Many thanks to the students from UWGB's Round River Alliance
and the Conservation Biology class who helped pull Garlic Mustard
today on UWGB and in neighboring forests. Garlic mustard
(Alliaria petiolata) is an invasive alien plant species that,
left unchecked, will take over the forest floor and displace our
native plant species. To learn more about garlic mustard visit our
plants web site.
Fraxinus pennsylvanica (green
ash) is in flower today (pollen released), Brown County,
Viola blanda (sweet white violet) and at least 2
species of Amelanchier (juneberries) in flower, Shawano
I haven't abandoned this listing--the cold, cloudy weather
has brought development of the plants to a crawl. Daytime temps have
been in 40's and 50's with low temperature mostly in the low 30's
since the 21st. Many species are poised to flower as soon as sunny,
warm weather returns and many of the spring and early summer plants
are recognizeable as the emerge.
The U.S. Army Corps of Engineers recent data show the water
level in Lake Michigan is up about 6 inches from last year at
||Amelanchier arborea (downy Juneberry,
common shadbush) is in flower in our Lenfesty courtyard, UWGB.
Based on plants I saw last Sunday, I suspect that the early Juneberries
are in flower in the wild also. Wisconsin is home to 6 species of
Juneberries and they can be very difficult to distinguish. A. sanguinea
and A. laevis appear to be the most common species in the Green
Painted Lady butterfly observed on UWGB.
Veronica arvensis (corn speedwell), Thlaspi arvense
(field pennycress) in flower, UWGB.
Ribes tristte (swamp red currant) in flower, Brown
Chamaedaphne calyculata (leather-leaf) in flower,
||Cardamine concatenata (was Dentaria
laciniata, cut-leaved toothwort) in flower, UWGB.
Taraxacum officinale is now numerous in some lawns, but is still
not close to peak flower, City Green Bay.
White pelican, Green Bay, lower Fox River (Kate Hutton).
The first flowers are open for Cardamine douglassii (limestone
bitter-cress), Asarum canadense (wild ginger)
and Euphorbia cyparissias (cypress spurge), UWGB.
Betula papyrifera (paper
birch)in flower (dispersing pollen), UWGB.
American Toads calling, UWGB.
Populus tremuloides (quaking
aspen), Acer negundo (box
elder), Lonicera xbella (showy bush honeysuckle)
and Ribes americana (American black currant) are rapidly
leafing out in the Green Bay area.
A much-needed rain fell in northeastern Wisconsin last night,
with 0.86 inches before midnight. There have been grass and brush
fires in northeastern Wisconsin every day for the last week or more.
This morning I heard the first Leopard Frogs calling, Brown
County, City of Green Bay.
One Acer platanoides (Norway
maple) tree is in flower in the lawn near MAC Hall.
Capsella bursa-pastoris (shepherd's-purse) in flower,
Taxus cuspidata (Japanese
yew) in flower (pollen dispersed), UWGB. This species is
strictly horticultural here and does not grow out of cultivation.
First cabbage butterfly I've seen, UWGB.
Salix bebbiana (Bebb's
willow) in flower (pollen dispersed), City of Green Bay.
Heard first leopard frog calling this morning. This evening,
first American toads and Gray Tree Frogs calling following
thunderstorms. Unusually warm weather for the past few days has
resulted in rapid leaf expansion in choke cherry, black raspberry,
and trembling aspen, Manitowoc County, Town of Cooperstown (Joel
Several people on The Wisconsin Birding List report the departure
of overwintering juncos; numbers at our feeders have declined,
but several juncos were still present as of this morning, Manitowoc
County, Town of Cooperstown (Joel Trick).
Glechoma hederacea (gill-over-the-ground) in flower,
Barbarea vulgaris (yellow rocket) Brown County, Bellevue.
Today is the first day I've seen tiger beetles (Cicindela
sexguttata, I think) on the arboretum trails (Mike Draney).
Erythronium albidum (white trout-lily) in flower,
UWGB. [the advent of cold and cloudy weather has kept further flowering
of this species to a minimum until after May 3, gf]
Acer negundo (box
elder) in flower (pollen dispersed), City GB.
There are also reports of Sanguinaria canadensis (bloodroot)
in flower in Brown County.
Lake Sturgeon were spawning in the Wolf River today, but
I don't know when they started.
Carex pensylvanica (Pennsylvania sedge) in flower
(releasing pollen), UWGB.
Isopyrum biternatum (false rue-anemone), Claytonia
virginica (spring beauty) in flower, UWGB.
Equisetum arvense (common
horsetail) releasing spores, UWGB.
Sanguinaria canadensis (bloodroot) in flower, Brown
County (Kathy Groves).
Wood turtle, Oconto County (Tom Erdman).
Juniperus chinensis (Chinese Juniper) in flower (anthers
releasing pollen), UWGB.
Populus deltoides (eastern
cottonwood) in flower (releasing pollen), UWGB. These are
plants on disturbed soil at UWGB and at various places in City of
Green Bay. Plants in the more natural wet sites are a bit later.
My long-term phenology tree for P. deltoides at UWGB began to release
Forsythia (Forsythia, or golden bells) in flower,
DePere (Kathy Groves).
Larix decidua (European Larch) horticultural planting
is in flower (pollen released), UWGB.
verna (spring whitlow-grass), in flower, Brown County.
Garter Snake out and about, Brown County (Kathy Groves).
Anemone acutiloba, formerly Hepatica acutiloba (sharp-lobed
hepatica) in flower, Brown County (Kathy Groves).
First Red Admiral butterfly report, Brown County, Nick Walton.
Painted Turtle sunning on a log in the river, and Wood
ducks return, Shawano (Joel Whitehouse).
humilis (prairie willow) and Androsace occidentalis
(rock-jasmine)in flower (pollen dispersed), UWGB.
grandidentata (big-tooth aspen) in flower (anthesis), UWGB.
rubrum (Red Maple) in flower (anthesis), UWGB.
Suckers (fish) are moving up Mahon Creek, to begin the spawning
Anemone acutiloba, formerly Hepatica acutiloba (Sharp-lobed
Hepatica) in flower, Shawano County (Joel Whitehouse).
americana (American elm), Ulmus
pumila (Siberian elm) and Salix
discolor (pussy wiillow) in flower (anthesis),
The first flowers of Caltha palustris (marsh marigold)
are open, Brown County. These plants are in flowing springs that
keep the ground from freezing in winter and give the plants a headstart
in the spring. Plants not in springs may not flower for another
week or two.
Mourning Cloak butterfly observed, City of Green Bay (Heather
Wood Frogs calling in Shawano Co (Joel Whitehouse).
occidentalis (white cedar; arbor vitae) has begun to
flower (anthesis) on upland sites in Green Bay. The flowering cones
are so small that they are often overlooked.
||The ice is off Prairie Pond at UWGB
today. It froze fully and stayed frozen Dec 14, for an ice-covered
period of 112 days. Last year the ice came off Prairie Pond March
26. The average date is March 27 (for 9 years of data).
||Spring Peepers (frogs) calling at
night, Pensaukee, Oconto County (Tom Erdman).
(Quaking Aspen) in flower (anthesis), UWGB.
Taraxacum officinale (dandelion) in flower, UWGB.
These are the first flowering plants of dandelion that I have seen
this year. The site is a lawn on a south facing slope at the base
of a brick wall, where the soil warms much earlier than the surrounding
lawns and fields. The average date for this population to flower
is April 9, about 15 days earlier than dandelions in the open lawn
away from buildings.
americana (American hazelnut) in flower (anthesis)
(Speckled alder or tag alder) in flower (anthesis),
Brown County, Baird Creek area.