Seeds
by
Margaret Stewart
Have
you seen this summer’s crop of seeds?
They lie on the ground, they hang from the trees and shrubs, they
hook onto your socks. They
crunch under your feet and have to be swept off your patio.
It’s feasting time for desert birds and beasts.
The
rains of winter and spring produced flowers in extravagant abundance, and
this profusion of fruits has followed.
Desert plants exist and thrive because of their
amazing abilities to take advantage of whatever Nature provides.
This year the frequent rains made seeding easy, and the chances of
propagating their kind were increased.
Now they must rely on Nature’s whims to get their seeds planted
in the right ground and to provide the right conditions so they can sprout
and put down roots in this harsh environment.
It’s a huge gamble. Few
seeds will get that far; fewer still will grow to maturity.
In
addition to providing heaps of seeds, many enterprising desert plants have
developed amazing techniques to give their offspring a great sendoff.
The ripe fruit of a barrel cactus may be whisked away by a passing
ground squirrel, allowing the fine black seeds to drizzle out of its top
like salt from a salt shaker. Seeds from bursage, sand burrs and brittle grasses not only
torment you, but cling to animal fur as well, traveling miles until
released.
The
devil’s claw, an annual, must work fast to give the next generation a
boost. Its seed pod has
wicked hooks that can fasten around an animal’s leg until it is roughly
kicked away, scattering out the seeds at the same time.
Some
plant mothers depend on animals to eat their brood, which pass through
digestive systems that break down their hard shells and then deposit them
in another location. Check
out the next pile of coyote dung you find for the smooth oval seeds of the
coyote melon (gourd).
Birds
that flock to the saguaro fruit will help that slow-growing giant extend
its habitat when they eat the seeds along with the sweet red flesh and
then drop them in new locations. The
sleek, black phainopepla does the same job for the mistletoe.
Seeds
from some shrubs travel by air. Female
plants of the desert broom develop millions of silky white seeds that
float on the winds of late summer and collect in drifts along roadsides
and arroyos, where they have a better chance of being drenched by rain. The insignificant flower of the paper bag bush is attached to
a tiny white balloon, so it can bounce across the desert when propelled by
a breeze.
But
what if, at its arrival in a new location, the seed finds that the sun is
too hot and the rains don’t come? Well,
many of them will wait, a decade or more, in their hard shells for Nature
to supply the kind of rains we had in the winter of 2000-2001.
Then they will stir and sprout and cover the hillsides with brief,
heart-stopping beauty for us to enjoy until the essential seed making
process begins once more.
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