带有主干(轴)的花序 Spike(r): Unbranched with flowers lacking pedicels, in wheat Raceme(Sr: Unbranched with flowers on pedicels, found in Arabidopsis a compound raceme is called panicle(a#s), in some grasses flowers flowers on branched sessile pedicels raceme spike raceme panicle 穗 总状 圆锥 http://waynesword.palomaredu/terminfl.htmhttp://waynesword.palomar.edu/terminf1.htm Spike (穗): Unbranched with flowers lacking pedicels, in wheat. Raceme (总状): Unbranched with flowers on pedicels, found in Arabidopsis; a compound raceme is called panicle (圆锥), in some grasses. 带有主干（轴）的花序 穗 总状 圆锥