Adkins on. — Some Features of the Anatomy of the Vitaceae. 139 
3. Vestiges of the linear ray persist in other members of the Vitoideae, 
in the seedling, and in the leaf segments of the first annual ring. It re- 
appears likewise after an injury. 
4. From the more complete loss of the linear ray and the reduction of 
the xylem cylinder to separate woody bundles, Ampelopsis and Cissus 
appear to be less primitive than Vitis. 
5. The vine, derived from woody ancestors, shows an approach to the 
herbaceous type of stem. 
In conclusion, I wish to express to Dr. E. C. Jeffrey my sincere appre- 
ciation of the use of materials, and of advice and aid given in the course of 
this investigation. Thanks are due also to Mr. Arthur J. Eames for the use 
of seedling material. I am likewise indebted to the Director of the 
Harvard Botanical Garden for material of Leea> and to the Director of the 
Arnold Arboretum of Harvard University for numerous species of Vitaceous 
plants. 
EXPLANATION OF PLATE XV. 
Accompanying Miss Adkinson’s article on Some Features of the Anatomy of the Vitaceae. 
Fig. 1. Wood of Leea sp. in transverse section, showing both linear and large rays, x 40. 
Fig. 2. The same, x 100. 
Fig. 3. Wood of Vitis californica. x 40. 
Fig. 4. The same, x 100. 
Fig. 5. Seedling stem of V. cordifolia. x 10. 
Fig. 6. Segment of the woody cylinder of the same, x 100. 
Fig. 7. Foliar segment of the woody cylinder of the same, x 100. 
Fig. 8. Section showing both foliar and non-foliar segments of the stem of Vitis sp. x 10. 
Fig. 9. Part of the same, x 40. 
Fig. 10. Foliar segment of the stem of V. Coignitiae. x 30. 
Fig. 11. Wood of Ampelopsis Veitchii. x 40. 
Fig. 12. Foliar segment of the stem of the same, x 40. 
