Willow Aster

Aristocrats...

If I indulge my fantasy, I imagine asters as sentient beings, each with its own personality. If that were the case, then Willow Asters would be aristocrats, with their subtle lavender petals, slender leaves, and graceful poses.

Willow Aster, Symphyotrichum praealtum

If she were a lady, she would host gracious, elegant parties by a lake. Suitors would long for her attention.

There are indeed beings who visit her every hour of the day. She is always attended by bees, butterflies, and myriad other insects.

Bumblebee | Painted Lady butterfly | Golden Soldier beetle | [Click a pic to enlarge]

As in other asters, each Willow Aster flowerhead looks like a daisy, with petals that radiate out from a central disk. It looks like a single flower. Actually it is a composite of 30-or-so individual, miniature flowers, called florets, all bound together like a bouquet.

In a magnified view, the florets open first around the outside edge of the central disc, exposing the reproductive parts for pollination.

The central disk looks yellow when the flowerhead opens, turning brownish red as it matures. With the help of a microscope, the individual florets appear. At first they are closed, like buds (which is what they are). As they open and get pollenated, they darken.

Identifying Willow Aster

Some asters are a little challenging to name, because the identifying field marks are small. However, Willow Asters are easy.

All of her leaves are long and slender. Even at the base of the plant, where some other asters have wider leaves, those of Willow Aster are narrow.

All the leaves of Willow Aster are long and narrow

And there’s a neat trick that clinches the ID on this flower. It takes magnification. You need an inexpensive 10-power loupe, a magnifier that fits in your pocket.

Reticulated vein structure looks like a net. | [Click a pic to enlarge]

Pick a leaf from a Willow Aster, and look at its lower surface through the magnifier. Suddenly you see the vein structure of the leaf.

The leaf’s veins divide the space into small, regular, closed areas. Like a net. The leaf is described as reticulated — which means like a net. It’s the trademark of Willow Aster. This is reason enough for me to carry my loupe with me always during aster blooming season.

Where to find Willow Aster

Willow Aster is not rare where I live, in southeast Iowa. If you walk in grassy fields, especially in a damp areas, you may find her blooming profusely.

Willow Aster, with lavender petals and yellow-to-brownish central discs

Willow Aster native range map

It’s fairly widespread in central and eastern North America.

Range Map of Willow Aster, by BONAP (The Biota of North America Program). Light green means found in a county. Dark green means found in the state but not the county.

Fall is when asters of many species bloom. Now’s the time!

I have to end now, because I need to go outside and admire the asters.

---

---