KEY, BASED UPON LEAVES. 7 



3 . 4-angled rather than flat branchlet ; fruit 

 f. Subglobose cones with peltate valvate scales and 

 g. Maturing the first season, small and 

 h. Conspicuously glandular, cones about 



in. long 74. CHAMJECYPARIS THYOIDES. 



i in. long 241. CHAM^CYPARIS LAWSONIANA. 



h*. Eglandular ; cones nearly in. 



240. CHAM.ECYPARIS NOOTKATENSIS. 

 gr 2 . Maturing the second season ; leaves denticulate 

 h. Obscurely glandular; and dark green; cones 



1-H in- long 195. CUPRESSUS MACROCARPA. 



$-1 in. long 166. CUPRESSUS GOVENIANA. 



h 9 . Conspicuously glandular, glaucous green branchlets 



Stout 239. CUPRESSUS ARIZONICA. 



Slender 219. CUPRESSUS MACNABIANA. 



f 1 . Fleshy berry-like strobiles; glands of leaves 



Inconspicuous; fruit dark blue in. in diameter 



25. JUNIPERUS VIRGINIANA. 



Very conspicuous; fruit nearly in. in diameter. 



242. JUNIPERUS PACHYPHLOEA. 

 d. Terenate leaves 



Roundish at apex 166. JUNIPERUS CALIFORNICA. 



More acute at apex 168. JUNIPERUS OCCIDENT ALIS. 



d. 3 Scattered, or spirally arranged, mostly carniate. . . 142. SEQUOIA GIGANTEA. 

 c 4 . Laminate and 



d. Elliptical to ovate, about 1 in. long, coriaceous. .201. CEANOTHUS SPINOSUS. 

 d*. Ovate to oblong 

 e. Single-ribbed 

 /. 1-5 in. long, at base 



g. Rounded, truncate or slightly heart-shaped, 

 h. Pale or glaucous beneath, darker above. 

 i. 1-1 1 in. long, spi nose- dentate 156. PRUNUS ILICIFOLIA. 



1 2 . 2-3 in. long, entire 153. RHUS OVATA. 



1 3 . 3-5 in. long, entire 



Whitish beneath, flat 132 ARBUTUS MENZIESII. 



Greener beneath, curving lengthwise 180. RHUS LAURINA. 



1 4 . 2-4 in. long, undulately spinose-toothed 52. ILEX OPACA. 



/t 2 . Tomentose and concave beneath ; margin 



i. Entire and undulate 131. GARRYA ELUPTICA. 



i 2 . Both entire and spinose-toothed leaves on the same tree. 

 J. Lateral veins strongly impressed above, parallel and continuous to 

 the margins, which are serrate, or occasionally entire. 



138. QUERCUS DENSIFLORA. 



j*. Not strongly impressed, and less parallel, pubescent at first beneath 



and finally 

 Glabrous, margin undulate, spinose-toothed 



137. QUERCUS AGRIFOLIA. 



Glaucous, sinuate spinose-dentate 161. QUERCUS CHRYSOLEPIS. 



gr 9 . Obtuse to acute, stiff, coriaceous, yellow-green beneath. 



176. RHAMNUS INSULARIS. 



gr 8 . Cuneate at base, glabrous or nearly so beneath, slightly revolute, flat. 



159. UMBELLULARIA CALIFORNICA. 

 /*. 6-12 in. long, thick, entire, acute at both ends. 



101. MAGNOLIA GRANDIFLORA. 

 /. 3-6 in. long, blade 

 g. Articulated to the petiole, which is 



Conspicuously winged ; stamens usually 20. 



103. CITRUS AURANTIUM. 

 Slightly, if at all, winged ; stamens usually 35. 



104. CITRUS LIMONUM. 

 gr 5 . Not articulated to petiole which is 



Scarcely 1 in. long 158. RHODODENDRON CALIFORNICUM. 



-3 in. long , 188. NICOTIANA GLAUCA. 



