368 
L, H. MACDANIELS 
Table i 
Sieve Tube 
Type 
V csscl i ypG 
Wood Paren- 
cliyiTia Distri- 
bution 
Salicaceae 
I 
3 
I* 
Salix nigra 
I 
3 
3 
Juglandaceae 
Juglans cinerea 
I 
3 
2 
Carya cordiformis 
I 
3 
2 
Betulaceae 
Ostrya virginiana 
I 
3 
2 
Betula lutea 
I 
2 
Alnus incana 
I 
I 
2 
Fagaceae 
Fagus grandifolia 
3 
2 
Castanea dentata 
2 
3 
2 
Quercus alba 
2 
3 
2 
Urticaceae 
Ulmus americana 
3 
3 
3 
Celtis occidentalis 
3 
3 
3 
Madura pomifera 
3 
3 
3 
3 
3 
3 
Magnoliaceae 
Magnolia acuminata 
2 
2 
I* 
Liriodendron Tulipifera 
2 
I 
I* 
Lauraceae 
Sassafras variifolium 
3 
2 
3 
3 
3 
3 
Platanaceae 
Platanus occidentalis 
2 
2 
2 
Rosaceae 
I 
3 
2 
Prunus serotina 
2 
3 
2 
Prunus Persica 
3 
3 
2 
Leguminosae 
Gleditsia triacanthos 
2 
3 
3 
Robinia Pseudo-Acacia 
3 
3 
3 
Simarubaceae 
Ailanthus glandulosa 
3 
3 
3 
Anacardiaceae 
Rhus typhina 
2-3 
3 
3 
Aceraceae 
Acer saccharum 
2-3 
3 
3 
Acer Negundo 
2-3 
3 
3 
Aesculus Hippocastanum 
2 
3 
3 
Tiliaceae 
Tilia americana 
2 
3 
2 
Eleagnaceae 
Eleagnus augustifolia 
3 
3 
2 
Cornaceae 
Cornus paniculata 
2-3 
I 
2 
Nyssa sylvatica 
I 
2 
* In the starred species the position of the parenchyma is thought to be 
reduced condition rather than a truly primitive one (9). 
