Involucral bracts straw-colored ( sometimes blackish at apex ) , elliptic , ovate , or obovate .
总苞片稻草色(有时微黑的在先端),椭圆,卵形,或倒卵形。
Inflorescence a dense spike or raceme , sometimes resembling a single flower when large involucral petaloid bracts are present at base ; bracts evident or inconspicuous .
花序为紧密的穗状花序或总状花序,有时当总苞片花瓣状在基部着生时象单个的花;苞片明显的或不明显。
Involucral bracts sessile ; pistils and achenes pubescent .
总苞片无柄;雌蕊和瘦果短柔毛。
Pistils and achenes pubescent or glabrous ; involucral bracts sessile or petiolate .
雌蕊和瘦果被短柔毛或无毛;总苞片无柄或具叶柄。
Pistils and achenes glabrous ; involucral bracts petiolate .
雌蕊和瘦果无毛;总苞片具叶柄。
The involucral bristles appear to be always glabrous .