Thursday, October 7, 2010

Wickham Park: Primrose Willows, October 7, 2010

This post shows the differences between Mexican and Peruvian primrosewillows. It also includes a new discovery, lopsided indiangrass, plus a revisit of a couple of familiar wildflowers.
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Peruvian primrosewillow (Ludwigia peruviana, Onagraceae)
Not native

This is one of three species of primrosewillow in Wickham Park. Peruvian primrosewillow generally has large, slightly overlapping petals, and stubby seed capsules. The bottom right photo shows the traceability of the flower parts to the end of the capsule after the flower has fallen off.
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Mexican primrosewillow (Ludwigia octovalvis, Onagraceae)
Native

This primrosewillow has reddish stems and long, pencil-like seed capsules. Both primrosewillows are found in the southern states from Texas to the Carolinas.
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Lopsided indiangrass (Sorghastrum secundum, Poaceae)
Native

A new find. A tall grass with pretty golden flower & seed heads. Prominent yellow anthers dangle from thin threads.
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Carolina yelloweyed grass (Xyris caroliniana, Xyridaceae)
Native

One of the characteristics of this plant is that its stems are twisted.
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Vanillaleaf (Carphephorus odoratissima, Asteraceae)
Native

Leaves have a vanilla odor, especially when dry.
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Spider

I found this interesting spider with its captured prey in the lower leaves of a vanillaleaf plant.
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1 comment:

  1. This is a wonderful set of photos and you just helped me identify my Ludwigia! Your photo of the spider is fascinating. May I share it on a spider identification page if I credit you? What would even be better is if you'd put a watermark on the photo, so anyone referring to it or sharing it would know its origin.

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