Cyrtosperma prasinispathum A.S.D.Irsyam & M.R.Hariri is a newly described species of Lasioid discovered in Sorong, Southwest Papua Province, Indonesia. This new species is exclusively described from living specimens that are kept at the Bogor Botanic Gardens. Morphologically, it has a glossy leek-green spathe that is deflected, with a yellowish-green or yellow spadix. Its striking-colored spathe made this species an important candidate for horticultural plants.

Preservation effort to prevent tree collections loss even on aged trees (> 100 years old) is one of important missions in Bogor Botanical Garden since its establishment in 1817. Abiotic factors such as global warming and biotic factors from pests and diseases can threaten the survival of aged tree collections. Their survival is also influenced by plant health’s deterioration as they age. As the BBG has many functions not only for conservation but also for human ecological activities, fallen tree accidents are becoming primary concern to prevent biodiversity loss and people’s lives. We examined 154 trees health to determine a falling probability of 1106 aged trees based on several factors that caused to fall in the past and to make model prediction generated by nine supervised machine learning algorithms. We also classify susceptibility of tree families prone to fall from the highest accuracy of algorithm prediction. Inverse Distance Weighted interpolation method was used to depict zone map of trees prone to fall. The prediction showed that Random Forest model had the highest accuracy and low false negative (FN) value which were important to minimize error calculation on aged trees was not prone to fall but it turns out to be prone to fall. It predicted 885 trees prone to fall which 358 had high probability to fall. Fabaceae, Lauraceae, Moraceae, Meliaceae, Dipterocarpaceae, Sapindaceae, Rubiaceae, Myrtaceae, Araucariaceae, Malvaceae, and Anacardiaceae were tree families that were highly predicted to fall.

Bogor Botanic Gardens is an ex-situ plant conservation area in Indonesia. Since BBG is 103 years old, many collections are 100 years old or older. These antique collections may sustain damage, such as broken or collapsing, endangering visitors and employees. As a result, monitoring tree health at BBG is a critical task. According to the tree health monitoring data, 73 of 244 trees were further checked using the PiCUS Sonic Tomograph. Trees from the Fabaceae (31%) and Myrtaceae (10%) families were the most frequently checked. Walnuts trees from the Burseraceae family had the most specimens (47,94%). The PST effectively provides an immediate picture of the stem condition by calculating solid and decaying wood percentage values.

Eucalyptus alba Reinw. ex Blume merupakan pohon pusaka di Kebun Raya Bogor yang ditanam pada tahun 1892 (umur 130 tahun di tahun 2022), hanya ada satu spesimen, dan memiliki bentuk batang yang unik. Pohon dengan kategori pusaka ini perlu dilestarikan dengan memperhatikan kondisi kesehatannya. Tujuan penelitian ini adalah menganalisis kondisi kesehatan pohon secara visual dan teknologi tomografi serta rekomendasi penanganannya. Metode yang digunakan adalah pengamatan visual berdasarkan International Society of Arboriculture dan teknologi tomografi menggunakan PiCUS 3 Sonic Tomograph. Hasil penelitian menunjukkan bahwa secara visual E. alba memiliki potensi tumbang/patah yang rendah pada batang utama. Namun setelah dilakukan pengukuran pelapukan pada batang utama di berbagai level ketinggian dengan teknologi tomografi, hasilnya adalah di ketinggian 50 cm (95%), 140 cm (76%), 550 cm (18%), dan 810 cm (11%). Oleh karena itu, E. alba memiliki potensi tumbang yang besar pada batang bagian bawah karena persentase pelapukan yang melebihi 70% dengan diameter yang besar (275 cm). Rekomendasi penanganan pohon berisiko adalah mempertahankan proses fisiologis pohon dengan menjaga kesuburan tanah, pemasangan umpan rayap, pembuatan pagar melingkar ke arah utara, pengukuran pelapukan berkala (satu tahun sekali), dan pemberian papan informasi terkait kondisi terkini dan mitigasi bahayanya. Penebangan total atau sebagian tidak direkomendasikan mengingat status E. alba sebagai pohon pusaka.

Bogor Botanic Gardens is one of the outstanding green areas in Bogor City. Thousands of plant species are growing and providing suitable habitats and feed for various pollinators, such as butterflies, bees, and wasps. A well-designed pollination garden will benefit the pollinators and also create an educational facility for the community. This study aimed to select and characterize species of flowering plants that effectively attract pollinators, particularly Lepidoptera and Hymenoptera, in the pollination garden candidate area. The observa-tion had been carried out on 12 ornamental plant species: Pennisetum purpureum, Cosmos sp., Pachystachys lutea, Cuphea hyssopifolia, Orthosiphon aristatus, Lantana camara, Citrus aurantifolia, Buddleja davidii, Ixora javanica, Nerium oleander, Hibiscus rosa-sinensis, and Aglaia odorata. The method for observing pollinators was a standard walking method. Pollinator photos, its number, its visit time, and the plants it visited were recorded. A total of 23 species of Lepidoptera (20 species from 4 families and 3 species were unidentified) and 9 species of Hymenoptera (4 families) were found in the area with the best obser-vation time at 08.30-09.30 (GMT+7). The most visited plants by pollinators were Cuphea hyssopifolia, Lantana camara and Orthosiphon aristatus. Lepidoptera and Hymenoptera preferred blue-purple and bright-orange-yellow flowers. In addition, the flower characters that might influence pollinator visits are also described. The result would be an essential recommendation for plant selection, landscape design, and construction of the pollination garden in Bogor Botanic Gardens.

The main activity of botanic gardens is the recording of plants collection data in the accessible database form which also includies the dead record of trees collection. The dynamic data of dead tree collection not only important as a monitoring tool of the number of garden specimens, but also as a base of the decision-making process in entire botanic gardens’ landscape management especially in facing an increased worldwide threat to the plants’ diversity and its habitat. Bogor Botanic Gardens (BBG) has been developing over 202 years since the institution establishment in 1817. The research about dead trees collection at BBG was conducted using a quantitative descriptive method by identifying dead trees specimen’s data based on the number, family and location during the last 20 years. From the field of specimen’s location in the database, data was analyzed spatially to produce a map of dead tress distribution based on planting blocks (vak). A deeper interpretation of the distribution map might be a valuable source for the management recomendation for the collection’s maintenance practice of sustainable management’s support in the future.

Research on visitors’ landscape preferences in a botanical garden is useful for understanding what visitors see while they visit the site. Analyzing visitors’ preference by using GPS tracking data and Visitors’-Employed Photography (VEP) is one of approach that successfully implemented in some studies. GPS loggers and visitors’ photos were used in this study to identify and locate features considered impressive by visitors. This research involved 35 normal visitors of Bogor Botanical Garden (BBG) as respondents, who were asked to capture impressive landscape features while visiting the BBG. Each respondent used their own smartphone or camera to take photographs and recorded their actual positions using a GPS logger. The data of GPS tracking and geo-tagged photos were exported into ArcGIS. The 20 by 20 meters square cell were joined with points' data to calculate density of tracking points and photos points. A cell was categorized as hotspots if the number of points more than 2.5 times of standard deviation. The results show that respondents were concentrated on several geographic locations within the BBG; the most-photographed features were water, structures, and plants. Interestingly, the most-photographed plants were those arranged for recreational (rather than botanical or educational) purposes, suggesting new considerations for managers of botanical gardens.