Chapter 5.pdf - DSpace@UM

Table 10, continued.Species OSLR (E) OSLR (C)AsiaRothmannia attopevensis raised IRothmannia eucodon raised IRothmannia kampucheana raised WRothmannia pulcherrima raised WRothmannia sootepensis raised WRothmannia venalis raised WRothmannia vidalii ? ?Rothmannia vietnamensis raised WRothmannia wittii raised IABERRANT AND RELATED TAXARothmannia macrophylla ? IRothmannia globosa same level WKochummenia parviflora ? ?Kochummenia stenopetala same level WNotes: ?= unavailable data; I = intermediate; W=wide; italicized data indicating measurements from basal portion of the leaflamina; data with asterisk (*) indicating measurements from apical portion of the leaf lamina.5.4.6 Stomatal DensityWilkinson (1979) remarked that the mid-lamina region of the lower surface isconsidered the least variable in terms of stomatal density. In spite of this, the lowerleaf surface stomatal density in the investigated Rothmannia species is quite variablewithin a species and even a variety. It ranges from 24.0 mm - ² to 160.0 mm - ² with anaverage range from 29.5 to 89.6 mm - ² (see Table 11 for details).Although the stomatal density in the aberrant taxon, R. globosa is higher(58.0–75.0 mm - ²) compared to Kochummenia stenopetala (20.0–37.0 mm - ²) and R.macrophylla (30.0–40.0 mm - ²), it overlaps with species of Rothmannia.There appears to be little taxonomic utility for stomatal density in this group.166