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Content tagged with "plants"

black-walnut-catkins

Black Walnut Catkins

Male flowers appear in drooping catkins when leaves emerge in spring.

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Black Walnut Tree

Black walnut trees grow up to 90 feet tall with a rounded, open crown.

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Black Walnut Twig Cross Section

Twigs thick, light brown, with fuzzy buds and tan, chambered pith at the core of the twig.

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Illustration of black willow leaves and catkins.

Black Willow

Black willow, Salix nigra.

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Photo of black-eyed Susan plants blooming along the edge of a field.

Black-Eyed Susan

Black-eyed Susan commonly grows in pastures, old fields, railroads, roadsides, and open, disturbed areas. This is the most abundant rudbeckia in Missouri and the one that prospers best in disturbed habitats.

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Photo of black-eyed Susan flowerhead with a beetle on it.

Black-Eyed Susan

In the 1970s, researchers explored the different patterns of reflected ultraviolet light in the corollas of this and other rudbeckias. Although UV light is invisible to humans, bees and some other insects can see it, and the special patterns in the flowers serve especially to attract them.

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Photo of black-eyed Susan flowerhead.

Black-Eyed Susan

Black-eyed Susan flowerheads are solitary or in loose, open clusters, terminal on the stalk, and grow to 4 inches across. The 8–21 ray flowers are rich yellow or orangish and slender. The central disk is deep brown to purple-brown and hemispherical, becoming egg-shaped with maturity.

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