Neatorama » orchid

Flowers Fool Flat-footed Flies by Faking Fungus-infected Foliage

Miss Cellania — Wed, 20 Apr 2011 14:46:15 +0000

A rare species of lady’s slipper orchid (Cypripedium fargesii) grows black spots that look like a fungus. But it’s not a fungus; it’s a feature, as Zong-Xin Ren of the Chinese Academy of Sciences found out during four years of research.

The lady’s slippers are generally pollinated by bees but C.fargesii is different. Over many hours of observation, the only insects that Ren ever saw leaving the flowers were flat-footed flies. Ren captured four of them and when he peered at them under an electron microscope, he saw pollen grains from the orchid, and spores from a fungus called Cladosporium. This fungus infects leaves and fruits, and when it does so, it produces black mould spots. The purpose of the orchid’s black splotches was becoming clear.

Ren also analysed the orchid’s scent, an unpleasant fragrance reminiscent of rotting leaves. He found that the flower produces over 50 aromatic molecules that are found in other flowers, but three unusual ones that are common to Cladosporium moulds.

Like they always say, you catch more flies with fungus than with vinegar. Cypripedium fargesii is not the only orchid that attracts pollinating insects by deception, as you’ll see in the article at Not Exactly Rocket Science. The article also illustrates the importance of humorous headlines. Link

World’s Smallest Orchid is Only This Big: O

Minnesotastan — Tue, 08 Dec 2009 06:23:42 +0000

The blossom of the orchid is only 2.1 mm wide – approximately the size of the O in the title of this post.

American scientist Lou Jost found the tiny flower by accident among the roots of a larger plant that he had collected from the Cerro Candelaria reserve in the eastern Andes.

The petals are transparent because they are only one cell thick.

Link.

A Sexually Deceptive Orchid…

Queuebot — Wed, 28 Jan 2009 21:16:55 +0000

"...so convincing that male wasps will mate with it to the point of ejaculation."

After reading that in Harper's Magazine ("Findings" section, Sept '08), I Googled the relevant terms and found that this has been known for a century, and there's an abundance of such reports, most of them originating from Australia.

Some orchids can imitate the olfactory cues used by males to locate females, including producing pollinator-specific sex pheromones. As the pollinator approaches the orchid, he is again deceived by the coloration or shape of the blossom.

The original research was performed on Australian tongue orchids (Cryptostylis species). Curious to know what they looked like, I searched Google images and found the embedded photo above at the link below.

Remember, to a male wasp, these orchids look and smell like female wasps. What they look like to you is not relevant here.

Link - via harpers

From the Upcoming Queue, submitted by Minnesotastan.