@article {2394, title = {Pollen differences between Stylisma and Bonamia (Convolvulaceae)}, journal = {Brittonia}, volume = {23}, number = {4}, year = {1971}, note = {reprint in filesMentions in note (p. 333) that aggrecolpate grains have arisen independently in Aniseia, Calycobolus, Evolvulus, Jacquemontia, and Maripa. DFA assumes that 3-colpate grains are also present in these genera --- do we know this for sure?}, pages = {331-334}, abstract = {Although discounted in a monograph recognizing Stylisma as distinct from Bonamia, pollen morphology is useful in distinguishing these genera. Light and scanning electron microscopy show that the pollen of Stylisma is characterized by an advanced 3-aggrecolpate aperture totaling 12 or 15 colpi, while pollen of Bonamia is typically of a primitive 3-colpate type.}, keywords = {Bonamia, GS, pollen, STYLISMA}, author = {Lewis, W. H.} }