Chrysopogon, Trinius, 1820
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publication ID |
https://doi.org/ 10.11646/phytotaxa.307.4.2 |
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persistent identifier |
https://treatment.plazi.org/id/8B248788-FA61-FF95-FF3A-F96EFA7AE328 |
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treatment provided by |
Felipe |
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scientific name |
Chrysopogon |
| status |
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Key for identification of species of Chrysopogon View in CoL in Kerala
1. Raceme of many pairs of spikelets arranged in whorls; spikelets awnless; lower glume muricate or spinulose. ........................... 2
- Racemes ends with a group of 3 spikelets, one sessile and two pedicelled spikelets at tips of slender peduncles; spikelets awned; lower glume smooth. ........................................................................................................................................................................ 3
2. Roots with aromatic oil; apex of upper glume of sessile spikelets muticus; second lemma with less than 2 mm long awn............... ....................................................................................................................................................................................... C. zizanioides View in CoL
- Roots without aromatic oil; apex of upper glume of sessile spikelets mucronate; second lemma with 2.5–5 mm long exserted awn ....................................................................................................................................................................................... C. festucoides View in CoL
3. Culms creeping and ascending; pedicels glabrous. ....................................................................................................... C. aciculatus View in CoL
- Culms always erect; pedicels villous. ............................................................................................................................................... 4
4. Pedicels half as long as the sessile spikelets or longer. ..................................................................................................................... 5
- Pedicels shorter than half the length of sessile spikelet..................................................................................................................10
5. Lower glume of pedicelled spikelet awned. ..................................................................................................................................... 6
- Lower glume of pedicelled spikelet not awned. ……....................................................................................................................... 9
6. Awn of upper lemma of sessile spikelet less than 5 cm long. ........................................................................................................... 7
- Awn of upper lemma of sessile spikelet more than 5 cm long. ......................................................................................................... 8
7. Lower glume of sessile spikelet with short awn of less than 12 mm long; leaves more than 3.5 mm broad; pedicelled spikelets 9.5–10 mm long. ......................................................................................................................................................... C. verticillatus View in CoL
- Lower glume of sessile spikelet not awned; leaves less than 3 mm broad; pedicelled spikelets 7–8.5 mm long. ........ C. narayanii
8. Leaves conspicuously distichous; sheaths much compressed and acutely keeled; leaf base semi-amplexicaul; sessile spikelet up to 6 mm long; lower glume of sessile spikelets awned. ........................................................................................................... C. asper View in CoL
- Leaves not conspicuously distichous; sheaths rounded; leaf base not semi amplexicaul; sessile spikelets more than 6 mm long; lower glume of sessile spikelet not awned.. .................................................................................................................... C. orientalis View in CoL
9. Leaves more than 3 mm broad, hairy on both surfaces; upper glume of pedicelled spikelet awnless; awn of upper lemma of sessile spikelet less than 4 cm long. ....................................................................................................................................... C. nodulibarbis View in CoL
- Leaves up to 2 mm broad, glabrous; upper glume of pedicelled spikelet awned; awn of upper lemma of sessile spikelet more than 4.5 cm long. ................................................................................................................................................................ C. tadulingamii View in CoL
10. Leaves distichous, crowded from the middle upwards; sessile spikelets 6–8 mm long......................................... C. purshothamanii
- Leaves not distichous and crowded, sessile spikelets 3.5–6 mm long.............................................................................................11
11. Leaf-sheaths and blades puberulous. ............................................................................................................................... C. velutinus View in CoL
- Leaf-sheaths and blades not puberulous, occasionally with a few tubercle-based hairs.................................................................12
12. Leaf blade less than 6 cm long; panicle 6–8 cm long; racemes less than 2.5 cm long. ........................................................ C. fulvus View in CoL
- Leaf blade 15–92 cm long; panicle 14–26 cm long; racemes 3–4.5 cm long. ................................................................... C. hackelii View in CoL
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