FIELD KEY TO INDIGENOUS GENERA, FOR USE IN BHUTAN
Clump-forming bamboos, culms growing in separate clumps of more than 10 culms:-
Maximum culm diameter > 7cm:-
Culm covered with dark or thick furry wax, central branches varied, often very large . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. Dendrocalamus
Culm with light covering of pale wax, central branches fairly uniform, usually quite small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. Bambusa
Maximum culm diameter < 7cm:-
Maximum internode length > 40cm:-
Leaves with cross-veins as well as long veins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3. Borinda Leaves with only long veins, no cross-veins:-
Culm nodes with no collar or with thick flat even collar . . . . . . . . . . . . . . . . . . . . . 4. Cephalostachyum Culm nodes with thin projecting wavy collar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. Ampelocalamus
Maximum internode length < 40cm:-
Buds tall, chilli-shaped . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. Thamnocalamus Buds short, onion-shaped:-
Culm sheath blade more than 2cm wide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. Bambusa Culm sheath blade less than 1 cm wide:-
Culm sheath rough inside at top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7. Drepanostachyum Culm sheath smooth inside at top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8. Himalayacalamus
Spreading bamboos, culms growing separately or in groups of up to 10 culms:-
Culms with rings of thorns around the nodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9. Chimonobambusa Culms with no thorns:-
Leaves with no cross veins, long veins only:-
dbh > 4 cm . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10. Melocanna dbh 2-4 cm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11. Pseudostachyum dbh < 2 cm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12. Neomicrocalamus
Leaves with distinct cross veins as well as long veins:-
Long rhizome lengths without roots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13. Yushania Rhizome rooting at all nodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14. Sarocalamus
|