Journal
PLANT BIOSYSTEMS
Volume 147, Issue 3, Pages 620-628Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/11263504.2012.748099
Keywords
Bostrychanthera; Gomphostemma; Lamioideae; taxonomy; tribe Gomphostemmateae
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Funding
- National Natural Science Foundation of China [31100164, 31110103911]
- Chinese Academy of Sciences [KSCX2-EW-J24, KSCX2-EW-Z-1]
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Pollen grains of 15 taxa of the genus Chelonopsis (14 spp. and 1 variety) from China and Japan and 6 species of the closely related genera Bostrychanthera (1 species) and Gomphostemma (5 species) were examined by light and scanning electron microscopy. Of these, the pollen morphology of 18 taxa was studied for the first time. Pollen grains were found to be tricolpate with polar lengths of 20.8-30.0 mu m and equatorial widths of 17.5-27.3 mu m. The basic shape of the pollen in most taxa is subprolate or prolate-spheroidal, but spheroidal, subprolate-spheroidal, oblate-spheroidal, and prolate-subprolate grains are also found in some species. The surface is generally reticulate or suprareticulate in Chelonopsis and granulate in Bostrychanthera. In comparison with those of Chelonopsis and Bostrychanthera, the pollen grain surfaces of Gomphostemma are more diverse. In Chelonopsis, pollen is taxonomically useful at the sectional level, and some grains provide enough characters for species delimitation. The potential pollination ecology of cellular hairs on the anthers of Chelonopsis and Bostrychanthera is also briefly discussed.
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