144 



ECONOMIC WOODS OF THE UNITED STATES 



TABLE XIV 

 Nature of Pitting in Wood Fibres of Indigenous Woods 



Genus 



Acacia 



Acer 



jBsculus 



Ailanthus (Nat.) 



Alnus 



Amelanchier 



Amyris 



Andromeda 



Anona 



Arbutus 



Arctostaphylos 



Asimina 



Avicennia 



Betula.: 



Broussonetia (Nat.).. 



Bumelia 



Bursera 



Carpinus 



Castanea 



Castanopsis 



Catalpa 



Ceanothus 



Celtis 



Cercis 



Cereocarpus 



Chilopsis 



Chionanthus 



Chrysophyllum 



Cladrastis 



Cornus 



Cotinus 



Crataegus 



Cyrilla 



Diospyros 



Eucalyptus (Int.). . . . 



Fagus 



Ficus 



Fraxinus 



Fremontodendron. . . . 



Gleditsia 



Gordonia 



Guaiacum 



Gymnocladus 



Hamamelis 



Hicoria (Carya) 



Ilex 



sim P fe ££l 



X 



X 



X 



X- 



X- 



X 



X 



X 

 X 

 X 



X 

 X 

 X 

 X 

 X 

 X 



X- 

 X 



X 



X- 



X 



X 



X 



X 

 -X 



X 



X 

 -X 



X 



X 



X 

 X 

 X 



X 



X 

 X 

 X 

 X 

 X 



X 



X 



X 

 X 

 X 



Genua 



Juglans 



Kalmia 



Leitneria 



Liquidambar . . 

 Liriodendron. . 



Magnolia 



Melia 



Mohrodendron . 



Morus 



Myrica 



Ocotea 



Olneya 



Ostrya 



Oxydendrum 



Parkinsonia 



Paulownia (Nat.). 



Persea 



Planera 



Platanus 



Populus 



Prosopis 



Prunus 



Ptelea 



Pyrus 



Quercus 



Rhamnus 



Rhizophora 



Rhododendron. . . . 



Rhus 



Robinia 



Salix 



Sambucus 



Sapindus 



Sassafras 



Sideroxylon 



Swietenia 



Symplocos 



Tilia 



Toxylon 



Ulmus 



Umbellaria 



Vaccinium 



Viburnum 



Xanthoxylum 



Arrows indicate transitions from the prevailing type. 



Sim » le &£i 



X 



X 

 X 



X 

 X 



X 

 X 

 X 

 X 



X 

 X 



X 



X 



X 



X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 



X 

 X 

 X 



X 



X 

 X 



X 

 X 

 X 



X 



X 

 -X 



X 



X 



X 



X 

 X 



X 



X 

 -X 



X 

 X 



