Flower of the Day: Wingstem

Posted on September 5, 2014 by elizabeth

Verbesina alternifolia (formerly Actinomeris alternifolia); Asteraceae (aster family)

Like its close relative tall coneflower (fotd 8/21), wingstem has a central cone of disc flowers surrounded by reflexed ray flowers (petals). The cone looks quite different, though.

Another difference between the two species is the one that gives this plant its common name. Look closely at a stem and you’ll see that it’s lined with leaf tissue. This is a not uncommon occurrence with petioles (the leaf stem), but much less common with a plant’s main stem.

Wingstem grows very tall and loves riverbanks and moist places, just like tall coneflower, but blooms a bit later. It can be found through much of the eastern and midwestern US.

Here’s a closeup of the disc flowers:

Flower of the Day: Pilewort

Posted on September 4, 2014 by elizabeth

aka fireweed, burnweed; Erechtites hieraciifolius; Asteraceae (aster family)

In case you were wondering, the word “wort” comes from the Old English wyrt, meaning “plant” (usually herbaceous). Used as a suffix on a plant name it often signified something medicinal – so, spleenwort for spleen disorders, motherwort for uterine disorders, lungwort for lung disorders, lousewort caused lice infestations, and so on.

So, yes, pilewort was once used to treat piles, aka hemorrhoids. According to the Doctrine of Signatures, a plant’s use was found in its form. I don’t know what aspect of E. hieracifolia made the ancients think it resembles hemorrhoids, but there it is.

This is a weedy looking plant that grows up to eight feet tall in weedy places (eg, the mown edges of roadways), but it is indeed a native, and the only native in its genus found in the US (everywhere except the arid West).

The picture above shows what appears to be a bud, but that is actually considered a full flower. When the seeds are developed, those green bracts pop open and the seeds are dispersed on the wind.

Flower of the Day: Virginia Dayflower

Posted on September 3, 2014 by elizabeth

Commelina virginica; Commelinaceae (spiderwort family)

The dayflowers are somewhat weedy looking plants, growing maybe 2-3 feet tall, more often sprawling among other plants near river banks and other moist places. They would be easily overlooked but for the spectacular blue color – a rarity among plants. Fewer than ten percent of known species have truly blue blossoms. The individual flowers of Commelina last a single day, but a plant may have a blooming period of a month or more.

There are about a dozen species of Commelina in the US, about half of them native. Much more frequently seen in this area is the exotic C. communis (Asiatic dayflower). It’s easily distinguished from Virginia dayflower by the white lower petal.

Virginia dayflower is found from New York south through Texas and west through Kansas, but it’s extirpated in Pennsylvania. Asiatic dayflower ranges a little further north and northwest.

Flowers of the Day: Two More Goldenrods

Posted on September 2, 2014 by elizabeth

elm-leaved goldenrod; Solidago ulmifolia; Asteraceae (aster family)

wandlike goldenrod; Solidago stricta

Annoyed with myself for not always getting the information I need to properly identify species – especially Solidago species – I hiked one morning with my books tucked into my pack, with a little notebook, too. When I got to the cliffs upstream of Carderock, I set everything out on a boulder and started taking notes. In order to identify goldenrods, you need to consider the following:

stem: green, brown, purplish? smooth or rough? densely hairy, minutely hairy, covered with white bloom? hairy on one end but not the other? angled?
leaves: uniform size along the stem or getting smaller as they ascend? entire, serrate, doubly serrate? lower ones serrate, upper ones entire? sessile or with petioles? tapering or blunt at the base and/or tip? hairy on top? hairy underneath? hairy only along the veins underneath? feather veined or nerved? if nerved, one or three? thin or coarse? lanceolate, linear, elliptical, ovate?
inflorescence: plumelike, wandlike, elm-branched, clublike, flat-topped? terminal or axillary?
flowers: how many rays? size? bracts spreading?
habitat: swamp or bog? dry woods? field or roadside? thickets? dry sandy soils?

After all this, I’m still not sure the first one pictured above is correctly identified. And I’m still not sure which one this is:

At least I had fun taking pictures.

The List for August

Posted on September 1, 2014 by elizabeth

Plants first spotted blooming during the month of August.

Natives:

mistflower
flowering spurge
thin-leaved sunflower
strawberry-tomato (really, that’s what it’s called) fruit only
southern agrimony
dodder
horse balm
slender bush clover
winged monkey-flower
swamp rosemallow
dotted smartweed
hairy hawkweed
white wood aster
false daisy
grassleaf mudplantain
Virginia dayflower
common evening primrose
late goldenrod
horseweed
New York ironweed
large-flowered leafcup
hoary ticktrefoil
wingstem
purple-headed sneezeweed
late-flowering boneset
upland boneset
Spanish needles
Canada goldenrod
partridge-pea
pilewort
giant ragweed
swamp smartweed
white-bracted boneset
showy ticktrefoil
hog-peanut
wild bean
pearly everlasting
clammy ground-cherry
slender goldenrod
nodding smartweed
arrow-leaved tearthumb
beggar-ticks
Virginia buttonweed
Virginia bugleweed
elm-leaved goldenrod
wandlike goldenrod

Aliens:

big-flowered vetch
sweet autumn clematis
common hops
Japanese knotweed
common mugwort
velvetleaf
liriope
black nightshade

bringing the year’s totals to:

254 natives in 76 families
73 aliens in 30 families

for a grand total of 327 species in 80 families.

Twenty two percent of all species found have been alien.

Elizabeth's Wildflower Blog

hunting in the Maryland piedmont (mostly)

Monthly Archives: September 2014