Transactions of the Royal Society of New Zealand . In certain other cases, where there are a host of intergrading forms,the most divergent are treated as separate species notwithstanding that theyare connected by intermediates. An example of this is Veronica pinguifoliaHook. f. and V. Buchanani Hook, f., of which latter species Cheesemanwrites (p. 527), Larger forms approach V. pinguifolia so closely thatit is difficult to draw a line of demarcation between the two var. major might be referred to either. Other examples of similar * It seems possible also that P. divaricatum consists
Transactions of the Royal Society of New Zealand . In certain other cases, where there are a host of intergrading forms,the most divergent are treated as separate species notwithstanding that theyare connected by intermediates. An example of this is Veronica pinguifoliaHook. f. and V. Buchanani Hook, f., of which latter species Cheesemanwrites (p. 527), Larger forms approach V. pinguifolia so closely thatit is difficult to draw a line of demarcation between the two var. major might be referred to either. Other examples of similar * It seems possible also that P. divaricatum consists of two elementary species, foundin the steppe and forest climates of the South Island respectively. See Plate VIII, andcompare it with the figure in Diels (1906). t Biologically some are certainly distinct entities, as, , the variety macrophyllum,which Petrie has made into a species under the name E. erectum, and which is greatlyon the increase where forest is being removed in the Wairaarino locality. Trans. Inst., Vol. XLIV. Plate Example of a Taxonomic Species. On right and left, adults of Pittosporum rigidum, not distinguished as varietiesin centre, juvenile .form of plant on right. Face p. 4.] Trans. Inst., Vol. XLIV Plate II.
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