58 MISSOURI BOTANICAL GARDEN 



In very young leaves extremely delicate terminals, finely 

 branching and curling, may be observed. 



As a whole, the venation is weak, very irregular, but 

 even and smooth, — Plate 3, %. 18. 



Illustration from herbarium specimen. Fresh leaves, 



Mr 



S 



horizontal, 



Primaries strong, nearly 

 , forming arches rather 

 irregularly. Costals one or several between two contiguous 

 primaries . Secondaries rather distant, weak, mostly irreg- 

 ular. Tertiaries delicate, dividing a space into irregular, 

 angular or blocky meshes embracing the very delicate, 



abundant vanishing termi 



g™g 



even and smooth. For so broad a leaf the pri 



uncommonly zigzag. Compared with glaucophylla , which 

 it resembles, the veining is weak, with meshes smaller and 

 more permanent. The straightness and angularity of the 

 former is softened in this by the introduction of gentle 

 curves and flowing terminals, giving on the whole a quite 

 different picture. — Plate 3, fig. 19. 



Illustration from specimens from the Arnold Arbor- 



from the White Mts 



Faxon, Esq. 



20. S. purpurea, L. — Primaries distant, straight-as- 



cending, somewhat irregular, c 



looping not well defined; along margin 



5 " L "loaning 



^ ***««*£*»* "*^& 



veining. Secondaries very irregular. Tertiaries defined 

 only in very young leaves, embracing extremely delicate 



faint terminals, — therefore, in mature leaves, meshes appe 

 large, and veining scant. 



On the whole, the venation is weak, even, smooth, flowi) 

 or curvy, exhibiting brilliant lines of light, winding amidst 

 the dense green. Peculiar. Impression exceedingly dis- 

 tinct. — Plate 3, fig. 20. 



e> 



s 



om vicinity (cult.). 

 Primaries regular, straight 



13 



