Table 2 in The genus Piptadenia Benth.: pollen morphology and taxonomic implications

Table2. Qualitative characters of the polyads from Piptadenia species (Leguminosae). SpeciesSizeShapePollen grain number per polyadExineSexine:Nexine/NUbisch bodiesTypePiptadenia adiantoidesSmallOvoid12RugulateS=N-2Piptadenia affinisMediumOvoid8RugulateS>N+3Piptadenia buchtieniiMediumSpheroidal12Rugulate-+2Piptadenia cuzcoënsisMediumSpheroidal12RugulateS<N-2Piptadenia floribundaMediumSpheroidal12RugulateS<N-2Piptadenia gonoacanthaSmallSpheroidal12AreolateS=N+2Piptadenia imatacaeMediumSpheroidal16Rugulate--1Piptadenia irwiniiSmallOvoid8VerrucateS=N-3Piptadenia killipiiSmallOvoid16AreolateS=N-1Piptadenia laxipinnaMediumSpheroidal16RugulateS=N-1Piptadenia micracanthaSmallSpheroidal8RugulateS=N-3Piptadenia paniculataMediumSpheroidal16GranulateS=N+1Piptadenia peruvianaMediumSpheroidal16AreolateS>N-1Piptadenia pterocladaMediumOvoid12RugulateS<N+2Piptadenia ramosissimaSmallOvoid8Areolate--3Piptadenia retusaSmallOvoid8VerrucateS=N-3Piptadenia robustaMediumSpheroidal12RugulateS=N-2Piptadenia santosiiMediumOvoid12RugulateS>N-2Piptadenia trispermaSmallSpheroidal8Verrucate--3Piptadenia uaupensisMediumSpheroidal16VerrucateS>N-1Piptadenia uliginosaMediumSpheroidal16RugulateS=N+1 Legend: S = sexine / N= nexine