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| Tomcat clover (Trifolium willdenowii) in Mother Nature's Garden of Health |
‘A
cute little wildflower, delicate in appearance’ - this description fits many of
our native annual wildflowers. But this
month’s ‘Plant of the Month’ comes with a surprise; it’s actually a clover!
This cute little wildflower is blooming right now in Mother Nature’s
Garden of Health. For more on the garden
see: http://mother-natures-backyard.blogspot.com/2014/03/our-new-garden-mother-natures-garden-of.html
Tomcat
clover is one of over fifty species and sub-species/varieties of clover native
to California. Most grow in regions far moister
than western Los Angeles County; but at least 10 species are native to the
area, including those from the Southern Channel Islands (San Clemente and Santa
Catalina Islands).
Tomcat
clover (Trifolium willdenowii) is
widely distributed from British Columbia, Canada, to South America. It can be found throughout much of the
California Floristic Province (west of the Sierra Nevada Range). Locally it still grows in the foothills of
the Santa Monica and San Gabriel mountains; early records also place it in coastal
Los Angeles County, in areas that are now entirely developed.
Clovers
are members of the legume/pea family (the Fabaceae or Leguminosae). In
addition to containing important food plants, the legume family is known for its
relationship with nitrogen-fixing bacteria.
Certain soil bacteria (the nitrogen-fixers) form nodules within the
roots of many legumes. The modified
bacteria obtain their food from the plants; this ‘food’ provides the energy
needed to convert gaseous nitrogen to nitrogen forms that can be used by plants.
Farmers
often use clovers as a fallow crop. By
planting clovers on ‘resting’ fields, then allowing the roots to break down in
the soil, farmers improve the soil’s nitrogen supplies. This easy, natural method of fertilizing
soils has been practiced for a long time.
Native clovers can be used in a similar way in vegetable gardens.
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| Tomcat clover (Trifolium willdenowii) - foliage |
Tomcat
clover is a small annual or short-lived perennial in our area. Growing 1-2 feet tall and about as wide, the
plant has the delicate herbaceous stems we associate with clovers. The
leaves, while composed of three leaflets (as expected for a clover) look less
like the common ‘shamrock’ than one might expect. As seen above, the leaflets are narrow – sometimes
almost linear – giving the plants a delicate, open appearance. Plants have a deep taproot, making them more
drought tolerant than some wildflowers.
In winter-warm areas they may spread via their roots, sometimes forming
large colonies in the wild.
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| Tomcat clover (Trifolium willdenowii) - flowering plant |
Tomcat
clover blooms in spring, anytime from March to May in western Los Angeles County. The tiny flowers grow in ball-shaped
clusters typical of clovers. The flowers
range in color from pink to purple; the colors are more intense in sunnier
locations. From a distance the flowers
are delicate, old-fashioned and decidedly pink-purple. But if you haven’t looked closely at a clover flower
you might want to do so – they’re more interesting than you might imagine!
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| Tomcat clover (Trifolium willdenowii) - close-up of flowers |
As
seen above, the petals are fused into a tube that’s lavender or purple and may
have darker veins. The lobes (wings) of
the tube resemble the ‘banner’ and ‘keel’ of other peas (for example, Sweet
peas or Lupines) though less clearly defined.
The upper (‘banner’) lobes are shades of purple/violet while the lower (‘keel’
lobes) are usually white tipped with a blotch of darker purple/magenta. All
but one of the yellow-colored stamens (pollen producing organs) are fused. In sum,
the flowers are very decorative and attractive.
Tomcat
clover is not too particular in its growth requirements. It likes a well-drained soil, but does fine
in many clay soils; it’s also slightly tolerant of salty soils. While it grows
in both full sun and part-shade, we’ve found it does best in areas with some
afternoon shade in our area (during its winter/spring growth period). Like all
annual wildflowers, it needs moist soils until it flowers.
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| Tomcat clover (Trifolium willdenowii) - young seedlings |
Tomcat
clover is a typical annual wildflower.
It germinates or starts to grow in wet winter/spring soils. The photo above shows that seedlings look
much more ‘clover-like’ than do the mature plants. In fact, most clovers look quite similar as
young seedlings; so you have to wait for the distinctive mature leaves to
develop before deciding whether it’s a desired native clover or invasive alien. Trifolium willdenowii flowers in warm
spring weather, then sets seed and dies back with the heat and drought of late
spring. Begin to withhold water as plants start to
flower, then taper off to none as the seeds develop. You can collect and store the dry seed – or let
the plants drop their seed and naturalize.
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| Tomcat clover (Trifolium willdenowii) in the garden |
There
are many good reasons to include Tomcat clover in the garden. As noted above, all clovers improve soil
nitrogen (leave the roots in the soil when you cut off the dead stems). They also attract native insect pollinators
and seed-eating birds. But the California
clovers have even more to offer. Native
Californian recipes utilize young plants for raw or cooked greens. In the past, plants/leaves were also dried
for later use in soups, stews, baked goods and other dishes.
The
seeds are also delicious – raw or parched.
They can be ground and used as a thickening agent in soups, stews and sauces;
they can also be used in baked goods. The flowers of native clovers can be used for
making tea or in baking. The tea was used to treat gastrointestinal disorders
and joint aches; steam from boiling flowers was formerly inhaled to clear head
colds.
In
summary, Trifolium willdenowii is
both a charming and useful plant for the home garden. It can be tucked into small areas, or grown
between shrubs. It makes a good cover
crop in the vegetable garden or orchard.
It even makes an enchanting little container plant. We hope you’ll want to add some native clover
to your garden.
For
a gardening information sheet see: http://www.slideshare.net/cvadheim/gardening-sheet-trifolium-willdenowii
For more
pictures of this plant see: http://www.slideshare.net/cvadheim/trifolium-willdenowii-web-show
For plant
information sheets on other native plants see: http://nativeplantscsudh.blogspot.com/p/gallery-of-native-plants_17.html
We
welcome your comments (below). You can
also send your questions to: mothernaturesbackyard10@gmail.com
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