All
of Don’s photos of todays ramble can be see here.

We
continued the Thursday curse with a temperature in the low 30s. One of the
drawbacks of Daylight Savings Time is that 8:30 is really 7:30 as far as sun
time goes. Nevertheless, fifteen ramblers showed to brave the chilly weather.

Today’s
reading was the famous quotation from Baba Dioum, the Senegalese
conservationist: “In the end, we
will conserve only what we love, we will love only what we understand, and we
will understand only what we are taught.”

Today’s route:

From the
arbor through the Shade Garden onto the White Trail (WT) to the power line right-of-way
(ROW). Then up the ROW to the fence and left along the fence to the WT. Turn
right, through the gate, and follow the WT to the second intersection with the
Red Trail (RT). Follow the RT to the WT, then turn left on the WT and follow it
to the intersection with the Green Trail (GT). Take the GT back to our starting
point on the WT and then back to the Arbor.

Arbor through Shade Garden:

As
we made our way down the Shade Garden path, Emily stopped to point out

Golden Ragwort

the new blossom
on the same Golden Ragwort she showed us two weeks ago. The “-wort”
suffix is an old English word that simply means “plant,” and has no
relationship to the near homophone “wart.” The ragworts, of which
there are many species, all used to be encompassed in the genus Senecio. But recent analyses of the DNA
sequences showed that the Old World ragworts all more closely related than any
of them were to the New World species. Since our classification is supposed to
reflect evolutionary relationships it became necessary to provide the New World
ragworts with a different genus name, Packera,
much to the irritation of New World plant lovers who had been happily calling
them Senecio for many generations.
You will still see garden signage with the old name.

The
ragworts are also known as “groundsels” and M. Grieve, at Botanical.com, A Modern Herbal, has this
to say about the origin of the name:

The name Groundsel is of old origin, being derived
from the Anglo-Saxon groundeswelge, meaning literally, ‘ground
swallower,’ referring to the rapid way the weed spreads. In Scotland and the
north of England it is still in some localities called Grundy Swallow – only a
slight corruption of the old form of the word – and is also there called Ground
Glutton. In Norfolk it is often called Simson or Sention, which has by some
been considered an abbreviation of ‘Ascension Plant.’ It seems more probable
that ‘Sention’ is a corruption of the Latin, Senecio, derived from Senex
(an old man), in reference to its downy head of seeds; ‘the flower of this herb hath white hair and when
the wind bloweth it away, then it appeareth like a bald-headed man.’

The
Golden Ragwort has certainly spread far and wide in the Dunson garden and is
fully consistent with the English name groundsel.

Chatahoochie Trillium

Further
down the Shade Garden we noticed a Trillium, standing tall and in bloom. The
Trilliums in the nearby Dunson garden have been spreading and hybridizing, so
it is not certain what species this is, but the leaves retain the silvery-white
stripe in the middle that is characteristic of the Chatahoochie Trillium.

Barbara
asked: “If the Trilliums are hybridizing does that mean they are not distinct
species?” 

Species
concepts still provoke a lot of vigorous discussion among biologists. Botanists
and zoologists also differ in how they apply species concepts to the organisms
they study. Perhaps the most widely used definition is that species are “reproductively
isolated” populations in nature. This means that, in natural situations,
plants or animals that do not interbreed should be considered separate species,
even if they can interbreed when placed together in an unnatural environment,
or artificially hybridized, as in a garden or a zoo.

White Trail to Powerline ROW

In
the open, disturbed area at the intersection of the White Trail and the ROW we discovered many wildflowers in bloom. Some are
native, others naturalized. Naturalized is a term applied to a non-native plant
that has become established in an area where it does not naturally occur. Established
means that the plant population reproduces sufficiently to maintain itself in
that area.

Small Bluet

Quaker Ladies

First,
the natives. We found two types of bluets, easily distinguished by the color of
the central part of the flower. Both have tubular, four-lobed petals that vary
in coloration from white to blue, or blue to purple. The Small Bluet has a
reddish colored center with blue or purple petals. The dainty Quaker Ladies has
a yellow center and petal color ranging from blue to white. 

Field Pansy

White Dooryard Violet

Two
native violets, Field Pansy (also called Johnny-Jump-Up) and Common Blue Violet
(Dooryard Violet, Confederate Violet), were starting to bloom. We found one
white form of the Dooryard Violet; the light purple variety were more common.

The
non-natives seen are two plants in the mint family and one in the mustard
family. The two mints are sometimes confused, but closer examination and
side-by-side comparison will reveal the obvious differences.

Hen Bit

Hen
Bit has long, reddish-purple flowers that are angled upward, toward the sky.
The upper leaves have no petioles; they clasp the square stems that are
characteristic of most mints.

Purple Dead Nettle

In
contrast, the other mint, Purple Dead Nettle, has light purple flowers that are
shorter and not as upward oriented. Its leaves have petioles to attach to the
stem and the whole plant, when viewed from the side looks like a pagoda.

Mustard
family plants are also called crucifers, which means, literally, “cross
bearer.” This refers to the flowers, which have four petals arranged in a
“+”, or cross shape. We found a tiny cruciferous plant, Hoary
Bittercress, with a few tiny flowers and several slender, elongate seed pods.
This type of seed pod is also characteristic of the mustard family. When ripe
they will explode on touch, hurling the seeds considerable distances.

