140 HERRE 



A plant of very wide distribution, found throughout North Amer- 

 ica, a large part of South America, Western Europe, the Canary 

 Islands, the East Indies, and New Zealand. 



2. LEPTOGIUM HILDEBRANDII (Garovagl.) Nyl. 



Lichen saturninus Smith, Trans. Linn. Soc. 1 : 84. 1 791 (non Dicks. 



1790). 

 Collema hildehrandii GarovagHa, Lich. Ital. ed. I, Dec. i. no. i. 



1837- 

 Leptogium hildehrandii Nyl. Act. Soc. Linn. Bordeaux, 21: 272. 



1856. 

 Leptogium saturninus Schaerer, Lich. Helvet. Spicil. 534. 1840. 

 Leptogium saturninus Herre, Proc. Wash. Acad. Sci. 7: 382. 1906. 

 Leptogium myochroum a. saturninum Tuck. Syn. N. Am. Lich. I: 



166. 1882. 



Thallus large, orbicular, one-leaved or polyphyllous and imbricate; 

 the long irregular sinuate lobes rounded at the tips; their margins 

 upturned, more or less convolute and elevated; sometimes with finely 

 laciniate edges, margined with isidiose granules; upper surface vary- 

 ing from smooth to granular or finely densely isidiose granulate ; lead 

 color to greenish black, with usually a more or less evident metallic 

 rufous or bronze lustre; granules, when present, brownish black; 

 beneath paler, finely wrinkled; covered with a white or brown fleece, 

 this becoming interruptedly long and shaggy. 



Sterile. 



On trunks of trees; abundant throughout. Generally distributed 

 over the temperate regions. 



3. LEPTOGIUM SATURNINUM (Dicks.) Nyl. 



Lichen saturninus Dicks. Plant. Crypt. Brit. Ease. 11: 21, pi. 6, /. 8. 



1790. 

 Leptogium saturninum Nyl. Prod. Lich. Gall, in Act. Soc. Linn, de 



Bordeaux, 21: 272. 1856. 

 Leptogium myochroum b. tomentosum Tuck. Syn. N. Am. Lich. 1: 166. 



1882. 

 Leptogium myochroum b. tomentosum Herre, Proc. Wash. Acad. Sci. 



7: 383. 1906. 



