96 Forestry Quarterly. 



The region of the South Coast Ranges also contains much 

 barren land, and as a whole is characterized by scattering groves 

 of Live Oak and Blue Oak. In contrast with the inner ranges 

 which show but four species, the seaward slopes show 13 species, 

 of conifers. Those of widest range are Yellow Pine, Digger 

 Pine, Douglas Fir and Redwood. This region has also six local 

 littoral conifers — in all 49 species of trees. 



The North Coast Ranges district has as its most marked 

 feature the Redwood belt on the seaward slopes of the western 

 range, where the climate is marked by the low daily and seasonal 

 range of temperature and high rainfall. On the summit and east 

 side of this range only 50 per cent, is wooded — mostly with Doug- 

 las Fir, Tan Oak, Madrona and Oregon Oak. The inner Coast 

 Range above 4,000 feet supports a forest belt of Yellow Pine, 

 Sugar Pine, Incense Cedar, White Fir, Red Fir, and southward. 

 Digger Pine. This province is the richest of the five, containing 

 59 species. 



The Sierra Nevada is the most extensive and most important 

 forest region of the state. The western slope is especially heavily 

 forested and the altitudinal zones are strikingly marked. The 

 foot-hills are largely barren showing only scattering clumps of 

 Digger Pine and Blue Oak. This is usually succeeded by a belt 

 of chapparal, following which is the Yellow Pine belt up to 5,000 

 feet; associated with the Yellow Pine are Incense Cedar, White 

 Fir, Sugar Pine and Big Tree. Following this is the Red Fir 

 belt with Red Fir, Silver Pine and Lodgepole Pine. Above 7,000 

 feet occur White-bark Pine, Mountain Hemlock and Juniper. 

 This region possesses 52 species. 



The fifth region. Southern California, with 57 species, presents 

 largely desert conditions. Only in the valleys and unprotected 

 slopes above 4,000 feet are there forests, and these of the open 

 stand type. The species are chiefly Yellow Pine, White Fir, 

 Incense Cedar, Jeffrey Pine, Coulter Pine and Desert Fir, with 

 Black and Maul Oaks on the lower edge of the conifer belt. 



In the 30 pages devoted to the subject of distribution as out- 

 lined above, the author goes fully into the physical, biological and 

 accidental factors involved. 



An equal amount of space is devoted to a discussion of such 

 biological characteristics as stump-sprouting, leaf variation, seed 

 production, tree form, nanism, hybridization, and teratology. 



