THE 



55 



nes 



12. S. petiolaris, Smith. — Resembles sericea. Prima- 

 straighter and more ascending; loops less rounded, 





sometimes very regular. Secondaries closer. Reticulation 

 smaller, more definite, the delicate terminals wanting or only 

 dimly seen in the background, curled. 



As a whole, the veining is stronger, especially the terti- 

 aries, and, as in sericea, often very irregular. While on the 

 one hand it resembles the latter, on the other, the more 

 regular veined leaves bear a strong resemblance to cordata. 

 There is crenate veining along the border. — Plate 2, fig. 12. 



Illustration from specimens furnished by M. S. Bebb. 



13. S. Candida, Willd. — Primaries numerous, close, 

 straightish but zigzag, forming a very regular series of 

 bluntish or rounded loops well away from the margin, with 

 crenated veining along the border. Intervening costals only 

 occasionally present. Secondaries mostly regular, o 



so, close, weak. 



meshes 



complete, thev are m 



or oblong, small. Terminals straight. Deep-green borders 

 to midrib as well as along the large veins. Stellate points a 

 few. The veining, excepting primaries, is even throughout. 

 Not closely related to any other. — Plate 2, fig. 13. 



The illustration is from vicinity of Lauderdale, Wis. 

 Specimens furnished by M. S. Bebb, Esq. Owing to the 

 peculiar character of the leaf, and, in consequence, the 

 extreme difficulty of rendering it, the representation is 

 very poor one. 



a 



14. S. myrtilloides, L. — Primaries in smaller leaves 

 close, straight, parallel, forming a very regular series, from 

 base to apex, of rounded firm loops; in larger leaves, 



curv 



sd-ascending, dividing, forming arches; in both, as 

 in glaucophylla , there is superimposed a second set of 

 arches, succeeded on their outside along the border by 

 crenate veining, — the best representation of this last char- 



acter in our list. 



intervals. Second- 



aries about half regular; if regular, close. Both primaries 

 and secondaries strong. Tertiaries irregular, diminishing 



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10 



