1	"Culms fairly slender, more-or-less nodding; adaxial surface of leaf-blade with prominent secondary nerves between midrib and margins; leafsheaths waxy to the touch"	"Cortaderia richardii"
1	"Culms stout, more-or-less erect, adaxial surface of leaf-blade without prominent secondary nerves; leaf-sheaths not waxy to the touch"	2
2	"Panicles always pink-purple, usually well exserted beyond the tuft of basal leaves; leaf-blades bright green, flat, drooping from the sheath; plants female only, caryopsis well developed at anthesis; flowering time January to March"	"Cortaderia jubata"
2	"Panicles white or purplish, only shortly exserted beyond the tuft of basal leaves; leaf-blades dull green, more-or-less folded at the base, high-arching, the midrib channelled on the adaxial surface; plants dioecious or gynodioecious; ovary not enlarged at beginning of anthesis; flowering time March to May"	"Cortaderia selloana"