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what weed has a big seed in the middle

Paspalum is a grassy weed with larger, broader, longer leaves. It grows in a cluster and is quite obvious to see in your turf. It comes in many varieties. Removing paspalum by hand involves digging the plant out of the ground, and the roots must also be removed. Selective herbicides are available to control this weed. These can usually be used on couch, bent grass, fescue and ryegrass lawns, but cannot be used on buffalo, kikuyu or saltene/bahia lawns. Always check…

Catsear, also known as flatweed, is similar to dandelion but are different species. The two plants look similar, have similar features, and are also treated the same. The lifecycle of the Catsear and dandelion can be controlled by regular lawn mowing whenever its flowers or seed heads are apparent. By constant removal of its seeds, the weed misses its only means of reproducing. Hand weeding is also an easy and effective control. Both selective and spot application of non-selective herbicides can…

Onion Grass is a perennial grassy weed with between three and 10 thin, strappy leaves rising from the central base up to 30 cm long. The leaves are up to 2 mm wide with a prominent central midrib that protrudes to create an almost cylindrical leaf blade in cross section in a spear and quite a tough point. Flowering in spring, the onion grass plant produces two to four small flowers per plant that are positioned around the base of…

Crowsfoot / Crabgrass (Eleusine Indica)

Nutgrass is a perennial rapidly spreading grass-like sedge with flat, tapered and corrugated foliage. The stem is triangular in cross-section, a feature which is unique to sedges. The name nutgrass comes from the nut-like tubers found on rhizomes under the surface. These “nuts” serve as energy storage for the weed which are the reason the weed is difficult to control. The weed seeds from summer through to autumn, with yellow-brown seeds arranged in narrow spikes. Nutgrass propagates from both seed…

Pearlwort is a dense, low-growing broadleaf weed with smooth, slender stems rooting at the nodes. Oppositely arranged, thin, grassy like leaves up to 14 mm long branch out from the stem at close intervals, not broadleaf in appearance. These heavily branched stems form a mat-like growth habit that forms thick ground cover. Small, inconspicuous flowers appear in spring, summer and autumn, with green sepals and tiny white petals. Flowers remain closed in buds and are visible only briefly as they…

Chickweed is a common weed. With many varieties, ‘Common Chickweed’ is the most encountered. A small plant with shiny leaves with multiple stems, Chickweed produces a single white flower on each stem. Its invasiveness into healthy lawns is rare and it doesn’t like to compete. Chickweed prefers to germinate and grow barer patches of turf. Chickweed cannot recover from the loss of its foliage, so regular mowing of lawns ensure its eradication – which is another reason chickweed is rarely…

Summer grass is common in Australia’s lawns. It is a very fast-growing weed which sends out its shoots in all directions from its centre and spreads through stolons (above ground runners). Summer grass stems are either brown or red, with thin grey-green leaves and fine vertical seed heads that are spiky. A vigorous seeding plant, summer grass needs to be removed from lawns immediately. It’s like your lawn – lawn mowing has no impact on its control or growth, other…

Although not typically a problem, dust can cover plants growing near roadsides. Herbicides, particularly glyphosate, can readily attach to dust or soil particles, thus reducing their effectiveness.

All photos from J.M. DiTomaso and E.A. Healy, Weeds of California and Other Western States, 2007.

BIOLOGY

I personally find this plant quite interesting. As a native to portions of the United States, it turns out this plant has a diverse history and in recent years it is being studied in cutting edge medical research and energy technology. Have I perked your interest? If so read on.

Chemical Control