Harper: Explorations in Georgia 1903 161 



or five feet deep issuing from a "blue spring" in the Flint River 

 swamp in Dougherty County a few miles below Albany. The 

 plants were often a yard long or more, and presented a beautiful 

 appearance waving to and fro about the white sandy bottom. 



Blue springs are common along some of the streams of the 

 lime-sink region, particularly the Flint River, which flows through 

 this region loo miles or more. They are the outlets of bold sub- 

 terranean streams, and their bluish color is due to the dissolved 

 limestone. This particular spring, known in the vicinity as the 

 Blue Spring, has been visited by several botanists and at least one 

 geologist, and I am informed by the latter that its flow is about 

 70,000,000 gallons a day. 



PODOSTEMON CERATQPHYLLUS Michx. 



Collected on August 26 on submerged limestone rocks in very 

 swift water at the shoals of Muckafoonee * Creek near its con- 

 fluence with the Flint River a mile or two above Albany [rto. /p5o). 

 Not previously reported from the coastal plain, f 



The proposed conversion of these remarkable shoals into a 

 source of water-power threatens the destruction of the Podostemon. 



TiARELLA CORDIFOLIA L. 



Observed in rich damp shady woods in Clay County near 

 Fort Gaines on July 23. Rare. This seems to be its southern 



limit, as far as known. Dr. Mohr J has reported it from Suggs- 

 ville, Alabama, which is in the same latitude (3 1 '^S 5^), and Wood 

 mentions its occurrence near Eufaula, Alabama, which is about 

 twenty miles farther north. 



Crataegus georgiana Sarg. Bot. Gaz. 33: 113. 1902; 



//. 640. 1902. 



The only Crataegus I col 

 this species, according to M 



It was 



* A modern name, coined a few years ago by citizens of Albany for this creek 

 (which is only a mile or two in length) from the names of its two affluents, Muckalee 



and Kinchafoonee. 



f An early and little-known record of a Georgia station for this species (in the Paleo- 

 zoic region) occurs in a paper by Julien Deby, entided ''Relation succinte d'une ex- 

 cursion faite aux bords de 1 Oostanaula en Georgie, fitats-Unis" (Bull. Soc. Malacol, 



Belg. 12: (3)-(7)- 1877). 



JContr. U. S. Nat. Herb. 6: 534- I90i- 

 Class-Book 370. 1861- 



