Plant Systematics and Evolution

, Volume 141, Issue 3–4, pp 177–185 | Cite as

Morpho-ecological studies on geophilic plants: Vegetative reproduction inIris vartani (Iridaceae)

  • J. Galil


Structure and behaviour of the underground organs ofIris vartani were investigated in connection with the vegetative reproduction of this species. Under favourable conditions, well developed mature plants give rise to two replacement bulbs and to several propagation bulblets each year. In spite of this considerable vegetative propagation, no crowding occurs at the natural habitat. Controlled experiments show that as soon as a small group is formed, each bulb produces only one replacement bulb and not two as before. Moreover, the bulblets do not sprout while they are attached to the respective mother bulbs, but rather die and disintegrate, remaining as empty peels. In contrast, detached bulblets, sown individually in separate pots, germinate readily. Consequently, the aggregates ofI. vartani do not increase to any great extent and thus ensure their survival “in situ” for many years.

Key words

Angiosperms Iridaceae Iris vartani Bulb structure vegetative reproduction bulblet germination 


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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • J. Galil
    • 1
  1. 1.Department of Botany, The George S. Wise Faculty of Life SciencesTel Aviv UniversityTel AvivIsrael

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