Plant Systematics and Evolution

, Volume 170, Issue 3–4, pp 161–175 | Cite as

“Ixoroid” secondary pollen presentation and pollination by small moths in the Malagasy treeletIxora platythyrsa (Rubiaceae)

  • L. Anders Nilsson
  • Elisabeth Rabakonandrianina
  • Börge Pettersson
  • Jaona Ranaivo


The pollination biology ofIxora platythyrsa (Rubiaceae) was studied in NW. Madagascar. The plant displayed cream-yellow, nocturnally fragrant, nectariferous, tubular and strongly protandrous flowers. These had an “ixoroid” secondary pollen presentation mechanism: prior to anthesis, anthers exhausted their pollen onto unripe stylar heads. From this position pollen of male-stage flowers later adhered to primarily the probosces of small visiting nocturnal noctuid and geometrid moths. — Pollen was subsequently raked off moths' probosces by receptive, copiously papillose stigmas of female-stage flowers. Principal pollination adaptation was probably to the noctuid moth subfam.Sarrothripinae.

Key words

Angiosperms Rubiaceae Ixora I. platythyrsa Moth-pollination secondary pollen presentation Flora of Madagascar 


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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • L. Anders Nilsson
    • 1
  • Elisabeth Rabakonandrianina
    • 2
  • Börge Pettersson
    • 1
  • Jaona Ranaivo
    • 2
  1. 1.Department of Systematic BotanyUniversity of UppsalaUppsalaSweden
  2. 2.Service de BotaniqueUniversité de MadagascarMadagascar

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