1.Flowers unisexual, monoecious, densely fascicled in terminal racemes, female in lower part, male in upper part, sometimes male throughout.
单性的花，雌雄同株，密簇生在顶生总状花序内，在下半部分内女性，在上半部分内男性，有时各部都有男性。
2.Leaves opposite. Corymbs short pedunculate or sessile, axillary, often fascicled.
叶对生伞房花序短的有花序梗或者无柄，腋生，经常是簇生。
3.Flowers fascicled in axil of upper leaves, bisexual but number of organs variable.
花簇生在上部的叶的腋部，两性，但是器官的数量易变。
4.Flowers axillary, solitary or fascicled, often arranged into terminal racemes.
腋生的花，单生或簇生，通常排列成顶生的总状花序。
5.Racemes elongate, sparsely flowered, fascicled in axils. Flowers small.
总状花序拉长，稀少花，在腋内簇生。
6.Rootstock swollen, with transverse air chambers, roots fascicled.
使膨胀的根茎，具横裂的气室，根簇生。
7.Shrubs or trees. Leaves alternate; stipules absent. Flowers small, 2 to many fascicled and axillary, pedicellate or sessile.
灌木或乔木叶互生无托叶花小，2到多数簇生和腋生，有花梗或无梗。
8.the unusual megastrobilus had a ability to accept pollen, and developed into fascicled small cone on the branches.
异常大孢子叶球具有接受花粉的能力，并在枝条上发育成为蔟状着生的小球果。
9.Leaves opposite, rarely fascicled or alternate, simple or compound; leaf or leaflet blades palmately veined.
叶对生，很少簇生或互生，单的或复合；叶或小叶叶片掌状脉。
10.ovules numerous, with free central placentation, longitudinal 5-fascicled.
胚珠许多，具特立中央胎座式，纵裂5。