Acta Phytotaxonomica et Geobotanica
Online ISSN : 2189-7042
Print ISSN : 1346-7565
ISSN-L : 1346-7565
Volume 55, Issue 3
Displaying 1-7 of 7 articles from this issue
  • MASAHIRO KATO
    Article type: Article
    2004 Volume 55 Issue 3 Pages 133-165
    Published: December 10, 2004
    Released on J-STAGE: March 23, 2017
    JOURNAL FREE ACCESS
    Recent field work and collections, along with herbarium work, have discovered that three crustaceous-rooted genera with 13 species of subfamily Podostemoideae occur in Thailand. They are two species of Hanseniella, one of which (Ha. smitinandii) is new, the recently described genus and species, Thawatchaia trilobata, and 10 species of Hydrobryum, including six new species and one new variety: Hy. chiangmaiense, Hy. kaengsophense, Hy. khaoyaiense, Hy, loeicum, Hy. somranii, Hy. tardhuangense, and Hy. micrantherum var. crassum. Thailand is a center of distribution for the monophyletic group of Hydrobryum, Hanseniella and Thawatchaia, which are distributed throughout Thailand except in the peninsular. All the species and varieties are described. A key to the species, a table of diagnostic reproductive characters, lists of synonyms and illustrations are provided.
    Download PDF (3167K)
  • HIROSHI AZUMA, VICTOR RICO-GRAY, JOSE G. GARCIA-FRANCO, MASAO TOYOTA, ...
    Article type: Article
    2004 Volume 55 Issue 3 Pages 167-180
    Published: December 10, 2004
    Released on J-STAGE: March 23, 2017
    JOURNAL FREE ACCESS
    The floral scents of Magnolia coco (distributed in Asia) and M. mexicana (New World), plus two Mexican Magnolia taxa, M. schiedeana and M. dealbata, were analyzed using GC-MS. A molecular phylogenetic analysis was also conducted using a combined data set of plastid DNA sequences obtained from GenBank to construct a well-resolved phylogenetic tree. The analysis indicated a sister relationship between subtropical-tropical Asian and American disjunct groups (including M. coco and M. mexicana) which was not shown in previous studies. Entire flowers and floral parts (sepals, petals, and gynoecia) of M. coco emitted methyl 2-methylbutanoate (83-96%), whereas entire flowers of M mexicana emitted α-farnesene (67%) which was mainly emitted from the sepals. The petals and gynoecium of M. mexicana emitted methyl 2-methylbutanoate as the main component with relatively small amount of α-farnesene. The common presence of methyl 2-methylbutanoate in the petals and gynoecium of both taxa may represent an ancestral scent profile because subtropical-tropical disjunct groups, which include M. coco in one and M. mexicana in the other, phylogenetically show a sister relationship. The floral scent of M. schiedeana was exclusively composed of monoterpenes, especially geranyl methyl ether (87%). The floral scent of M. dealbata was predominantly composed of benzenoids, especially 2-phenylethanol (78%) and methyl phenylacetate (13%).
    Download PDF (1115K)
  • KAORUKO KURATA, TANGUY JAFFRE, HIROAKI SETOGUCHI
    Article type: Article
    2004 Volume 55 Issue 3 Pages 181-197
    Published: December 10, 2004
    Released on J-STAGE: March 23, 2017
    JOURNAL FREE ACCESS
    Taxonomy of Nepenthes has been exclusively based on pitcher morphology that well characterizes the carnivore. In order to understand the morphological diversity and to re-examine taxonomical diagnosis of the Nepenthes taxa in New Caledonia, the pitcher morphology was carefully studied based on 221 matured upper pitchers of 124 individuals from seven localities of the island. For this purpose, we investigated size of pitchers and of their lids, number and density of nectar glands on lids, number and density of digestive glands in pitchers and ratio of digestive zone vs. waxy zone in pitchers. These morphological features varied widely between the populations though they are mostly stable within an individual plant. Statistical analyses did not segregate any population and supported the taxonomical treatment to unite several taxa into an insular endemic, Nepenthes vieillardii Hook. f. in New Caledonia. The number of digestive glands and area of digestive zone in pitcher varied greatly between populations suggesting that some ecological factors do affect the morphological diversity of pitchers.
    Download PDF (2178K)
  • HIROKI YAMAJI, JUN YOKOYAMA, JAE-HONG PAK, MASAYUKI MAKI
    Article type: Article
    2004 Volume 55 Issue 3 Pages 199-205
    Published: December 10, 2004
    Released on J-STAGE: March 23, 2017
    JOURNAL FREE ACCESS
    Asarum maculatum Nakai, a perennial herb endemic to southern Korea, is unique in its variegated leaves. However, the independence of this species is doubtful because the species co-occurs with A. sieboldii Miq. var. sieboldii in the same geographical area in Korea, and no significant difference is found between the two taxa in external morphology, except for leaf variegation. We examined the genetic differentiation between A. maculatum and A. sieboldii van sieboldii using enzyme electrophoresis. The genetic differentiation between the two taxa in the same locality was not greater than that among the intraspecific populations. Moreover, there is little genetic differentiation between the mixed populations of the two taxa and the populations composed only of A. sieboldii var. sieboldii. Consequently, A. maculatum is not differentiated genetically from A. sieboldii var. sieboldii, and the two taxa should be regarded as the same species. Hence, a new combination, A. sieboldii f. maculatum (Nakai) Yamaji (comb, et stat. nov.), is proposed.
    Download PDF (529K)
  • SHUN-ICHI MATSUMURA, YOICHI TATEISHI, JUN YOKOYAMA, MASAYUKI MAKI
    Article type: Article
    2004 Volume 55 Issue 3 Pages 207-212
    Published: December 10, 2004
    Released on J-STAGE: March 23, 2017
    JOURNAL FREE ACCESS
    New localities of Canavalia rosea were found on Okinawa and in the Amami Islands of the Ryukyu Archipelago. The locality on Amami-Oshima marks the northern-most limit of the species in Asia and extends its range approximately 490 km northeastward. At its newly discovered locations, C. rosea is pollinated by female leaf cutter bees and bears fruit. We suspect that the presence of three closely related species of Canavalia with flowers morphologically similar to those of C. rosea is probably one of the main reasons for the visitation by leaf cutter bees to C. rosea in the Ryukyu Archipelago. The female bees exhibited two patterns of behavior during flower visitations and effectively pollinated the flowers of C. rosea only when collecting both pollen and nectar. Pollinators of C. rosea have been reported as being anthopholid bees elsewhere, but are leaf cutter bees in the Ryukyu Archipelago.
    Download PDF (541K)
  • STEPHAN GALE, KAZUMI FUJIKAWA, HIDEKI OHBA
    Article type: Article
    2004 Volume 55 Issue 3 Pages 213-216
    Published: December 10, 2004
    Released on J-STAGE: March 23, 2017
    JOURNAL FREE ACCESS
    Chromosome numbers for three taxa of Saussurea DC. from the Nepal Himalaya are reported here for the first time: S. nepalensis Spreng., S. taraxacifolia (Royle) DC. var. glabrescens K. Fujikawa & H. Ohba and S. wernerioides Sch. Bip. ex Hook. f. were all found to be diploid with 2n=32. Material of S. obvallata (DC.) Edgeworth, also collected from Nepal, yielded counts of 2n=32, corroborating previous reports for the species in other parts of its range.
    Download PDF (726K)
  • Article type: Index
    2004 Volume 55 Issue 3 Pages i-
    Published: December 10, 2004
    Released on J-STAGE: March 23, 2017
    JOURNAL FREE ACCESS
    Download PDF (22K)
feedback
Top