808 THE JOURNAL OF BOTANY 
and hence the latter are not united Speer ie the inner 
surface of the leaf for any appreciable dista 
7. Br. 1. broadly lanceolate, bordered with 4-5 roms of cells 
almost suddenly produced into a short, narrowly 
truncate and toothed apex, when wet usually distinctly 
five-rowed; pore formation as in S. recurvum. Stem 
cortex generally clearly sasiasac ine 
pulchrum eae 
7. Br. 1. very large, broadly lanasoltie Like ‘uke, borde 
with 6-8, rarely more, rows of cells; on the ieee 
surface in the upper half with alg he pores in the 
cell-angles; on the outer surface almost exclusively with 
small pores in the BPR: cell- Hanae only. Stem-cortex 
papel differentiated . wgahte pbc Sulliv. 
in the var. Zickendrathii alone are absent; stem-cortex 
not Deals differentiated from the wood- cylinder 
xxill. S. obtusum Warnst. 
. Br. 1. on the outer surface with few por 9 
. Br. 1. on the outer surface with ede numerous pores 
as in S. subsecundum). Pores very small, in the upper 
half of the leaf strongly bordered (sometimes some of the 
pores are incompletely ringed) and arranged in rows on 
the commissures, and in part in the middle of the 
cell-wa 
. St. 1. small ieecns triangular to triangular jingulate, 
almost always non-fibrillose. Br. 1. alm n- 
dulate; on ge inner surface with aie large, non- 
i ge pores in the cell-angles; on the outer surface 
the upper half of the leaf with small pores in the 
Gi: cell-angles only, towards the base near the lateral 
margins with a single or several larger pores. Borde r 
@ 
i=) 
differentiated . Xxiv. S. recurvum Warnst. 
. still smaller than i in Ser recurvum, equi jlatoral- -oiangular 
‘to triangular-lingulate, generally non-fibrillose. Br. 1 
generally not at all undulate. Pores on the i Stat surface 
as in S. recurvum ; on the outer sacha e in the apical half 
with small bordered (in an incompletely ringed) pores 
the cell-angles or on the commissures, and in th 
basal half towards the lateral margins with large pores in 
the cell-angles only. Border and stem-cortex as in 
recurvum. The smallest forms of this species have @ 
- great resemblance in habit to S. pam digey 
. 8. parvifolium Warnst. 
9. St. te pmnell from a generally narro wa shia oval or lingu- 
to triangular. lingulate, generally fibrillose. Br. 1. 
bad 
sr 
