October Report

I can hardly believe it’s been more than a month since my last post. Sadly, I’ve only been out hiking three times since then. In mid-October, there isn’t a whole lot of variety to see.

Serpentine Barrens Conservation Park, October 17:

  • asters, blue and white, unknown species
  • silver rod (Solidago bicolor)
  • tickseed sunflower (Bidens polylepis)
  • hyssop-leaved thoroughwort (Eupatorium hyssopifolium)
  • goldenrod (unknown species)

Carderock, October 17:

  • white snakeroot (Ageratina altissima)
  • flax-leaved aster (Ionactis linariifolia)
  • calico aster (Symphyotrichum lateriflorum)
  • blue stem goldenrod (Solidago caesia)
  • zigzag goldenrod (Solidago flexicaulis)
  • silver rod (Solidago bicolor)

Cabin John Trail, October 14:

  • beech drops (Epifagus virginiana)
  • seedpods on downy rattlesnake plantain (Goodyera pubescens)
  • common blue wood aster (Symphyotrichum cordifolium)
  • white wood aster (Eurybia divaricata)
  • other white aster (unknown species)


common blue wood aster
Symphyotrichum cordifolium

Common blue wood aster, aka heart-leaved aster, is found all over the eastern US and Canada, with some occurences in the midwest, mostly between the Missouri and Mississippi Rivers, and also in British Columbia. The taxonomy of several species closely related to this one is in flux*, so beware if you’re using an older guidebook to try to identify asters that you find. You might not be able to say for certain which species is is, only which genus. For that matter, the older guidebooks will still give the genus as Aster rather than Symphyotrichum.




white wood aster
Eurybia divaricata

White wood aster has similar leaves to common blue aster, but obviously different flowers. This species is not as widespread, occurring mostly in the greater Appalachian region, from New Hampshire to Alabama (and possibly in Quebec and Ontario).

BONAP and the Maryland Biodiversity Project agree that common blue wood aster can be found in Montgomery and Frederick Counties in Maryland, but disagree where else in the state it grows. Both sources show white wood aster growing in more counties in Maryland. Each of these species grows one to three feet tall, common blue in moist to dry woodlands, white wood in drier areas.  The patch of common blue pictured below is along the Cabin John Trail, near the southern end. It really just lights up the whole area.


*see my post last year on the subject: Are Asters Really Asters?

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.