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Four species of Impatiens were collected from Mt. Singgalang, West Sumatra, Indonesia, namely I. singgalangensis Grey-Wilson, I. buennemeijeri Grey-Wilson, I. delectans Rild., and I. diepenhorstii Miq., of which the last three were collected in this mountain for the first time. I. buennemeijeri where previously reported to be endemic to Mt. Malintang, Likewise, I. delectans and I. diepenhorstii were reported as Mt. Kerinci endemics but are successfully collected here in the forests of Mt. Singgalang. Here descriptions, illustrations, and preliminary conservation status of those species are provided.

Ecological study of Invasive Alien Species (IAS) at two altitudes in Mount Gede PangrangoNational Park was carried out by using quadrate method. The studied plots located at altitude1400 m and 1500 m a.s.l, in 0.2 ha each. The result shows that 45 species of trees, 77 species ofsaplings and 48 species of seedlings were recorded. Five species (i.e. Bartlettina sordida,Austroeupatorium inulaefolium, Cestrum aurantiacum, Brugmansia suaveolens and Passiflorasuberosa) are catagorized as IAS which threaten the ecosystem and natural species.

Wood density is the functional character which has important role in the function of ecosystem. Stem and branch wood density have different trait and effect on its ecosystem processes. The objectives of this research are to know the diversity of stem and branch wood density and to analyze whether branch wood density could be used to estimate stem wood density in the Mount Papandayan. Six plots of 0.1 ha at different sites (three plots each in interior and edge forest) were established. Branches were collected from trees with diameter at breast height larger than 10 cm, while stem wood density data were obtained from some wood density sources. Research results showed that stem wood density ranges were 0.35–0.82 g/cm3, while branch wood density ranges were 0.33–0.61 g/cm3. Average of branch wood density was lower (0.48 ± 0.09 g/cm3) than stem wood density (0.61 ± 0.1 g/cm3). Linear regression analysis indicated that branch wood density could be used to estimate stem wood density of trees in Mount Papandayan which is showed by R2 value and correlation coefficient of 0.28 and 0.55 (p value < 0.001) respectively.

Sulistyawati E, Tihurua EF. 2019. Analysis of the condition of forest interior and edge in Mount Papandayan, West Java, Indonesia based on floristic composition and structural characteristics of tree community. Biodiversitas 20: 900-906. Forest fragmentation creates forest edges that possess different biotic characteristic in comparison to its interior. Those differences may include difference in vegetation structure and composition, and ecological processes in the ecosystem. This study aims to compare the condition between forest interior and forest edge in Mount Papandayan and provide assessment of the overall condition of the forest based on its floristic and structural characteristics. We conducted vegetation analysis of tree in which six plots, each of 0.1 ha, were established in the forest interior and forest edge. Based on the results, species richness and diversity of tree were higher in the forest interior than the forest edge. Based on the importance value index, the proportion of co-dominant species in forest edge sites were higher than in the forest interior sites. In addition, tree density, regeneration potential, total basal area, wood density average, and biomass were higher in the forest interior than in the forest edge. Overall, Mount Papandayan suffers moderate disturbance, which follows through the intermediate disturbance hypothesis and this can be seen from its relatively high diversity index of tree yet it has moderate wood density average.

Keanekaragaman tumbuhan tidak hanya terlihat secara morfologi, tetapi dapat dibedakan pula secara anatomi. Ciri anatomi dapat digunakan sebagai pendukung dan penguat pengklasifikasian jenis tumbuhan. Penelitian ini bertujuan untuk mengetahui ciri anatomi daun yang dapat digunakan sebagai penciri taksonomi dalam suatu tingkatan taksa melalui perwakilan jenis. Jenis yang digunakan berjumlah 15, yang merupakan perwakilan dari 12 suku tumbuhan berbunga Indonesia. Metode parafin digunakan untuk mendapatkan penampang transversal dan metode perendaman dengan asam nitrit (HNO3) digunakan untuk mendapatkan penampang epidermis daun. Sebagian ciri anatomi pada penelitian dapat digunakan sebagai penciri suku hingga jenis. Hasil penelitian menunjukkan bahwa 15 jenis yang diamati memiliki kesamaan ciri anatomi dengan data penelitian terdahulu yang telah dilakukan baik pada tingkat suku, marga maupun jenis. Kesamaan ciri anatomi tersebut mencakup satu hingga beberapa ciri seperti tipe stomata, dinding antiklinal sel epidermis, jaringan mesofil, dan berkas pengangkut (tangkai daun dan tulang tengah daun). Kesamaan ciri yang didapatkan pada masing-masing jenis menunjukkan bahwa ciri pada struktur anatomi daun dapat menjadi bukti pembatasan takson pada tumbuhan berbunga.

