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
|