220 



ROSACEAE 



Field note. — Of California native sliruhs occiirriuK in lar;;o part in pure formations Adenoa- 

 tonia fascicuiatuni is the most almndant and widespread bush in the hifjher foothills of cisnion- 

 tane California. It is a marked feature of the mesas and extremely steep liillsides of coastal 

 Southern California, where it is the "Grcasewood"' of the people, and it is equally characteristic 

 of mountain slopes and canons in the Coast Kanges. In the South Coast Kanges it often inhabits 

 bluffs or headlands directly facing the sea, thence extending into the driest of the innermost 



Fig. 168. Adenostoma fasciculatum H. & A. Reaction of the 

 root-crown to chaparral fires: a, bulbous enlargement of the crown in 

 a seedling about 7 years old, X 1. b, c, d, e, successive stages up to 

 about 21 years, the fire interval about 6 to 9 years, X %. Adam and 

 Eve Ridge, Howell Mt., Napa County. 1915. 



Coast Ranges and forming large colonies on abrupt hillslopes, on gravellj- flats of arid valleys or 

 on well-drained detrital valley fans. In the North Coast Ranges it is likewise found from the 

 coastal bluffs east to the inner Coast Range foothills, sometimes pressing closely upon the margins 

 of the main Redwood belt or even invading locally favorable territory in the heart of the belt. 

 It may, again, occupy steep mountain sides, the flood fans on valley levels or the tilted or hori- 



