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Inflorescences racemose or spicate ; bractlets present or absent .

花序总状或穗状；小苞片宿存或无。

Inflorescences spicate or subcapitate ; all upper branches fertile .

花序穗状的或近头状；全部上部分枝可育。

Inflorescences short spicate or capitate , few flowered .

花序短穗状的或头状，很少花。

Inflorescences capitate to spicate , often few flowered .

对穗状，通常很少花头状的花序。

Inflorescences long spicate , interrupted basally ; bracts usually narrow and serrate or pinnatifid .

花序长穗状，间断；苞片通常狭窄和有锯齿或羽状半裂。