Pollen Morphology of Tribes Gnaphalieae, Helenieae, Plucheeae and Senecioneae (Subfamily Asteroideae) of Compositae from Egypt

Ahmed Kamal El-Deen Osman

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DOI: 10.4236/ajps.2011.22014                

Abstract

POLLEN morphology of twenty five species representing 12 genera of tribes Gnaphalieae, Helenieae, Plucheeae and Senecioneae (Asteroideae: Asteraceae) was investigated using light and scanning electron microscopy. The genera are Phagnalon, Filago, Gnaphalium, Helichrysum, Homognaphalium, Ifloga, Lasiopogon, Pseudognaphalium, Flaveria, Tagetes, Sphaeranthus and Senecio. Two pollen types were recognized viz. Senecio pollen type and Filago pollen type. Description of each type, a key to the investigated taxa as well as LM and SEM micrographs of pollen grains are provided.

Keywords

Pollen, Morphology, Asteroideae, Asteraceae, Egypt

Conflicts of Interest

The authors declare no conflicts of interest.

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