Pacific Science Volume 34, Number 1, 1980

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Pacific Science is a quarterly publication devoted to the biological and physical sciences of the Pacific Region.

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    A New Sciaphila (Triuridaceae) from the Palau Islands
    (University of Hawaii Press, 1980-01) Fosberg, F.R. ; Sachet, Marie-Helene
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    Infrageneric Relationships and the Origin of the Hawaiian Endemic Genus Lipochaeta (Compositae)
    (University of Hawaii Press, 1980-01) Rabakonandrianina, Elisabeth
    Infrageneric relationships of Lipochaeta were assessed by way of a controlled crossing program that produced 14 intrasectional and 5 intersectional hybrid combinations involving the two sections Aphanopappus and Lipochaeta. Results from uniform culture and hybridization studies confirm that specific differences involving many traits such as leaf shape, the number of disk floret lobes, and achene morphology have a genetic basis. Fertility data based on pollen stainability and achene set of some of the hybrids revealed that members of the same section are highly interfertile, whereas the two sections are extremely well isolated from each other reproductively. Cytogenetic evidence suggests that this isolation is due primarily to a difference in the ploidy level of the two sections and that section Lipochaeta, with n = 26, has an allopolyploid origin from a IS-paired taxon similar to a diploid Lipochaeta and an unknown II-paired taxon in the extra-Hawaiian genus Wedelia. Chromosome counts for three diploid species and one tetraploid variety are reported for the first time.
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    Sandalwood in the Cook Islands
    (University of Hawaii Press, 1980-01) Sykes, W.R.
    Reports of sandalwood, Santalum sp., being present on Rarotonga in the early part of the nineteenth century are presumably incorrect, because no specimens from there have ever been found. However, sandalwood does grow on Mitiaro to the northeast and is here named as a new variety of S. insulare Bert. Within this widespread French Polynesian species the Cook Island plant is closest to the type variety from the Society Islands.
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    Vegetative Anatomy of the Hawaiian Species of Santalum (Santalaceae)
    (University of Hawaii Press, 1980-01) Stemmermann, Lani
    Wood and foliar anatomy of the Hawaiian representatives of the genus Santalum are described. No consistent differences in wood anatomy between taxa were found; however, significant anatomical differences in foliar anatomy were observed. Characteristics of leaf anatomy that are of taxonomic value are the bottle-shaped adaxial epidermal cells of S. haleakalae, the papillate nature of the abaxial leaf surface in several taxa, and the presence of adaxial as well as abaxial stomata in S. ellipticum.
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    Observations on the Genus Santalum (Santalaceae) in Hawaii
    (University of Hawaii Press, 1980-01) Stemmermann, Lani
    Some of the taxonomic problems of species of Santalum in Hawai'i are resolved by proposing one new taxon and two combinations. These are based on observations of the genus in the field, herbarium studies, and anatomical differences found.
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