Buletin Kebun Raya

8-11

Authors: Eka Aditya Putri Iskandar

Inventarisasi Fissidens spp. (Fissidentaceae, Bryophyta) di Kebun Raya Cibodas telah dilakukan. Pengoleksian dilakukan pada blok-blok yang ada di Kebun Raya Cibodas dan karakteristik dari setiap lokasi pengoleksian dicatat. Sebanyak enam puluh tujuh koleksi berhasil dikumpulkan dan diidentifikasi, yang mencakup 40% dari jenis-jenis yang disebutkan oleh Fleischer (1900-1902). Kunci determinasi menuju jenis-jenis Fissidens disajikan pula. Tiga jenis catatan baru dari Cibodas dilaporkan pada makalah ini, yaitu F. perpusillus, F. bryoides subsp. schmidii dan F. obscurirete.

19-27

Authors: Albertus Husein Wawo

There are two species of Jatropha in East Nusa Tenggara (NTT), i.e. physic nut (Jatropha curcas L.) and red jatropha or cotton leaved physic nut (1. gossypilfolia L). Both species possess potency as traditional medicine. Propagating jatropha by seeds could not be conducted throughout the year because the seeds were produced on certain time only. On dry season in 2005, a research had conducted in Teun Village, Belu Regency, NTT for studying the effect of shading and cutting storage on the growth of the two jatropha species. This research had 12 treatments with two replications and employed Factorial Experimental Design. The data were processed by SAS (Statistic Analysis System) program. The result of this research showed that the growth of physic nut better than that of red jatropha. Light shading stimulated the growth of buds, leaves and roots of cutting of jatropha on 60 days after planting. No significant was found in the growth of buds, leaves and roots of cutting of jatropha that were directly planted and stored for four days. Cutting of both species that stored for four days and placed under light shading (with 70% of light intensity) produced higher bud growth and root length than those placed under dense shading (with 30% of light intensity).

35-39

Authors: I Gede Tirta, I Nyoman Lugrayasa, Irawati Irawati

A study on epiphytic orchids in three locations (Senturan Forest, Mount Sidi and Mount Jarang) in Malinau District showed that most epiphytic orchids were found in location with moderate light intensity rather than in low and high light intensities. Many orchids were found on parts of trees covered by thin mosses rather than on thick mosses. Three hundred and seventy one orchid specimens were collected from the three locations and at least 71 specimens were new collections to 'Eka Karya' Botanic Garden, Bedugul.