Studies in Fitchia — CARLQUIST and GRANT 
283 
FIGS. 1—6. Secondary xylem. Figs. 1-4, Fitchia cuneata ssp. tahaaensis. Figs. 5-6, F. cordata. Figs. 1, 2: 
Tran sections; note tyloses in vessels; Fig. 2, a sclerified tylosis in which the lumen is nearly occluded. Figs. 3, 4: 
Tangential sections; Fig. 3 is a portion showing long, thick-walled fibers; Fig. 4 shows storied apotracheal 
parenchyma cells. Fig. 5: Transection; note band of apotracheal parenchyma above center of photograph. Fig. 
6: Tangential section. Fig. 2, X 300; others, X 117. 
year twigs pale brown, 4-5 mm in diameter; 
internodes 4-12 mm long, on vegetative shoots 
to 20 mm long. Leaves simple. Petioles 25-65 
mm long, the average being 47 mm ( N = 42 ) ; 
the stipular sheaths 0.4-0.6 mm high. Blades 
broadly ovate to suborbicular, yellowish-green, 
with a narrow (0.3 mm) stramineous margin, 
and with a dark callous at the apex; 40-72 mm 
long, 36-65 mm wide, the average ( N = 8 ) 
size of the largest blade on the flowering shoots 
