'JCi 1 I'LANT LIFK <>K AI.AHAMA. 



the vicinity »»l' Aubiirn, wliicli were kindly placed at the servlee of (lie 

 writer by tlie eolleetdis, I'lols. V. S. I-'arle and Carl Baker. 



tJENERAL DISI KHtlTlOiN. 



Of the I!) genera known at present to be represented in Alabama, the 

 JoUowiii^ are of an exclusivtdy sontliern ranj,'e: 



Strijjnla. ' (ilypliis. (lyr<»Hti>iiiiiiii. 



ryrenastrnm. Chiodecton. Tin-lot ri-ina. 



Lecuiiactis. Heterotbeciiiin. 



Trypetlieliuiii. Coenogonimn. 



These are most nnnierously represented by species iiduibitin}; the 

 Louisianian life area, whicli frecpiently extend to the neighboring; tro])- 

 ics and are rarely found north of the Carolinian life area. Kepresented 

 by a number of species in the southern part of Eastern North America 

 and also in the tropics are : 



(irapliis. Leptogiuni. Pyxine. 



PyrenopsLs. Collema. 



Ompbalaria. Sticta. 



These are also tmiuently met with in the Alleglienian area. 

 Of decidedly northern distribution arc such as — 



Verruearia. Khizocari)()n. Placodium. 



The representatives of these genera in the Southern States are mostly 

 confined to the mountain region. Elsewhere they are Avidely scattered 

 from the cooler tem])erate to the frigid zones and the cooler regions of 

 the Old World. 



The following are more or less eciually distributed throughout the 

 cooler and warmer zones, and many of them liave numerous represent- 

 atives in corresponding regions of the Old World: 



Pyrcimla. Riuodiua. Cctraria. 



Artliouia. Leptoginm. Physnia. 



Opegrapha. Collema. Pliyscia. 



Buellia. Lecanora. Panndia. 



Biatora. Placodium. Evcriiia. 



Baeomyces. Heppia. Raiualiua. 



Gyalecta. Pauuaria. Usnea. 



Pertusaria. Peltigera. 



Up to the present IDS species and UG varieties of lichens have been 

 recognized in Alabama. 



REGIONAL DISTRIBUTION. 



Although generally of a wide distribution, the greater number of 

 species and varietal forms of these lowly plants are more or less strictly 

 confined to the several life areas with their tioral regions, which share 

 the State. i>I early one-half (48.6 per cent) are confined witliin the limit 



' Strigula occurs in Polynesia. 



