1921] 
MACDUFFIE—VESSELS 445 
EXPLANATION OF PLATES XXIX-XXXII 
PLATE XXIX 
. t.—Radial section of wood of Ephedra trifurca; X 300. 
. 2.—Radial section of wood of Gnetum sp.; 150 
. 3-—Radial section of wood of Gnetum sp.; 300. 
4.—Radial section of wood of Gnetum sp.; X 400. 
. 5.—Radial section of mature wood of Alnus japonica; X 200. 
. 6.—Radial section of mature wood of Alnus japonica; X 300. 
PLATE XXX 
. 7-—Radial section of wood of Alnus japonica near pith; X 200. 
. 8.—Radial section of wood of Alnus japonica near pith; X 300. 
9-—Radial section of vessel of Alnus japonica near pith; X 400. 
- 10.—Radial section of wood of Potentilla palustris near pith; X 300. 
11.—Radial section of wood of Potentilla mons peliensis near pith; X 300. 
. 12.—Radial section of wood of Potentilla monspeliensis; X 200. 
PLATE XXXI 
<aa: ieee aban of wood sis Poentie scp obadiobed X 200. 
- Td. 
. 15.—Radial section of ‘intheese vessel of same species; X 400. 
. 16.—Radial section of vessel of Pelargonium sp.; X 400. 
ly magnified; X 400. 
17.—Radial section of Ephedra or Gnetum-like vessel perforation in 
Pelargonium sp.; X 400. 
Fig. 
18.—Radial section showing two vessels of Pelargonium sp.; X 200. 
PLATE XXXII 
9.—Radial section of wood of Pelargonium sp., showing same two 
Fr 
vessels more highly magnified; 
X 400. 
—Radial section of another vessel of same species; X 400. 
: at Radial section of another vessel of same species; X 400. 
. 22.—Radial section of another vessel of same species; X 400. 
23.—Radial section of wood of Tropaeolum sp.; X 400. 
. 24.—Transverse section of wood of Clematis sp.; X 500. 
