n = 5. Figs. 44-53, 61a-d.
Although there are two separate reports of H. olensoi from Australia, the label data are conidered unreliable and Touw (1971) suggested hat it is a New Zealand endemic with two vaieties. The species is in section Comosa. The ve populations investigated all had the chrolosome number n = 5 (Table I, Appendix I). Jivalents in this species were more distinctly haped (Figs. 44, 45, 49, 61a-c) than in other pecies with five chromosomes, in which the bialents were generally globular in form. The count vas confirmed at metaphase I (Figs. 44, 45, 49, Id), anaphase I (Fig. 47) and anaphase II (Fig. 50) of meiosis as well as female gametophytic nitosis (Fig. 52). The five chromosomes aligned n Fig. 53 consist of one large metacentric, two intermediate in size, one metacentric the other submetacentric, and two smaller chromosomes, one submetacentric and the smallest metacenric. The chromosomes are smaller but quite simlar to those of H. menziesii in section Sciaclalus.