on edges) |
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(19) |
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14 (13) |
Utricles elliptic or elliptic-lanceolate |
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(15) |
+ |
Utricles obovate-elliptic, obovate, or oblanceolate |
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(16) |
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15 (14) |
Spikes distant; female glumes pale or light ferruginous; orifice of utricles yellow-green, 2-toothed. |
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59 C. peiktusani |
+ |
Spikes approximate; female glumes dark purple; orifice of utricles purple-red, emarginate. |
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60 C. schneideri |
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16 (14) |
Utricles inflated |
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(17) |
+ |
Utricles not inflated |
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(18) |
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17 (16) |
Utricles 2-2.2 mm; female glumes broadly ovate, ca. 1.2 mm. |
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61 C. lehmannii |
+ |
Utricles (2.5-)3-3.3 mm; female glumes oblong, 2-2.5 mm. |
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62 C. montis-wutaii |
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18 (16) |
Utricles oblanceolate or narrowly elliptic, beak 2-toothed at orifice. |
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63 C. serreana |
+ |
Utricles obovate or elliptic-obovate, beak short and subtruncate at orifice. |
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64 C. caucasica |
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19 (13) |
Spikes contiguous forming a capitate or spicate inflorescence |
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(20) |
+ |
Spikes loosely disposed in racemose inflorescence |
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(22) |
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20 (19) |
Utricles membranous, vesicular, nerveless. |
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51 C. melanocephala |
+ |
Utricles leathery, granulose or glabrous, 3-5-veined |
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(21) |
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21 (20) |
Rhizome long; utricles ovate, glabrous, 4-5 mm; sandy plants. |
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49 C. sabulosa |
+ |
Rhizome short, culms loosely tufted; utricles obovate, minutely granulose, 2.5-3 mm. |
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50 C. melananthiformis |
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22 (19) |
Female glumes 2-3 mm; female spikes 4-15 mm |
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(23) |
+ |
Female glumes 4-6 mm; female spikes (20-)25-35 mm |
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(25) |
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23 (22) |
Utricles inflated, horizontally patent at maturity. |
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57 C. hancockiana |
+ |
Utricles compressed or slightly inflated, not horizontally patent at maturity |
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(24) |
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24 (23) |
Culms 30-60 cm tall; female glumes white hyaline on margins. |
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55 C. angarae |
+ |
Culms 15-25 cm tall; female glumes not white hyaline on margins. |
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56 C. duthiei |
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25 (22) |
Utricles stramineous, sometimes upper yellow-brown or purple punctate, compressed. |
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52 C. kansuensis |
+ |
Utricles dark brown to purple-brown |
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(26) |
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26 (25) |
Female glumes 6-6.5 mm; nutlets ca. 2.5 mm. |
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53 C. bijiangensis |
+ |
Female glumes 3.5-4 mm; nutlets 1.5-1.7 mm |
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(27) |
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27 (26) |
Utricles elliptic or ovate, shallowly 2-toothed at orifice. |
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58 C. atrata |
+ |
Utricles narrowly oblong, obliquely truncate at orifice. |
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54 C. obliquitruncata |