Alocasia, Colocasia and Remusatia are the genera of Araceae family which have high economic value, such as for food and ornamental plants. Those three genera, previously treated as Colocasieae tribe. Later, based on Nauheimer, L. et al. study in 2012, using plastid and nuclear DNA, Alocasia is placed in different tribe. Study on leaf anatomy of Araceae is still poor known. Comparison of three genera of Araceae, indicates a difference in the epidermis. Alocasia and Colocasia have stomata on both leaf surfaces (amphistomatic) but Remusatia has stomata only limited on the lower surface. The three genera can be distinguished from epidermal cell shape, stomata complex and the presence of stomata.

In order to know the habitat preference gradation for gall-forming insects from the border to the middle of the habitat or more precise the edge effect on the galling existence and the expansion ability of local gall to infect on non indigenous species, observation of all plant life collections block by block in the Bogor Botanic Garden were done. Host plant and galling insect species composition differed quite characteristically between the edge and the interior of paths, but did not for galling insect richness. Insect gall richness was expressed as the ratio between insect gall and host plant richness (gall per plant ratio) and in the same time a weak relationship of insect species–area was found. Our results suggest that the number of galling insects per individual plant is not affected by the size of the patch. Despite these results, the natural forest patches are found in this region seem well suited for long-term studies addressing species–area relationships.

Maesopsis eminii is one of alien and invasive plant in Indonesia and planted in Resort Bodogol, Gunung Gede Pangrango National Park. The results showed M. eminii has dorsiventral and hypostomatic leaf type with anomocytic stomata, drusse type of CaCO3 crystal, multicellular and uniseriate trichomes in the upper and lower surface. While its stem has variation in its ray initial layer depend on its trunk circumference.

Leaf anatomy of Piperaceae from Gunung Slamet, Central Java has made with standard paraffin and paradermal method. The results showed that Piperaceae has dorsiventral leaf, hypostomatatic or amphistomatatic, tetracytic and cyclocytic stomata type. Hypoderm tissue exist in upper and/or lower part of leaf, mesophyll was arranged by 1-2 layers of palisade and 2-7 layers of sponge tissue. There were 3 types of trichome i.e. glandular trichome which had globose cell with short stalk, bicellular glandular trichome and multicellular & uniseriate non-glandular trichome. The shape of the crystal of Piperaceae from gunung Slamet are sand, needle, drusse or prismatic which distributed in hypodermis, mesophyll and midrib. Piperaceae petiole was arranged by open or sometimes closed circle vascular bundles. These open vascular bundles were crescent shape or resemble to U and V shapes.

Study in leaves anatomy of twenty nine samples of the species classified under Pandanus, Freycinetia and Sararanga of Pandanaceae had been undertaken to unravel generic relationship among of these taxa with a view to provide a set of diagnostic characters for taxonomic identification. The fourth genus of Pandanaceae, Benstonea is not included in this analysis since there are no representative samples. Four anatomical diagnostic characters had been identified at the generic level such as present and absent of papillae, stomatal arrangement types, present and absent of bundle sheath extension and hypodermal thickness and its shape. Pandanus has papillae, amphistomatous stomata, bundle sheath extension present and hypodermis thin and rectangular; Freycinetia lacked of papillae, stomata hypostomatous or amphistomatous, bundle sheath extension absent and hypodermis thick and hexagonal or rounded; meanwhile Sararanga has no papillae, stomata amphistomatous, bundle sheath extension absent and hypodermis thin and flatten. An identification key to those genera based on anatomical diagnostic characters is provided.

Three variations of Arundina graminifolia flowers have been recognized, (1) group of big flower with reddish violetlip and purplelish white sepals and petals (2) group of small flower with white lip and white sepals and petals (3)similar to second variation but with purple color on the lip apex. In order to clarify the taxonomy status of thosethree variations, a leaf anatomical study had been carried out. Results of this study showed that there were somedifferences among them in trichome shape and number mesophyll layers. Big flower group of Arundina hastrichome club shape and thick mucous in the apex with mesophyll layer 9-11; for small flower group has white lip,trichome club shape, thick mucous and granulate in the apex, but only 2 mesophyl layers; whereas for other smallflower group with purple lip has trichome cup shape and 10-13 layers of mesophyll. Based on the differences inflower size and their color variation, and combined with leaf anatomical study, we suggested the three variationsof A. graminifolia should be in separated groups.