S8 BULLETIN UNITED STATICS GEOLOGICAL SURVEY. [Tbl.vi. 



ralization and great abundance of Mesembrianthemum on the coast of 

 California is somewhat wonderful, 



IjMBELLIFERuE. — This .meat order of over 150 genera is not notably 

 large in North America. The number of genera in the Atlantic and the 

 Pacific floras is about the same, but the species of the latter are much 

 more aumerous, and the interior region is equally well supplied. The 

 largest western genera are Cymopterus and Peucedanum, the former 

 peculiar to the region. Phellopterus, a plant of the northern Pacific sea- 

 coast, is also on the coast of Japan. Angelica Gmelini is common to the 

 two, also to the mountains and the seashore of Northern New England. 

 Cryptotcenia of the Atlantic flora is identically the same in Japan. Os- 

 morrhiza consists of two Atlantic; species, two Rocky Mountain and Pa- 

 cific, and one of Japan, all closely related. Crantzia lineata, a little 

 plant of the Atlantic States seaboard, occurs on the border of Mexico 

 and in South America, and again on the seaboard of Chili and Patago- 

 nia, on the Falkland Islands, and even in New Zealand and Australia. 



Araliace^e. — Are few in North America, but interesting for distribu- 

 tion. Apparently there are none at all in the whole Kocky Mountain re- 

 gion, except one in Southern New Mexico. There are only two in the 

 Pacific flora; one of them is very close to the Atlantic Aralia racemosa 

 and is Californian ; the other, Fatsia horrida, forms an undergrowth in the 

 Coniferous woods of the coast farther north, and is also in the northern 

 part of Japan. The Atlantic flora contains Aralia tyinom, the A. race- 

 mosa already mentioned, A. hispida, A. quinqaefolia, the American Gin- 

 seng, and A. trifolia. Nearly all of these have close representatives in 

 the Northeastern Asian (and Himalayan) region and not elsewhere. 



Cornace^:. — Are of equally interesting distribution. Of the ordinary 

 Cornels, four Pacific species are thought to be distinct from the seven 

 of the Atlantic flora, although the characters are not very well made 

 out, and they meet more or less in the Rocky Mountains. Then, Cali- 

 fornia only has a species (C. sessills), of the European and Japanese G. 

 mas type. Cfloridaoi the Atlantic flora has a more showy represent- 

 ative in C. Nuttallii of the Pacific forest, and less close relatives in East- 

 ern Asia. The herbaceous C. Canadensis crosses the continent at the 

 north, and in Japan meets the allied C. Succica. Nyssa, of the Atlantic 

 flora, has congeners in the mountains of Asia, while Oarrya of the Pacific 

 flora has (hem in the Texano-Mexican region and the West Indies. 



< ' \PKiFOLiACEiE. — Of the amphigaean genera there is little to remark, 

 except the considerable development of Viburnum in the Atlantic flora 

 in species Strictly cognate if not sometimes identical with those of Japan; 

 their absence from the Rocky Mountains, except well north ward, where 

 t wo cross to the oort hwest coast ; and the occurrence on the Pacific side of 

 only one endemic species. SymphoricarpuSj a wholly American genus,. 

 has '>!!<• <>r two species common to all three floras, one or two peculiar to 



each, in the central re-ion a peculiar .Mexican type. Triosteum is con- 

 fined to the Atlantic flora and to Northeastern Asia, with the Himalaya. 



