KEY, BASED UPON FLOWERS. 7 



13-18 in. long 146. P. LAMBERTIANA. 



d 4 . Leaves in both 2s and 8s, 7-12 in. long ; cone 3-6 in. long, glossy, brown. 



135. P. CUBENSIS. 



c 2 . Leaves evergreen, scattered (not fascicled) ; cones with thin scales, matur- 

 ing the first year. 



d. Cones erect ; cylindrical ; leaves mostly flat, linear (Abies.) 

 e. Cones 3-4 or 5 in. long ; leaves 



Scarcely 1 in. long 22. A. BALSANEA. 



2 in. or more in length 173. A. CONCOLOR. 



e 2 . Cones 6 or 8 in. long ; leaves quadrangular 174. A. MAGNIFICA. 



d*. Cones pendent. 

 e. Bracts inconspicuous, leaves 

 /. Petiolate and generally flat and linear (Tsuga)-, cones 



Small, f in. or less in length, Ieaves2-ranked. .21. T. CANADENSIS. 



Larger, 2-3 long ; leaves scattered 171. T. PATTOINANA. 



/. Sessille; Ieaves4-angled (Picea) 



1-1^ in. long, ovate, scales eroded at tip, branchlets pubesent. 



20. PICEA NIGRA. 

 2 in. long, cylindrical-ovoid, entire at tip, branchlets smooth 



100. PICEA ALBA. 

 l-J-3 in. long, cylindrical, scales elongated and incisely denticulate 



at tip 149 . PICEA SITCHENSIS. 



C 2 . Bracts conspicuously exserted (Pseudotsugd) ; cone 



2-3 in. long 150. P. TAXIFOLIA. 



5-8 in. long 172. P. MACROCARPA. 



c 3 . Leaves deciduous, soft, needle-shaped and in fascicles of many each ; 

 cones about 8 lines in length, scales thin (Larix) and with inflected 



margins 23. L.AMERICANA. 



b\ Few. 



c. Imbricated, without bracts and each bearing two erect ovules ; flowers 

 d. Monoecious, scales thinnish and 8-12 (Thuya). ... .24. T. OCCIDENTALS. 

 d 2 . Dioecious, scales fleshy and consolidated, making a dark blue berry -like 



fruit (Juniperus) which is 



Lai ge (about in.), reddish-brown with sweet fibrous flesh ; seeds 1 or 2. 



167. J. CALIFORNICA. 

 Smaller, bluish, with resinous flesh, leaves 



Ternate, ciliate-denticulate, seeds 2-3 168. J. OCCIDENTALS. 



Binate, entire, seed 1-4 25. J. VIRGINIANUS. 



c*. Valvate, thick, and only one pair fertile 141. LIBOCEDRUS DECURRENS. 



c 3 . Peltate, with edges joined, cones 



d, Subglobose ; flowers monoecious ; cones dehiscent 

 e. Along the edges of the persistent scales 



Small, i in. in diameter, maturing 1st year (Chamcecyparis) 



74. C. THYOIDES. 

 Larger, 1 in. or less, maturing 2d year (Cupressus.) 



66. C. GOVENIVNA. 

 e 2 . Scales breaking apart irregularly and 15-20 in number. 



119. TAXODIUM DISTICHUM. 



d 2 . Ovoid-oblong, scales diverging at right angles to axis and rhomboidal 

 at apex ; cones 



2-3 in. long 142. SEQUOIA GIGANTEA. 



1 in. or less 143. SEQUOIA SEMPERVIRENS. 



b 3 . Differentiated into a fleshy covering or cup, with single erect seed. 

 C.With fleshy covering (drupe-like), sessile and 



1 in. or slightly more long 120. TORREYA TAXIFOLIA. 



About \\ in. long 145. TORREYA CALIFORNICA. 



c 2 . Subtended by a red fleshy cup 144. TAXUS BREVIFOLIA. 



ENDOGENOUS PLANTS those having stems in which the wood forms in wire- 

 like bundles, generally a single cotyledon and leaves 

 parallel veined: ovary superior and compound: peri- 

 anth corolla like ; flowers perfect (Liliacece). 



175. YUCCA ARBORESCENS. 