Power line ROW to gate:

Green and Gold

We
walked up the ROW looking for Green and Gold, a pretty, ground hugging plant
with yellow flowers. Earlier in the week Emily and I found a single plant blooming,
and today the group found several more nestled at the base of the embankment
next to the path.

Dixie Reindeer Lichen

Toward
the top of the ROW, where the poor, red clay soil is exposed we found two
Lichens: numerous Dixie Reindeer Lichens looking like flattened white hemispheres
made of stiff string, and tiny Pixie Cup Lichens hidden among the mosses
growing on the bare soil.

Serviceberry or Bradford Pear?

Also
at the top of the hill, before the gate, was a tree/large shrubcovered with
white flowers. At first I thought this might be a Serviceberry, Amelanchier sp., but, on further
reflection, I think it might be an old Bradford Pear, escaped or left over from
before the Garden existed.

White/Red/White Trail:

In
the woods we saw no more wildflowers blooming but encountered several
interesting trees, shrubs and even animals.

A
Red-headed Woodpecker was sighted. It is nice to see this species in the Garden
again. There was once a large number of them nesting in the Beaver pond, but as
the dead trees in the pond decayed and disappeared the Red-headed Woodpeckers
did so also.

Look at the wings on that Elm!

Usually
when we see a Winged Elm we have to strain to see if the branches far up in the
canopy bear the lateral corky growths that give the tree its name. But we
sighted a young tree near the trail that had branches with the corky wings
about chest high. At last everyone was convinced that Winged Elm does have
wings.

Black Jelly Oyster Mushroom

Don,
always keeping a keen eye out for tiny lichens and mushrooms found a group of
tiny Black Jelly Oyster Mushrooms growing on a small, dead Sweetgum twig. Each
mushroom was only 1/4 inch or less in diameter!

The
Beech trees still have not dropped their leaves and the long, pointed buds
don’t show any signs of opening.

Blueberry blossoms

One
of our sharp eyed ramblers, Avis, spotted a Blueberry with a few flowers.
Without Hugh and Carol present to tell us what kind it is we have to call it
just Vaccinium sp.

Don called our attention to a Witches Broom on a small Hophornbeam. This strange growth is found on
several species of tree and is by a fungal infection

Witch‘s Broom on Hophornbeam

(or by the activity of insects
that might introduce a pathogen into the tree). The result is the rapid
proliferation of short, weak stems in one area of the tree. The dense, shrubby
growth resembles a bundle of twigs used to make a broom, thus the name.

But
why does the tree respond in this peculiar way? Just under the bark of a tree
are living tissues that can produce new branches. They are held in check by the
production of a plant hormone called auxin, which is produced by the growing
tips of each tree branch. When a branch is damaged, or cut off, the supply of
auxin is interrupted and the inhibition of the buds further down the branch is
released. There is another plant hormone, called cytokinin, that stimulates
cell division. Cytokinin can activate cell growth, even when auxin is present.
The Witch’s Broom is caused by the production of excess cytokinin by the
infectious agent. This releases the surrounding tissue from auxin inhibition
and rapid, uncoordinated growth ensues

Betsy Beetle

The
final surprise of the day was the discovery of a large beetle — a Bess Bug (or
Patent Leather Beetle, or Bess Beetle or Betsy Bug, take your pick). Emily
turned over a rotting log and, digging around in the crumbling wood came up
with a very cold, inactive Betsy Beetle. Placing it on my cold hand was enough
to warm it up and it began to walk about, although very slowly. These Beetles
are very interesting — a colony develops in rotting wood and the parents
actively feed their young. They also communicate with the young and other
adults by making a squeaking sound, caused by rubbing the tip of their abdomen
against their hard wind covers. We returned the beetle to its family in the log
and proceeded to return to Donderos’.

On
the way back we stopped to briefly admire a small Buckeye, its leaves freshly emerged from the
buds and just barely out of the ground. Buckeyes seem to be the first of the deciduous trees to break bud in the spring. And the first to shed their leaves in the fall. Is there a correlation?

Summary of Observed Species:

Common Name	Scientific name	Comment
Golden Ragwort	Packera aurea	blooming
Chattahoochee Trillium or Chattahoochee Wake Robin	Trillium decipiens	blooming
Small Bluet	Hedyotis pusilla?	blooming
Quaker Ladies	Hedyotis caerula	blooming
Field Pansy	Viola rafinesquii	blooming
Dooryard Violet or Confederate Violet	Viola sororia	blooming
Hoary Wintercress	Cardamine hirsuta	blooming
Henbit	Lamium amplexicaule	blooming
Purple Deadnettle	Lamium purpureum	blooming
Spiderwort	Tradescantia sp.	blooming
Green and Gold	Chrysogonum virginianum	blooming
Dixie Reindeer Lichen	Cladina subtenuis	blooming
Pixie Cup Lichens	Cladonia sp.	blooming
Service Berry	Amelanchier Canadensis	blooming
Winged Elm	Ulmus alata	blooming
Black Jelly Oyster Mushroom	Resupinatus applicatus	on Sweet Gum
Sweetgum	Liquidambar styraciflua
Blueberry	Vaccinium sp.	blooming
American Beech	Fagus grandifolia
Hop Hornbeam	Ostrya virginiana	with Witches Broom
Patent Leather Beetle	Odontotaenius disjunctus
Buckeye	Aesculus sp.
Red-headed Woodpecker	Melanerpes erythrocephalus