22 KEY, BASED UPON FRUIT. 



ft?. Nodding, small (about 2 in. long), scales persisting on the axis and 



entire at tip 100. PICEA ALBA. 



ft?. Pendent, H-3 in. long, scales incisely denticulate. 



149. PICEA SITCHENSIS. 

 </ 4 . Cylindrical oblong; bracts much exserted (Pseudotsuga) ; cones 



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



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



g 5 . Ovoid or roundish, small, 9 lines or less in length, scales persistent on 



the axis at maturity 23. LARIX AMERICANA. 



(I 2 . Scales few, persistent, bractless ; cone 

 e. Oblong and erect, with scales more or less thickened, 



Loosely imbricated, 8-12, thinnish 24. THUYA OCCIDENTALS. 



Valvate, 4-6, thick, only two scales fertile. 



141. LlBOCEDRUS DECURRENS. 



e 2 . Globose or subglobose. 



in. in length 74. CHAMJECYPARIS THYOIDES. 



1 in. or somewhat less in length 166. CUPRESSUS GOVENIANA. 



1-H in - lon g 195 - CUPRESSUS MACROCARPA. 



d 3 . Scales not spreading at maturity but breaking irregularly ; cones 



globose 119. TAXODIUM DISTICHUM. 



c 2 . Scales. 



(1. Thin, 3-lobed and deciduous, subtending very small samarae (Betula). 

 e. Cones erect, 



Sessile, ovoid-oblong, 1 in. in length 17. B. LUTEA. 



With downy peduncle, ovoid, smaller 95. B. NIGRA. 



6 2 . Cones suberect, ovoid-oblong ; scales thicker and with short divergent 



lobes ; wing of nutlet not broader than the body 44. B. LENTA. 



c ? \ Cones pendent, cylindrical and about 



1 in. in length 70. B. POPULIFOLIA. 



If in. in length. 43. B. PAPYRACEA. 



<?-. Thick, woody and persistent 163. ALNUS RHOMBIFOLIA. 



c 3 . Scales closed carpels, growing from an elongated receptacle and consoli- 

 dated. 



(I. Dehiscent at maturity along the medium line of the back, and letting out 

 each 1-2 berry-like seeds suspended by extensile threads (Magnolia) , 

 cone 



Cylindrical, curved, 2-3 in. long 1. MAGNOLIA ACUMINATA. 



Oblong, 1-1 in. long 51. MAGNOLIA GLAUCA. 



Oval, 3-4 in. long 101. MAGNOLIA GRANDIFLORA. 



fP. Indehiscent at maturity and falling away as samarae. 



2. LlRIODENDRON TlTLIPIFERA. 



b*>. Spherical head, hardened and bristling with 2-beaked capsules. 



60. LlQUIDAMBAR STYRACIFLUA. 



b s . Sorosis a spike with bracts and calyx-lobes all thickened and sacculent. 



63. JVlORUS RUBRA. 



a 3 . A Naked Seed, subtended or surrounded by a fleshy disk. 

 b. Drupe-like, with fleshy covering, sessile, scaly-bracted beneath and about 



1 in. in length, oval 120. TORREYA TAXIFOLIA. 



H in. length, obovoid 145. TORREYA CALIFORNICA. 



b 3 . Bony seed, subtended by a fleshy cup 144. TAXUS BREVIFOLIA. 



