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Darwiniana, nueva serie

Print version ISSN 0011-6793


LIMA, Luis F. P.  and  MIOTTO, Silvia T. S.. Pollen morphology of Cyclanthera and Sicyos species (Cucurbitaceae, Sicyoeae). Darwiniana [online]. 2011, vol.49, n.1, pp.7-15. ISSN 0011-6793.

Pollen morphology of eight species of Cyclanthera and three species of Sicyos was studied using light and scanning electron microscopy. Pollen grains of Cyclanthera have a mean polar diameter of 51.40 µm, and an equatorial mean diameter of 49.10 µm, a prolate spheroidal shape (P/E = 1.11), 4-7 zonocolporate, with circular endoapertures, and punctitegilate exine. Pollen grains of Sicyos have a mean polar diameter of 50.60 µm and a mean equatorial diameter of 61.30 µm, an oblate spheroidal shape (P/E = 0.88), 8-12 colpate, supra and microreticulate echinate exine. Differences among the genera and species are discussed.

Keywords : Cucurbitaceae; Pollen; Sicyoeae.

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