Edna's Trillium

Edna and John Garst have a cabin on Lake Yonah, an old Georgia Power reservoir in northeastern Georgia's Tallulah-Tugaloo drainage, which forms with the Chattooga River, the headwaters of the Savannah River.  Lake Yonah sits in a small gorge, Georgia on the west, South Carolina on the east.   One day they boated over to Battle Creek Ravine in South Carolina.   Edna noticed a small white-flowered trillium that she had never seen.  

When they returned to the cabin, she checked her wildflower books, but none of the trilllium pictures looked like the trillium flower she had seen at Battle Creek.   Later, when she and John told Dr. Wilbur Duncan, a botanist at the University of Georgia in Athens (their home base) about the plant, Dr. Duncan said he vaguely remembered finding something like the Battle Creek trillium in nearby Tallulah Gorge years earlier.

A few years later, a description of Trillium persistens (persistent or Edna's trillium) appeared in Rhodora, the Journal of the New England Botany Club, in English and, as required by botanical science, in Latin.   The little white trillium Edna found that day was a new species!

Trillium persistens is a small white trillium endemic to Georgia and South Carolina.   Its entire range is included in the southern portion of the Tallulah-Tugaloo drainage in Tallulah Gorge and tributaries and small gorges to the south.   Edna's trillium is what biogeographers call a "narrow" endemic.

Was it more widespread in the distant past?   Or is this trillium a relatively new plant that has speciated in the ravines and gorges of northeastern Georgia and northwestern South Carolina?   It is difficult to know; possibly, future studies on the DNA of it and related species will shed more light on its origin.

But thanks to the sharp eyes of Edna and John, we now know that this small woodland beauty is rare (it is listed as endangered by the U. S. Fish and Wildlife Service--it even appeared on a postage stamp a few years ago) and local.   And every time we find the plant in Tallulah Gorge or a nearby ravine, we know we are looking at something unique.

An Inordinate Fondness for Beetles

Among the most famous anecdotes in biology relates that the Archbishop of Canterbury (or some scholarly cleric) asked the witty English biologist J. B. S. Haldane "What can we learn about the Creator from looking at the Creation [Nature]?   To which Haldane succinctly replied:  "An inordinate fondness for beetles."   Not knowing that, at over 300,000, there are more species of beetles than any other earthly macro-taxonomic group, the Archbishop probably missed the wit and humor of Haldane's quip.

A spectacular array of living other living things inhabits this planet.   Estimates for the total number of species on Earth range from 1.5 million to 30 million.  In 2005, I published a book called "Biodiversity:  Przewalski's Horse, Edna's Trillium, The Giant Squid, and Over 1.5 Million Other Species."   In it, I attempted my on take of organizing and explaining the biodiversity found on this planet.

This is the first installation of a blog on the subject of biodiversity.   I hope to periodically update this site with sketches on species, ecology, and natural processes. 

Next up:  Edna's Trillium (Trillium persistens).