APPENDIX. 



KEY TO THE FRUITS. 



The complete fruit at maturity, including the peduncle, 

 is required for determination. The number after each genus 

 refers to the list number. 



1. Fruit a cone, a cone-like catkin, a compact aggregate, 

 or an ordinary catkin. 2. 



1. Fruit simple, consisting of a single carpel or set of 



united carpels, not cone-like or catkin-like, but often 

 clustered. 22. 



2. Fruit dry at maturity, -j. 



2. Fruit fleshy. IG. 



3. Fruit a globular aggregate of flowers on a long slender 



peduncle. 4. 

 '■\. Fruit not globular, except in some true cones, but ovoid 

 or cylindrical, peduncle short, or if rather long then 

 thick and rigid. 5. 



4. Fruit an aggregate of dehiscent spiny-pointed cap- 



sules with several seeds. Liquidambar. (46). 

 1. Fruit an aggregate of 1-seeded nutlets, not spiny- 

 pointed. Platanus. (47). 



4. Fruit an aggregate of dry obpyramidal pods showing 



a prominent calyx at the tip ; receptacle with 

 bristles. Cephalanthus. (82). 



5. Fruit a true cone with naked seeds, or an aggregate of 



closed carpels showing stamen, petal and sepal scars 

 on the peduncle. 6. 



5. Fruit a catkin or a cone-like catkin. 19. 



(>. Seeds in closed carpels, the cone-like fruit sliowing 

 stamen, petal, and sepal scars at the base on the 

 peduncle. 7, 



6. Fruit a true oone with naked seeds, not showing stamen. 



petal and sepal scars on the peduncle. 8. 



(129) 



