Content tagged with "plants"

Browning Leaves Indicate TCD

Photo shows walnut tree with browning leaves
In midsummer, TCD-infected trees may show wilted brown leaves on branches high in the canopy. More

Buffalo Bur (Flower and Leaves)

Photo of buffalo bur flower and leaves.
A spiny annual with bright yellow flowers and dandelion-like leaves, buffalo bur is an introduced member of the nightshade family. More

Buffalo Bur (Fruits and Leaf)

Photo of buffalo bur, spiny fruits and leaf.
The burlike prickles on the fruits of buffalo bur cause them to become attached to animal fur. This enables them to be dispersed away from the parent plant. More

Buffalo Bur (Plant with Flowers and Fruits)

Photo of buffalo bur plant showing flowers and fruits.
Buffalo bur is scattered nearly statewide. It occurs on banks of streams and rivers, disturbed portions of upland prairies, pastures, farmyards, roadsides, and other open, disturbed places. More

Buffalo Bur (Stems)

Photo of buffalo bur stems showing prickly spines.
The feet of livestock (and people!) can be injured by the spiny prickles of buffalo bur. Grazing animals’ mouths can be damaged by the spines, too. More

Bull Thistle

Photo of bull thistle, a spiny thistle with a pink flowerhead
Bull thistle is a weedy introduction from Europe, found statewide. To tell it from our other thistles, note its stems with spiny-margined wings, and its leaves with the upper surface strongly roughened with stiff, spiny bristles. More

Bull Thistle (Flowerhead)

Photo of a bull thistle flowerhead.
The flowerheads of bull thistle are reddish purple to purple, with a prominent involucre (the flowerhead base, covered by leaflike bracts), which is covered with a fine, cobweb-like silk. Spiny bracts grow right up to the flowerheads. More

Bull Thistle (Stem)

Photo of bull thistle showing stems with spiny wings.
Bull thistle has stems with spiny-margined wings. This trait, combined with the pink flowerheads, is a quick way to identify this common, weedy species. More