Category: Seed of the Week (Page 139 of 167)

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: Cotton

Do you know why not many people have seen the mystery seeds from last week?

It is because they are usually covered with white, fluffy lint. The seeds were from the cotton plant, Gossypium hirsutum.

The cotton plant grows in warm climates throughout the world.

The flower is quite beautiful. I don’t know why it isn’t grown more frequently as a landscape plant.

You can see the relationship to other similar plants, hollyhocks and hibiscus.

After the flower is pollinated, it produces a boll.

The boll opens to expose the cotton,

which if you look closely…

is chock full of seeds! Thank goodness for cotton ginning, or our clothes would be rather lumpy 🙂

People have offered many ideas about why the cotton seeds are so fuzzy. Some ideas are that the lint helps move the seeds, either by wind (seems unlikely because the seeds are heavy) or by water. Others suggest that the lint attracts birds, which carry it and the seeds away to use in their nests. It is also possible the fuzzy lint protects the seeds from insect damage, although there are some insects that can still get through.

In any case, cotton is an interesting plant!

For more information, see:

Cotton Educational Resources includes Cotton: From Field to Fabric. Check the ride sidebar to go step by step through the process of harvesting cotton to making fabric.

Does cotton grow where you live?

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