182 LIBOCEDRUS, OR 



and of a pale olive-brown colour. Scales fleshy, upper pair 

 pressed together at the margins, and containing two seeds 

 under each ; the lower ones overlapping, much shorter and 

 smaller, but varying very much in size, abortive, and with a 

 double margin, having the appearance as if a thin scale had 

 grown to the back of the others, the outer one having a raised 

 edge all round, terminating in a thin, blunt, reflexed point. 

 Seeds soft, somewhat angular, rounded on one side, and with 

 the elliptic wing, measures three-quarters of an inch in length, 

 and cover the inner face of the scale. Seed-leaves in twos. 



A noble evergreen tree, with an umbrella-shaped top, and 

 straight stem when old, growing from 40 to 140 feet high, and 

 from three to five feet in diameter. 



It is found plentiful on the north-west coast of America, 

 alone: the banks of the Columbia River, and on the mountains 

 in northern California. Hartweg found it on the hills sur- 

 rounding Bear Creek, in California, a tree 130 feet high, with 

 a trunk from 13 to 16 feet in circumference; and Jeffrey along 

 the banks of the Scots River, growing in sandy soil, a tree 140 

 feet high, and five feet in diameter. It is also found on the 

 Sierra Nevada, or Snowy Mountains, and along the Sacra- 

 mento River. 



It is the "White Cedar of the Californians, and is frequently 

 misnamed Thuja gigantea, as pointed out by Professor Parla- 

 tore. 



No. 3. Libocedrus Doniana, Encllicher, Don's New Zealand 



Arbor- Vitse. 

 Syn. Thuja Doniana, Hooker. 

 Dacrydium plumosum, Bon. 



Leaves in four rows ; marginal ones more or less extended 

 at the points, acute, and clasping on both sides ; while those 

 on the upper and under surfaces are pressed flat, very much 

 smaller, nearly round, and acute pointed, with the outer surface 

 of the leaves clothing the under part of the branchlets of a 

 much lighter colour, and thickly covered with a glaucous 



