No. 333.] 341 



stems is arranged in a confused manner, the youngest in th« 

 centre, their colyledons single. 



4. Eiidogens. — Leaves parallel veined. The root is, internally, 

 much like the stem — growth from within. 



5. Dictyogens. — Leaves not veined, deciduous, (fall ofi" every 

 year.) Root and wood in solid concentration — circles — a small 

 class. The Yam, Sarsaparilla, and a few more. Aiktoon, a net. 

 Wood youngest at the circumference — Cotyledona two or more. 



6. Gymnogens. — From the seeds being quite naked. 



7. Exogens — Growth on the outside. The seeds are inclosed 

 in seed vessels. 



The seven classes embrace the who^ vegetable kingdom. 



The first class— the Thallogen — grows as a Fungus, or an Alga, 

 or a Lichen, according to the peculiar conditions of heat, light or 

 moisture, in which it is placed — producing .Fungi or putrid or- 

 ganic beings. Lichens on living vegetables, earth or on stones, and 

 Algae, when developed in water. 



H. MEIGS, August, 1852. 



[From Lindley.] 



Endogenous Plants. — A primary class of plants. Their stems 

 grow by successive additions to the inside. And they are also 

 distinguished by the veins of their leaves running parallel — no 

 dividiiig or branching — grasses, lillies, asparagus, &c., and in lat- 

 itudes large trees, such as Palms and Screw-pines., 



Exogenous Plants, — Those plants which grow by addition from 

 without. They are dicotyledons. A transverse section shows 

 the medullary rays from the centre to the bark — fibrous rings, 

 with a woody mass between them. They constitute another pri- 

 mary class into which tlie vegetable world is divided, and are 

 characterized by the reticulation (net work) of their leaves. 



General Chandler exhibited to the members specimens of the 

 Osier Willow, salix vinunalis, grown by him from the stock of 

 Mr. Bement, of Albany. He observed that this important osier, 

 the only one which experience has decided to be the very best for 



