No abstract

Bryophytes consisting of three division, there are Bryophyta (mosses), Marchantiophyta (liverworts) dan Anthocerotophyta (hornworts). Marchantiophyta are divided in two types, leafy liverworts and thallose liverworts. Mount Ungaran which has many diversity of Bryophytes but research about Bryophytes in this area are sparse. The aim of this research was to observe diversity of Marchantiophyta on tree trunks in montane zone (altitudes 1300 to 2050 meters above sea level). Sampling was conducted in April and May 2012 at three different altitudes ( 1355, 1660, and 2040 meters above sea level). Identification of Bryophytes was carried out at Laboratorium of Ecology and Biosistematics, Department Biology, Faculty of Science and Mathematics, Diponegoro University, Semarang, Indonesia. The results shown there are 9 families with 26 species belonging to the division Marchantiophyta.   Keywords: Epiphytic Marchantiophyta, Mount Ungaran, diversity, montana zone.

Zingiberaceae merupakan tumbuhan obat yang menjadi komoditas unggulan. Kabupaten Semarang merupakan salah satu sentra distribusi Zingeberaceae. Faktor lingkungan yang mempengaruhi distribusi Zingiberaceae adalah ketinggian tempat, kelembaban, suhu udara, pH tanah, dan intensitas cahaya. Tujuan penelitian ini adalah untuk mengkaji jenis-jenis tumbuhan anggota Zingeberaceae, distribusi Zingiberaceae, dan pengaruh ketinggian tempat terhadap distribusi Zingiberaceae di Kabupaten Semarang. Penelitian dilaksanakan pada bulan September sampai November 2010. Pengambilan sampel tumbuhan famili Zingiberaceae dilakukan di lima kecamatan Kabupaten yang memiliki ketinggian berbeda . Analisis data dilakukan dengan menggunakan indeks nilai penting, derajat konstansi, dan analisis korelasi pengaruh ketinggian tempat terhadap distribusi Zingiberaceae. Dari hasil penelitian didapatkan 12 jenis dan satu varietas tumbuhan anggota Zingeberaceae di Kabupaten Semarang. Jenis yang mempunyai nilai penting tinggi adalah Curcuma domestica (kunyit) dan Amomun cardomomum (kapulaga).  Jenis  yang mempunyai distribusi paling luas di Kabupaten Semarang adalah Amomum cardomomum, Curcuma xanthorrhiza, Curcuma domestica, Zingiber americans dan Zingiber officinale. Kata kunci : Distribusi, Zingiberaceae, Ketinggian Tempat, Kabupaten Semarang.

Gebugan Nature Reserve is one of the protected forest that still has the natural habitat of Dacrycarpus imbricatus. D. imbricatus has the potential of producing wood that is widely used by the people while the exploitation of Jamuju causes this tree species difficult to find in their natural habitat. The aim of this research was to asses D. imbricatus regeneration. The method used for taking jamuju was systematic method. The number of plots used were 15 with 10 m x 10 m area for each plot. The number of individual jamuju at the tree level, pole level, sapling level and seedling level were counted at each plot. The result of this research showed the regeneration of jamuju in Gebugan Nature Reserve was poor, indicated by tree-level individual density (5 individuals/0.15 ha = 33.3 ind/ha), pole level (not found), sapling (4 individuals/0.15 ha = 26.6 ind/ha), and seedlings (21 individuals/0.15 ha = 140 ind/ha). The environmental factors of Jamuju were found to grow at the altitude of 1,050 m asl, temperature 26.7°C to 27°C, humidity 53% to 61%, soil pH 6.3 to 7.

The diversity of Dioscorea spp. both inter-species and intra-species are spreaded in several areas in Central Java, including Banjarnegara.  Dioscorea is a  plant that has the potentials to be developed and cultivated. The purposes of this reasearch are to identify the species, characterize the morphological characters (stem, leaf, and tuber) of eight varians Dioscorea spp from Banjarnegara. The sample used in this reasearch are the eight varians of Dioscorea spp from Banjarnegara.  The Identification was done by using a identification keys. Characterization of morphological characters was done by using the guidebook of Descriptor for Yam. The results showed that eight cultivars of Dioscorea spp are grouped into two types: Dioscorea alata and Dioscorea esculenta. Dioscorea alata has a stem which rotate the to the right, rectangular shaped of stem, it’s has wing and doesn’t have a spin, elongated heart-shaped leaves, oval-oblong and round shaped tuber. Dioscorea esculenta has a stem which rotate to the left, rounded shaped of stem, it has not wing but spiked, dilated heart-shaped leaf, and oval shape tuber.  Keywords: Dioscorea spp, identifikasi, characteristic, morphology,