126 CRTPTOGAMIA. 



to be reason for supplanting the name then given to it by any of the 

 later ones. — The figure, tab. 1, f. 1, exhibits the finest specimen ob- 

 tained, of its natural size. The rest of the figures are from Mr. 

 Sprague's drawings : — 2, shows a portion of a branch with the simple 

 terminal branchlets, and bearing a mature apothecium, slightly magni- 

 fied; 3, a cutting lengthwise of the same apothecium, more highly mag- 

 nified, and displaying the spore-bearing layer (thalaniiurn) as it is 

 received in the exciple (Jiypotliecium) ; 4, a yet more highly magnified 

 portion of the apothecium, showing the spore-sacks (thecoe) with their 

 contents, and the paraphyses, appearing to rest immediately on the 

 small cells of the hypothecium, which itself appears .to pass into the 

 looser filamentous tissue of the next adjoining part of the medullary 

 layer; 5, exhibits a smaller fragment of the apothecium, in which the 

 spore-sacks and paraphyses, retaining their natural position, are exhi- 

 bited still larger, as well as the minute, globose-oblong, simple spores, 

 which, with slight differentiation, characterize the genus; and 6. a cross- 

 cutting of a branch of the thallus, showing (what is better shown in a 

 vertical section) the compacter tissue of the almost woody axis becom- 

 ing looser, and with more of the features of the ordinary medullary 

 layer, at the outer side, where scattered gonidial cells indicate the dis- 

 continuous gonimous layer, immediately beyond which begins the cor- 

 tical layer. 



8. ALECTORIA, Ach. 



1. Alectoria jubata, (Linn.) Ach. 



Lichen jubatvs, Linn. Sp. PI. p. 1623 ; Sin. E. Bot. t. 1880. 



Alectoria jubata, Ach. Lichenogr. p. 592 ; Syn. p. 291 ; Nyl. Prodr. p. 45. 



Evernia jubata (a excl.), Fr. Lichenogr. p. 20; Montag. Canar. 1. c. p. 94. 



Hab. Summit, of Pico Ruivo, Madeira. Orange Harbor, Fuegia 

 (var. /3. clialybeiformis, Ach.). Spipen River, Oregon (var. y. irn- 

 plexa, Fr.). 



2. Alectoria sarmentosa, Ach. 



Lichen sarmentosus, Ach. in Vet. Ac. Handl. 1797, p. 212, tab. 8, f. 2. 

 Alectoria sarmentosa, Ach. Lichenogr. p. 595; Syn. p. 293; Nyl. Prodr. p. 46. 



