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Rapateaceae

  • D. W. Stevenson
  • M. Colella
  • B. Boom
Chapter
Part of the The Families and Genera of Vascular Plants book series (FAMILIES GENERA, volume 4)

Abstract

Terrestrial, epiphytic, or amphibic perennial herbs with an erect or prostrate rhizome. Leaves unifacial to bifacial, condensed on a short stem, with an open asymmetrical conduplicate sheath; distichously or spirodistichously arranged; rarely petiolate, the petiole and the leaf blade occasionally bearing short spines; ligules rarely present. Inflorescences solitary or crowded, axillary or terminal, on leafless scapes, often subtended by 2 or more spathaceous bracts, globose or flat; the spikelets composing the inflorescences bearing numerous coriaceous bracts and a terminal flower; inflorescences that have an indeterminate main axis and lateral cymose units are more common than those with a determinate main axis and cymose lateral units (Monotremeae); flowers trimerous, hypogynous, perfect, and actinomorphic or slightly zygomorphic; sepals 3; petals 3, occasionally spotted; stamens 3 + 3, tetrasporangiate, connate at the base or adnate to the corolla tube, basifixed; anthers sometimes bearing terminal appendages, dehiscing by 4, 2, or 1 apical or subapically lateral pores, extrose or latrose; ovary syncarpous, superior, 3-locular or 1-locular by abortion; style 1, erect; stigma capitate, often minutely ciliate; ovules 1–8 per locule, anatropous, bitegmic, and crassinucellate; placentation axile or basal; fruit a septicidal capsule; seeds globose, prismatic, or oblong, occasionally bearing appendages; endosperm containing abundant starch; embryo lenticular, at micropylar end with flat surface appressed to endosperm; mechanical tissue of seed coat derived from both integuments.

Keywords

Corolla Tube Outer Integument Leaf Axil Spongy Tissue Partial Inflorescence 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • D. W. Stevenson
  • M. Colella
  • B. Boom

There are no affiliations available

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