Abstract
Calcareous soil and dry climate are characteristic of Madura Island, located on the east coast of Java, Indonesia. The group of flowering plants that adapted to these conditions is the genus Cleome L. (Cleomaceae). In 1963, Backer and Bakhuizen van den Brink Jr. only listed three species of Cleome from Madura, i.e., C. aspera J.König ex DC., C. gynandra L., and C. viscosa L. Since then, the updated data on the genus Cleome of Madura is not provided yet. Therefore, this study aimed to provide updated information on the genus in Madura island. The botanical exploration was conducted at Bangkalan, Sampang, Pamekasan, and Sumenep in December 2019 to January 2020. The two additional species, namely C. chelidonii L.f. and C. rutidosperma DC., were reported for the first time in Madura. Both species were considered as the newly distributional record for the island. Cleome chelidonii was found in Gapura Tengah (Sumenep Regency), and C. rutidosperma was collected from Kamal (Bangkalan Regency). The botanical information on both species is presented, including the updated key to the Cleome of Madura Island. This study provides updated information on genus Cleome in Madura and reporting the existence of Cleome chelidonii and Clome rutidosperma from the island. The presence of both species was considered as a newly distributional record.
Highlights
Madura Island is located in the Northeastern part of Java, and it comprises an area of 4.382 km2 (Flathe & Pfeiffer, 1963; Uhlig, 1980)
The significant parts of Madura island consist of limestone beds with typical karst (Flathe & Pfeiffer, 1963; Uhlig, 1980; Spaggiari et al, 2018). This island has a dry climate due to the monsoon winds (Rifai, 2007). These conditions cause the type of vegetation on Madura island is mixed monsoon forest (Backer & Bakhuizen van den Brink, 1965; Rifai, 2007)
Our study revealed that two additional species were recently found in Madura: Cleome chelidonii L.f. and Cleome rutidosperma DC
Summary
Madura Island is located in the Northeastern part of Java, and it comprises an area of 4.382 km (Flathe & Pfeiffer, 1963; Uhlig, 1980). The significant parts of Madura island consist of limestone beds with typical karst (Flathe & Pfeiffer, 1963; Uhlig, 1980; Spaggiari et al, 2018) This island has a dry climate due to the monsoon winds (Rifai, 2007). A few botanical research was conducted in Madura because the flora composition is still considered the same as the Eastern part of Java (Backer & Bakhuizen van den Brink, 1965). This causes the information on flora Madura to have not been wholly recorded, and a specific book on Flora of Madura is not provided yet (Irsyam, 2015). The updated key to the genus Cleome of Madura, descriptions, photographs, and brief discussions are provided
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