Notes from the 3rd class of the Botany Conservation Course
by Course Volunteer Phyllis Daniels & Course
Coordinator Mary Kiesau
Dana started off
the class with a “side-bar” discussion of plant intelligence.
The Intelligence of Plants
Bristlecone Pine Photo: Chris de Rham/Flickr/Creative Commons License |
Plants show an incredible amount of “wisdom” in their adaptations,
if we apply human values to them. Plant
don’t have a brain (as we think of a brain) but they have to do a lot to stay
alive, not the smallest of which is to get all of their needs met while staying
in one place. The hero of the plant
world - the Bristlecone Pine - is the longest living being on earth. The oldest living organism is a Bristlecone
pine in Nevada
that is 5063 years old – just imagine, it has responded and adapted to and survived
all the climate extremes from glaciers to drought over the last 5000 years.
We should rethink our idea of movement when it comes to
plants. For instance, bunchberry’s
little flowers open and explosively shoot out pollen at 500 mph (the speed of
sound and 1000x the force of gravity). Why? Possibly because they grow low to ground in
thick forests so they needed to adapt to a world where there is a lack of wind
and few insects. Another example of movement is with mistletoe that
grows on Douglas fir. Mistletoe spreads through
fir stands by shooting out sticky seeds at 50 mph that hit another tree and
stick to it like glue and then grow.
The Bee Orchid |
Many flowers, particularly certain orchids, have evolved to look
(and sometimes smell) like a female insect in order to attract the male insect
of that species. These plants are called
“deceptor pollinators,” Out of 22,000 species, one third are deceptor
pollinators. In the Methow, the Fairyslipper or Calypso orchid is a
deceptor pollinator.
Plants too seem to have a sense of smell. Dodder doesn’t photosynthesize because it is
a parasite plant. When offered green wheat or a tomato to eat it chose
the tomato - suggesting it could smell. Even when blowing only the scent
of the two plants the Dodder choose the tomato.
Another plant adaptation are attempts to keep herbivores from eating/killing
them. Some plants have created toxic
chemicals, such as nicotine, morphine and caffeine, to repel herbivores. Western water hemlock is considered the
deadliest plant in North America killing
livestock with just a few nibbles.
Some plants have adapted ways of eating insects such as the venus
flytrap, bladderwort and butterwort.
Venus flytraps conserve energy by waiting until 2 tiny hairs inside the
“trap” are triggered by the pray to be sure it is big enough prey to make it
worth their while to close. This plant seems to have a memory of 20
seconds between when an insect touches one hair until it touches the second.
Bladderwort can catch small fish and tadpoles using water pressure. Butterwort is carnivorous
plant that catches flies with sticky leaves.
Look for it in wet meadows in the North Cascades.
Dana then switched gears to
teaching the last several plant families in our GILF presentation. We reviewed what we learned in the previous
two classes, then moved on to learn the basic characteristics of the families
in “10 or More Stamens” Group, the “Families with Fused Petals” Group, and the
“Families with Free Petals” Group. But
remember, when placing a plant in one of the seven ID Groups, you start with
Group 1 and move through each group in numerical order deciding whether it fits
or not.
The “10 or More
Stamens Crowding the Center” Group (Group
5) includes the Buttercup and Rose families.
We learned these families in the first night when they were initially in
the “Central Clusters” Group, but Dana revised the groups.
Buttercup Family - This family can also be
in the Bilateral Symmetry Group, but most have radial symmetry. Buttercups usually have 5-12 petals with
simple to elaborate flowers. They
usually have more than one pistil (female part), and they have 10 or more
stamen (male part). The “look” is one of
many pistils and numerous stamens.
Includes: Anemones (fern-like leaves); Marsh Marigold (big round to
heart-shaped succulent leaves); Buttercups (leaves mostly basal and
palmately three-lobed; usually 5 petals
and always very shiny); Columbine; Meadowrue (male and female flowers are on
different plants, wind pollinated; leaves in 3’s and 3 lobed)
Rose family
- 48 species in the Methow with extensive variation. Includes trees, shrubs, annuals &
perennials. In all genera, there are
multiple pistils and numerous stamens.
There are always 5 petals & sepals.
Most flowers are large & showy and there is often large, fleshy
fruit (strawberries, raspberries, rosehip, etc.). No common pattern for the leaves except for
the smaller plants, like brambles, you get a sense of 3 to 5 leaflets, mostly
basal and toothed.
Three common genera are: Cinquefoil (Potentilla), Brambles (Rubus)
and Spirea (Spiraea). Cinquefoils can be
hard to tell apart from buttercups.
Cinquefoils have sepals and buttercups don’t. Pull a petal off on a buttercup it has a
nectary at the bottom of the petal and cinquefoils don’ts. Cinquefoils are very shiny, and their leaves
are more toothed. Brambles almost always
have white flowers (salmonberry have pink) and their fruit is usually a
many-seeded pod. Spireas are small to
medium shrubs with large round or long/erect clusters of tiny flowers.
The “Families with Fused
Petals” Group includes the Heather or Heath
Family, the Borage Family, the Phlox Family and the Primrose Family. (ID Group
6)
Heath Family
– A very diverse family from saprophytes to trees but all with flowers that are
bell or urn shaped (some are more open than others).
·
The
saprophytes are parasites on a fungus in the ground. They don’t photosynthesize but live on dead
or decomposing matter. Includes pinesap, pine drops and indian pipe.
·
Heathers
are evergreen shrubby mats with needle or scale-like leaves
·
Other
genera with closed bell/urn flowers are blueberries (vaccinium), kinnikinnick
and salal.
·
Genera
with more open bell-shaped flowers include wintergreen and rhododendron
Borage Family – Large family that can be hairy, have fiddleheads,
a central bullseye in the flower, and/or have long flaring tubes of flowers. Six common genera are:
- Cryptantha - smallish, coarsely hairy, most have fiddleheads
- Fiddleneck – distinct fiddlehead, bristly hairs, flower a narrow tube
- Puccon – hairs not obvious but plant is scratchy, flowers not in fiddlehead but short tubes
- Stickseed – flower a short flaring tube with a colored ring in the center
- Forget-Me-Nots – like stickseed but smaller, slender and weak
- Bluebells – flower tube is closed, bell-shaped and droopy
Phlox Family – The GILF is: flower has fused petals in a long
narrow tube with perpendicular lobes; leaves are narrow or ladder like. Four
common genera are: Collomia, Gilia,
Phlox and Jacobs Ladder
Primrose Family – family characteristics are mostly technical; they generally
prefer moist soil, The flower “Shooting
Star” is our most common Primrose.
A special family that is
not in any of our Groups is the Currant Family.
Currants are medium-sized shrubs with maple shaped leaves, and
edible (not always palatable) berries.
There are several species of currant in WA.
The “Families with
Free Petals” Group includes the Stonecrop
Family, the Saxifrage Family, the Purslane Family and the Pink Family. Remember from ID Group 3 onward, the flowers
have parts in 5 or multiples of 5. These
family all generally have five petals, just like the last group, but these
petals are free not fused.
Stonecrop Family – distinct in that they are small succulent plants that grow in
dry, rocky places. Also known as Sedums,
which is the genus.
The GILF of Saxifrage |
Purslane: two green sepals & pink stripes |
Pink Family –
GILF cleft or split petals (some so deeply they look like 10 petals), ovary
superior and bulbous, leaves usually narrow, always opposite, and borne on
swollen nodes on stem. Genera include:
Starwort, Silene, Chickweed and Sandwort.
Whew!
No comments:
Post a Comment