So.i.] okay ami BOOKEB OH mi. ROCKY MOUNTAIN FLORA. 43 



latter country, and of another in Tibet From our western floras it is 

 totally absent 



1*1.1 MBAGINACE^E. — In this country very tew. and confined to the 



coasts : are not uoteworthy. 



Peimulacejs. — Need little mention, most of the genera being amphi- 

 gseao ami widely distributed over the country, although few in species, 

 many of them alpine or alpestrine. The most peculiar genus, Dode- 

 oatheon, spans the continent in very various Tonus, which seem to be 

 connected into one species. The true species of Lysimachia are only on 

 the Atlantic side, and so mainly is the peculiar genius Steironenia, 

 although the commonest species extends northward to the Pacific. 



Sapoi •.< ' . — This is one of several orders which, although mainly 

 tropical, have temperate representatives in the Atlantic United St 

 where there are at least three species oiBumelia. 



i'.r,r.\ vit..k. — Are in similar case. Diospyros Virginiana, our Persim- 

 mon, extends north to latitude 11 : . and barely crosses the Mississippi. 

 A Texan species lies beyond our line. Westward the order is wanting. 



Si 5 i;.\< A( t..i.. — Are found on both sides of the continent, but not at 

 all in the intermediate regions. The order is one of those that affect 

 the eastern side of continents. Accordingly, the Atlantic flora has 

 three genera (Symplocos, Halesia, Styrax) and eight species; the Pacific 

 flora only a single 8tyi 



Oli:aci:.i;. — Are fairly well represented in the Atlantic flora b\ six 

 ven species of Frcuuinus, a few of Forest it re. a Chionanthus, and an 

 Osmanthus; two species of Fraxinus are the sole representatives in the 

 Pacific flora. The wide intervening region has none except a Fraxinus, 

 with simple leaves, on the southern border, where also flourish one oi 

 two species of Forestiera and of the Texano-Mexican genus Menodora. 



Ar« >cynaceje. — Tie- two species of Apocynum make a part of all three 



floras: the Pacific has a peculiar genus, Cycladenia; the Atlantic. a plant 



red to the Northeastern Asian genus TrcLchelospermum^ and Amsonia 



(which is also Japanese), the latter reaching the southern borders <>f 



the ( rreat Basin. 



A» : . iai>a< k.l — Most of is is North American, and the spo- 



ts to Dumber, are not very unequally divided between the three flo 

 at least if New M ad Arizona betaken into the account. This 



southern frontier and the country beyond is rather rich in tin- order. The 

 Pacific flora has thre< i nearly related to Asclepias; one of them 



is made the type of a peculiar genus, Schizonotus, the other two art 



■d to the chiefly African gen is Qomphocarpus. The Atlanta- flora 

 divid that oi the plains up to the Rocky Mountains the genera 



/.with tropical pan- of America the genus 

 . and i- ind it monopolizes the genera 



Podo stigma and .1 nai 



I.im .i. ,— As our species of Buddleia and the genus 1 



I- . 



