Author: Roberta (Page 197 of 562)

Seed of the Week: Texas Ebony

Our mystery legume seeds from last week were from the Texas ebony tree, Ebenopsis ebano (formerly Pithecellobium flexicaule).

texas-ebony-side-of-treeThe Texas ebony tree, as its name suggests, is originally from Texas, but it also does well as a landscape tree in Arizona. It is slow growing, eventually becoming good-sized tree.

texas-ebony-branchAnother common name is “ape’s earring” because of the large, persistent seed pods.

The tree is also known for its lovely dark green foliage, much darker than most desert trees.

texas-ebony-seed-podAn unusual characteristic of Texas ebony is that the branches change direction at each node, giving an up-down zig-zag appearance. It also has thorns.

texas-ebony-flowersThe flowers are creamy-white puffs, similar to acacia flowers.

Texas-ebony-bark

The bark is gray and fissured.

So, why is the tree called Texas ebony? It turns out the heartwood is dark red to purplish, sometimes almost black, so it resembles ebony wood.

Have you ever seen a Texas ebony tree?

Bug of the Week: Tarantula Hawk Wasps

Would you believe a wasp may be important to the survival of certain butterflies?

taratula-hawk-wasp-head-view

Tarantula hawks are large, colorful wasps in the genus Pepsis. They are found throughout the southwestern United States.

tarantula-hawk-wasp-2014

The tarantula hawk has a special relationship with the desert or rush milkweed plant (Asclepias subulata). Its slender legs fit into special grooves in the flower while it is drinking nectar. The grooves contain bundles of pollen called pollinia. The pollinia catch on the wasp’s legs.

Tarantula-polliniaSee the pollinia on this wasp’s front leg? When the wasp flies to another milkweed plant, the pollen is transferred and the plant is pollinated.

If a milkweed is successfully pollinated, then it produces seeds, which means more milkweed plants. Milkweed is a larval food source of monarch and queen butterfly larvae.

So, in addition to being fascinating creatures in their own right, these tarantula hawk wasps are helping the monarch and queen butterfly survive.

Do you have any milkweeds growing in your yard? What insects do you see visiting?

Mystery Seed of the Week 206

 

mystery-seeds-206-1These mystery seeds are from a southwestern tree.

mystery-seeds-206-2The seeds are quite large, perhaps as big as the tip of your finger.

mystery-seed-206-podWill the open seed pod will help you decide?

Do you recognize what plant these seeds are from? If you choose to, please leave a comment with your ideas.

New mystery seeds and Seed of the Week answers are posted on Tuesdays.

Edit:  The answer is now posted.

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