ECONOMIC WOODS OF THE UNITED STATES 



141 



TABLE XI 



Occurrence of Tyloses and Gum Deposits in Vessels of Indigenous 



Woods 



Genus 



Acacia 



Acer 



^Esculus 



Ailanthus (Nat.)- ■ • 



Alnus 



Amelanchier 



Amyris 



Anona 



Arbutus 



Arctostaphylos 



Asimina 



Avicennia 



Betula 



Broussonetia (Nat.) 



Bumelia 



Bursera 



Carpinus 



Castanea 



Castanopsis 



Catalpa 



Celtis 



Cercidium 



Cercocarpus 



Chilopsis 



Cladrastis 



Cornus 



Cotinus 



Cratagus 



Diospyros 



Eucalyptus (Int.). . 



Fagus 



Ficus 



Fraxinus 



Fremontodendron. . 



Gleditsia 



Guaiacum 



Gymnocladus 



Hamamelis 



Hicoria (Carya) . . . . 



Ilex 



Juglans 



Kalmia 



Tyloses 



few 



absent 

 fen- 

 absent 



common 

 absent 



absent 



abundant 



common 



abundant 



common 



absent 



abundant 

 absent 



abundant 

 absent 



common 



abundant 

 abun-few 

 absent 



abundant 

 absent 

 abundant 

 absent 



Gum 



common 

 occasional 



common 



occasional 

 common 



Genus 



Leitneria 



Liquidambar 



Liriodendron 



Magnolia 



Melia (Nat.) 



Mohrodendron . . . 



Morus 



Nyssa 



Olneya 



Ostrya 



Oxydendrum 



Parkinsonia 



Paulownia (Nat.). 



Persea 



Planera 



Platanus 



Populus 



Prosopis 



Prunus 



Ptelea 



Pyrus 



Quercus (white) . . 



(red).... 



(live).... 



Rhamnus 



Rhizophora 



Rhododendron. . . 



Rhus 



Robinia 



Salix 



Sambucus 



Sapindus 



Sassafras 



Swietenia 



Symplocos 



Tilia 



Toxylon 



Ulmus 



Umbellularia 



Vaccinium 



Viburnum 



Xanthoxylum.. . . 



Tyloses I Gum 



absent 

 common 



few- 

 absent 

 abundant 

 absent 

 common 

 absent 



abundant 

 common 



absent 

 few 



common 

 absent 



common 

 absent 

 abun-few 

 few-abun. 



absent 



absent 

 abundant 

 abundant 

 common 



absent 



common 



absent 



abundant 

 few-abun. 

 absent 



absent 



occasional 

 common 



common 



common 

 occasional 



