Key 5. Confirmatory characters

Characters – 88 in data, 75 included, 28 in key.
Items – 14 in data, 14 included, 17 in key.
Rbase = 1.40 Abase = 2.00 Reuse = 1.01 Varywt = .80
Characters included 2–24 26–77
Character reliabilities 2–5,7 7–10,7 11–13,8 14–26,7 27,8 28–38,7 40–43,7 44,8 45–47,7 48,8 49–63,7 64,6 65,7 66,8 67,7 68,2 69,1 70,2 71–76,1 77,8 78–85

1(0).
  • Hilum short.
  • Hilum long-linear.
... 2 ...11

2(1).
  • Female-fertile florets 1.
  • Female-fertile florets 2.
  • Female-fertile florets 3 or more.
... 3 ... Poa ... 9

3(2).
  • Spikelets disarticulating above the glumes.
  • Spikelets disarticulating between the glumes.
  • Spikelets falling with the glumes.
  • Spikelets not disarticulating.
... 4 ... Cynodon ... 6 ... 8

4(3).
  • Inflorescence of spicate main branches; ligule a fringed membrane to a fringe of hairs; spikelets secund; glumes shorter than the adjacent lemmas.
  • Inflorescence paniculate; ligule an unfringed membrane; spikelets not secund; glumes long relative to the adjacent lemmas.


... 5
... Agrostis

5(4).
  • Hairy callus present; lemmas awned; biochemical type PCK.
  • Hairy callus absent; lemmas awnless; biochemical type NAD–ME.
... Chloris ... Cynodon

6(3).
  • Spikelet-bearing axes disarticulating; hairy callus present; glumes more or less equal; lemmas incised.
  • Spikelet-bearing axes persistent; hairy callus absent; glumes very unequal; lemmas entire.

... Andropogon
... 7

7(6).
  • Inflorescence of spicate main branches; spikelets secund.
  • Inflorescence paniculate; spikelets not secund.
... Echinochloa ... Panicum

8(3).
  • Plants monoecious with all the fertile spikelets unisexual; fruiting inflorescence a massive, spatheate cob, the fruits in many rows; glumes more or less equal; stamens 0.
  • Plants bisexual, with bisexual spikelets; fruiting inflorescence not as in maize; glumes very unequal; stamens 3.


... Zea
... Panicum

9(2).
  • Inflorescence of spicate main branches; spikelets secund; fruit sculptured; pericarp free.
  • Inflorescence paniculate; spikelets not secund; fruit smooth; pericarp fused.

... Eleusine
... 10

10(9).
  • Glumes carinate; lemmas carinate; lodicules membranous; stigmas white.
  • Glumes non-carinate; lemmas non-carinate; lodicules fleshy; stigmas brown.

... Poa
... Phragmites

11(1).
  • Stamens 3; mesophyll without arm cells; midrib with one bundle only.
  • Stamens 6; mesophyll with arm cells; midrib having complex vascularization.
... 12
... 13

12(11).
  • Ligule an unfringed membrane; hairy callus absent; glumes very unequal; glumes shorter than the adjacent lemmas.
  • Ligule a fringed membrane to a fringe of hairs; hairy callus present; glumes more or less equal; glumes long relative to the adjacent lemmas.

... Festuca

... Anisopogon

13(11).
  • Inflorescence a complex of ‘partial inflorescences’ and intervening foliar organs; rachilla prolonged beyond the uppermost female-fertile floret; lemmas blunt; lodicules ciliate.
  • Inflorescence not comprising ‘partial inflorescences’ and foliar organs; rachilla terminated by a female-fertile floret; lemmas pointed; lodicules glabrous.


... Bambusa

... Oryza