Anthers dorsifixed, thecae divaricate, confluent at apex; bracts 2, not forming an involucre, rarely up to 7 and whorled, 1, or absent.

• 花药背着，囊极叉开，汇合的在先端；苞片2，不形成一总苞，和轮生的可达7的很少，1，或无。(46