| | Olympus FluoView Resource Center: Confocal Gallery - Fleabane Flower Head |
 | | Fleabane was readily available to the settlers since the plants are particularly abundant in the continent’s temperate zones. |
 | | Most varieties of fleabane exhibit flower heads that are composed of both a central, disk flower consisting of numerous tightly packed flowers that at first appear to be a single entity and ray flowers, which are the elongated petals evenly spaced around the periphery of the disk flower. |
 | | Fleabane Flower Head at High Magnification - Since the disk flower is the nectar- and pollen-rich section of the plant, it is an essential part of all fleabane varieties, although ray flowers are absent in some species. |
| www.olympusfluoview.com /gallery/plants/fleabaneflowerhead.html (366 words) |