Flower - heads narrowly campanulate , 16 - 19 mm long , ca . 6 mm across , usually 2 - 4 in terminal clusters ; peduncle 2 - 8 mm ; involucral bracts ca . in 7 series , ribbed on abaxial surface , apex spiny 叶互生,卵形,长3 - 5 . 5厘米,宽2 - 4厘米,先端短尖,基部近截形,边缘具疏齿,两面被长柔毛,具基出脉3条;叶柄长3 - 5毫米。
2.
Spikes 15 - 25cm long , single or paniculate , flowers white , dense ; calyx late - campanulate , 2mm long , 5 - toothed ; petals 5 , oblong , 4mm long , slightly connate at base ; stamens 10 , free ; slightly exserted ; ovary glabrous 穗状花序长15 - 25厘米,单生或排成圆锥花序式,花白色,密集,花萼阔钟状,长2毫米,具5齿;花瓣5 ,长圆形,长4毫米,基部稍连合;雄蕊10枚,分离,略突出于花冠之外;子房无毛。