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| | Ryan T. McWilliams |
 | | With a greater surface area to the wind at a similar mass, it is thought - although not documented - that sacci confer greater flight range to the pollen grain. |
 | | Using electron microscopy, structurally different saccate pollen grains of three extant conifers (Pinus, Falcatifolium, and Dacrydium) have been examined. |
 | | Several characteristics have been documented, including overall size, main body size, saccus size, surface ornamentation, wall thickness, wall infrastructure, saccus infrastructure, overall mass, and wall mass. |
| www2.truman.edu /~josborn/Ryan_T_McWilliams.htm (277 words) |
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