Portraits of Wildflowers

Perspectives on Nature Photography

Posts Tagged ‘yellow

Yellow water-lily

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Nymphaea mexicana; Lady Bird Johnson Wildflower Center; May 6th.

© 2018 Steven Schwartzman

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Written by Steve Schwartzman

May 21, 2018 at 4:43 AM

Posted in nature photography

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Two-leaf senna

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Here’s a native wildflower I’ve never shown you before. That’s surprising, given that it grows in my neighborhood and that on several occasions I’ve shown the other species of senna that grows here. This one is Senna roemeriana, known as two-leaf senna or two-leaved senna. The common name refers to the fact that each of the plant’s leaves is made up of two leaflets; you can see one leaflet and part of its symmetric twin at the lower left in the photograph.

I took this picture beneath the power lines west of Morado Circle one month ago today.

© 2018 Steven Schwartzman

Written by Steve Schwartzman

May 17, 2018 at 4:52 AM

It’s been a good spring for the Engelmann daisy

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Click for better clarity.

That’s right, it’s been a good spring for the Engelmann daisy, Engelmannia peristenia, the wildflower you got a good look at yesterday. Above you see a flourishing colony of Engelmann daisies along Gattis School Rd. in Round Rock on April 16th. The white flowers are old plainsman, Hymenopappus artemisiifolius. In the back left you can make out some bluebonnets, Lupinus texensis, and greenthreads, Thelesperma filifolium. Below is a little closer view of a part of the Engelmann daisy colony.

Did you know that Engelmann in German means Angel Man?

© 2018 Steven Schwartzman

Written by Steve Schwartzman

May 8, 2018 at 4:47 AM

Engelmann daisies

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I know the Engelmann daisy, Engelmannia peristenia, only from central Texas, yet the USDA map shows a distribution up through the Great Plains into South Dakota. Botanists refer to the genus Engelmannia as monotypic, meaning that it contains just one species. Call that species an only child and no one will fault you for the analogy.

The picture above shows the bud of an Engelmann daisy opening in front of an Indian paintbrush, Castilleja indivisa. The photograph below lets you see what the open and opening flower heads of an Engelmann daisy look like. Both pictures are from Blackland Prairie remnants in Round Rock on April 8th.

© 2018 Steven Schwartzman

Written by Steve Schwartzman

May 7, 2018 at 4:59 AM

Mayday

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Today’s date reminds us that Mayday is a call of distress and a plea for help. Some help is what these conjoined flower heads of greenthread (Thelesperma filifolium) could have used in warding off attacks from at least two kinds of insects: in the first picture I see several thrips and one tumbling flower beetle.

The view from the other side shows you how the two flower heads were conjoined. As far as I can remember, this was the first such greenthread I’d ever seen. From time to time I’ve shown instances of fasciation but it’s not clear if this twin flower head counts as that.

The date was April 16th and the location was the Blackland Prairie just east of Louis Henna Blvd. and Donnell Dr. in Round Rock.

© 2018 Steven Schwartzman

Written by Steve Schwartzman

May 1, 2018 at 4:44 AM

Two closer looks at Texas dandelions

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The previous post showed you a happy colony of Texas dandelions, Pyrrhopappus pauciflorus. Above is a closer look at a single flower head of one that I found growing by a colony of bluebonnets along Sam Bass Rd. in Round Rock on April 8th. Below from the same location is a Texas dandelion that had already gone to seed and formed the familiar puffball.

© 2018 Steven Schwartzman

Written by Steve Schwartzman

April 27, 2018 at 4:55 AM

Texas dandelions en masse

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Behold a colony of Texas dandelions, Pyrrhopappus pauciflorus, flowering near a pond on the Blackland Prairie in northeast Austin on April 16th. This wildflower has occasionally been called a false dandelion because it’s the true one here.

There were parts of the site where pink evening primroses, Oenothera speciosa, outnumbered the Texas dandelions.

© 2018 Steven Schwartzman

Written by Steve Schwartzman

April 26, 2018 at 4:52 AM

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