Category: Trees (Page 7 of 17)

Seed of the Week: Common Figs

The mystery seeds from last week were indeed from figs, as alert readers Heather and Shannon correctly surmised.

The seeds are from a dried fruit of the common fig, Ficus carica.

Figs are sweet and eaten both fresh and dried. They are used in cooking and baking, such as the fig cookies I mentioned. Figs are nutritious, being high in calcium and fiber.

Common fig trees are frost sensitive, so they grow in warmer climates. Figs grow here in Arizona. California is known for its commercial fig production.

The common fig is easy to recognize because leaves are deeply lobed.

The cultivars of figs that are eaten fresh can self-pollinate, and thus produce fruit without help of pollinators.

The cultivars of trees used to produce dried figs, however, require tiny wasps for successful pollination and fruit production. In what is probably one of the most complex forms of pollination in the world, the fig wasps ( Blastophaga psenes) develop within a swollen structure that resembles a fruit, but which actually contains the fig flower. The emerging female wasps pick up pollen (while still inside), crawl out off a hole dug by the male wasps, and then fly on to another fig to pollinate it. This from wasps so tiny and fragile that a slight breeze could blow them away. Cool!

The creeping fig vine from Asia, Ficus pumila, will also grow in Arizona. Recently ours has started to produce these fruit-like structures. The creeping fig is pollinated by another fig wasp, Blastophaga pumilae. I understand it is possible to make a jelly from these figs.

The Nature program has a show about a related fig tree from Kenya. It is called the sycamore fig, Ficus sycomorus. It is also pollinated by tiny wasps. Here’s the beginning part, which actually captures some of the wasps in action.

Figs are definitely interesting plants.

For more extensive information about figs and fig wasps, see:

Fig information from South Africa

Are you using any figs for cooking this holiday season? Do you have any favorite fig recipes?

Mystery Seed of the Week fans: Mystery Seed will resume next Tuesday.

Seed of the Week: Osage Orange

As Rebecca correctly identified, the mystery seeds last week were from an Osage orange tree, Maclura pomifera. Osage orange has an interesting history.

Let’s take a look at the name first. The name Osage comes from the American Indian tribe. The Osage Indians apparently prized the wood of this particular tree because it makes superior bows.

How about orange? Botanically, this tree is related to mulberries rather than citrus and it belongs to the family Moraceae. Although shaped roughly like an orange, the fruit is bitter, full of latex, and not edible.  However, it does give off a faint odor reminiscent of citrus, which is probably the source of the name. It is also called  a number of other common names, such as horse apple.

The trees have a rough, light-colored bark.

Up close, you can see the exposed areas show an orange color.

According to A Splintered History of Wood by Spike Carlson, Osage orange was originally found in the Red River Valley region of Oklahoma and Texas. In the late 1800’s and early 1900’s literally miles of the trees were planted as hedgerows throughout the Midwest.

The young plants have thorns on the branches. A thick planting will create a natural barrier to livestock.

Later, as barbed-wire fences replaced natural tree hedges, the trees were found to have strong, rot-resistant wood good for fence posts.

The fruit are wrinkly green balls. When I was looking for more photographs of the fruit, I found this fun video by DNLee of Urban Science Adventures showing some Osage orange trees in a park in Missouri.

Can you grow new trees from the fruit? Yes, you can. If you bury sections of fruit with intact seeds in moist soil, they will germinate. If you plant the entire fruit, you will end up with a tangled mass of seedlings. They will also grow back from the roots if you chop off the stem.

Have you ever seen Osage orange trees?

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For more about how the wood is used, see: A Splintered History of Wood: Belt-Sander Races, Blind Woodworkers, and Baseball Bats

(Affiliate Link goes to Amazon)

Seed of the Week: Apple

The mystery seeds from last week were apple seeds, Malus domestica.

How many times do we eat an apple without even glancing at the seeds?

Yet there is the potential to grow a new tree nestled inside (see below).

Well, if you don’t cut them in half with a knife, like I did 🙂

Wild apples are thought to have originated in Asia. Over the years, different varieties have been selected for commercial production. Most of the apple trees grown commercially are started from cuttings grafted on root stock.

That way the apples produced on the plant are the same as the parent stock.

Because of their unusual genetics, it can be difficult to grow apples from seeds obtained from commercial varieties. Any seedlings that do grow will produce apples that a very different from their parents.

If you would like to try growing apples from seeds, there’s more information on the Growing With Science website.

You might also be interested in finding out whether apples float.

Apples are such wonderful symbols of fall. Do apples grow where you live?

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