264 MISS H. BANDULSKA ON THE CUTICULAR STRUCTURE OF 
Taxodium europeum. T. distichum. | Glyptostrobus heterophyllus. 
Cuticular Structure :— | 
| 
| 
| 
Stomata. | | 
Arranged in bands occurring | Two bands on the lower sur- | Banded arrangement of sto- 
on both surfaces. | face. Not organised into| mata, which occur on both 
Each band consists of 4-5| definite bands on the upper| surfaces, 
rows of stomata, surface. | 
Stomata sunk beneath epi- Stomata sunk beneath epi-|Stomata sunk beneath epi- 
dermal pores. dermal pores. dermal pores. 
Poral Axes, 
Orientation mainly vertical, | Orientation of stomatal axes Orientation very variable, but 
but oblique and transverse) mainly transverse, but many orientated vertically. 
orientation also occurs. oblique and vertical orien- | 
tation quite common. 
| é 
Length ‘0104 mm. ‘02 mm, ‘043 mm. 
Width ‘0061 mm. ‘008 mm. | ‘013 mm. 
Stomatal Pores. 
Pores commonly surrounded | Pores commonly surrounded | Pores commonly surrounded 
by 4 epidermal cells. Five by 4 epidermal cells, but 5 by 4, 5, or 6 deeply staining 
epidermal cells less com-| may occur forming then a epidermal cells. Five cells 
monly surround the pore. rosette. Two out of the {are forming a rosette round the 
most clearly differentiated. | pore occur most commonly. 
When 4 epidermal cells sur- | When 4 epidermal cells sur- When 4 cells surround the 
round the pore, two are| round the pore, two are, pore, they are not grouped as 
orientated transversely and | orientated transversely and | dàn. T. distichum, but two may 
two longitudinally. two longitudinally. | occur on each side. 
| Epidermal Cells of the Poral 
| Ring. 
The epidermal cells of the 
| poral ring vary much in size, 
| and one may be much larger 
than the others and be pro- 
duced at one end like a horn. 
Av. length of the longest cell 
| of the ring ...... ‘036 mm. 
‚Av. width of the longest cell 
| ofthe ring ...... ‘014 mm. 
| Av. length of the smallest cell 
| ofthe ring ...... '028 mm. 
Av. width of the smallest cell 
Epidermal Cells. | ofthering ...... ‘014 mm. 
Elongated parallel to long | Orientation mainly vertical, | Orientation main]y vertical. 
axis of leaf. some amount of obliquity 
Seen. 
Length -039 mm. Length ‘08 mm. | Length '] mm. 
Width ‘017 mm. Width ‘026 mm. | Width ‘023 mm. 
It is evident from a comparison of the two leaf-cuticles that Taxodium 
europæum is a true Tazodium, and not a polymorphic form of Sequoia. Its 
likeness to Tawodium distichum appears to be very close, but the differences 
