PLATE LXXII. 



PAGE 



Figs. 1, 16, 17. Hicoria pseudo-glabra Hollick 221 



Fig. 2. Prunus ? merriami Knowlton 233 



Figs. 3-5. Quercus glennii Hollick 226 



Figs. 6-10. Pterocarya denticulata (Web.) Heer 222 



Figs. 11-14. Sapindus marylandtcus Hollick 234 



Fig. 15. JtjGlans acuminata Al. Br 220 



