Our African trip was focused on animals not plants, but TPP was at least familiar with one rather common tree that was in flower & fruit this time of year, the beginning of the dry season. It's called the sausage tree because of the big, heavy indehiscent fruits hanging down like so many salami in a deli (bottom image). Like other Bignons, Kigelia africana, has winged seeds but since the fruit doesn't open they don't get much of a chance to fly until after a large mammal gnaws it open. The dark maroon-colored flowers only open for a single night and they are bat pollinated; sometimes you can see the marks left by bat thumb hooks on the outer throat of the flower. Since the flower is rather large and fleshy that much biomass attracts considerable interest and various antelope, and even elephants will stop by trees for a snack of recently dropped corollas.
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A plant pundit comments on plants, the foibles and fun of academic life, and other things of interest.
Showing posts with label Bignon. Show all posts
Showing posts with label Bignon. Show all posts
Beautiful but invasive pest - African Tulip Tree
If any of you are foolish enough to think that TPP is leaving the tropics and returning to the polar vortex now visiting the upper Midwest with truly arctic temperatures then you're crazy. TPP is certain that temperatures like that will freeze some of his plant collection. But more on this later this spring. Here in Maui, it is "spring" of a sorts and one of the ornamental trees that is in flower is the African Tulip Tree (Spathodea campanulata) a member of the Bignon family. It has a big flowers that are bright orange. It is a totally gaudy tree. Supposedly perching birds visit these flower to get an interesting reward, a drink of water. The flower buds are filled with water, and it you nip off the end of the calyx of an intact bud, and squeeze the base it will squirt out a stream. Kids always know this trick. The image shows that the flower is basically a cup. A tree in flower has lots of flowers and flowers over a longish time. Unfortunately in wetter areas, this tree is invasive along streams. And it has become a member of what TPP calls UTF (ubiquitous tropical flora). It's certainly pretty, but what a pain.
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