Many succulents flower in Autumn.  Flowers are often long lasting and attract bees.  In the case of Sedum sieboldii, it puts on a spectacular Pom Pom show that last several weeks.  These sedums (Hylotelephiums) will die down over winter and spent flowers and stems can be cut back to the soil to rest (dormant) in Winter and burst to life again in Spring with little rosette leaves that grow and form pendulous stems over summer and flower in Autumn.  Autumn Cactus (Zygocactus) reverts to a foliage plant and does not die down after flowering.