16 KEY, BASED UPON FRUIT. 



d z . Scales several, breaking apart at maturity; cones subglobose. 



119. TAXODIUM DISTICHUM. 

 c 2 . Scales. 



d. Thin, 3-lobed and deciduous, subtending very small samarse (Betula). 

 e. Cones erect, 



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



With downy peduncle, ovoid, smaller 95 B. NIGKA' 



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



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



e z . Cones pendent, cylindrical and about 



1 in. in length 70 . B . POFULIFOLIA. 



If in. in length 43 B . PAPYRACEA. 



a 2 , ihick, woody and persistent, ovoid-oblong 



i-^in. long; leaves pale-puberulous beneath.. 163. ALNUS RHOMBIFOLIA. 

 ^-1 in. long; leaves rusty pubescent beneath. 217. . . ALNUS OREGONA. 

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

 dated. 



d. 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, l-l in. long 51. MAGNOLIA GLAUCA. 



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



c? 2 . Indehiscent at maturity and falling away as samarae. 



2. LlRIODENDRON TULIPIFERA. 



V. Spherical head, hardened and bristling with 2-beaked capsules. 



60. LlQUIDAMBAR STYRACIFLUA. 



b 3 . Sorosis a spike with bracts and calyx-lobes all thickened and sacculent. 



63. MORUS RUBRA. 



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

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



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



1| in. length, obovoid 145. TORREYA CALIFORNICA. 



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



