• D. E. Stone
Part of the The Families and Genera of Vascular Plants book series (FAMILIES GENERA, volume 2)


Trees, or rarely large shrubs, deciduous or evergreen; bark tight or exfoliating; pith solid or chambered; buds naked or scaly; axillary buds solitary or serial. Leaves alternate or opposite, pinnately compound, even- or odd-pinnate; stipules absent; leaflets sessile or petiolulate, margins entire or serrate, dotted below with peltate scales, sometimes aromatic. Plants monoecious or rarely dioecious (?). Inflorescences terminal on new growth, lateral on old wood, or the staminate sometimes at the base of new growth; staminate and pistillate catkins separate or combined into an androgynous panicle with the central spike wholly or partly pistillate, and lateral catkins staminate; staminate inflorescence a solitary catkin or cluster of 3–8 catkins; pistillate inflorescence a many-flowered catkin or a 2- to several-flowered spike. Flowers unisexual, apetalous, small. Staminate flower with receptacle round to elongate, bract unlobed or 3-lobed, 2 bracteoles, fused to receptacle and appearing as part of calyx, or bracteoles absent; sepals 4, fewer or absent, epigynous; stamens 3 to > 100, 1–2 or more series, filaments short, anthers basifixed, erect, 2-locular, longitudinally dehiscent; rudimentary pistil rarely present.


Staminate Flower Pistillate Flower Staminate Inflorescence Pistillate Inflorescence Fossil History 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer-Verlag Berlin Heidelberg 1993

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