Abstract
As part of the Flora of Peninsular Malaysia Project, a species checklist of the genus Capparis in Peninsular Malaysia is presented here with a total of 11 species, two subspecies and four varieties. A new species and two varieties, endemic to Peninsular Malaysia, are described and illustrated: Cappariskenaboiensis, C.scortechiniivar.ruthiae and C.trinerviavar.chungiana. Cappariskenaboiensis is known from a single site in Negeri Sembilan and is assessed as Vulnerable (VU); C.scortechiniivar.ruthiae from Pahang is Vulnerable (VU); and Capparistrinerviavar.chungiana is known from Negeri Sembilan, Pahang and Selangor and its conservation status is assessed as Near Threatened (NT). A checklist and updated key to the genus in Peninsular Malaysia are provided.
Highlights
Capparis L., comprising from 130 to 141 species, is the largest genus in Capparaceae (POWO 2019; Souvannakhoummane et al 2020) and distributed in the tropical and subtropical regions of the Old World
These members were placed into four groups within this section: Capparis scortechinii King and C. trinervia Hook.f. & Thoms. in the Trinervia-Group; C. diffusa Ridl., C. erycibe Hallier f., C. sepiaria L. and C. versicolor Griff. in the Subumbellates-Group; C. pubiflora DC. in Cataphyllosa-Group; and C. acutifolia Sweet, C. cucurbitina King and C. micracantha DC. in the Seriales-Group
During a study of Capparis specimens for revisionary work on the genus for the Flora of Peninsular Malaysia account, several specimens which were determined as previously-described species were critically re-evaluated as two undescribed taxa
Summary
Capparis L., comprising from 130 to 141 species, is the largest genus in Capparaceae (POWO 2019; Souvannakhoummane et al 2020) and distributed in the tropical and subtropical regions of the Old World. Monostichocalyx, characterised by the well-developed persistent leaves, sepals free in bud and dimorphic in which the outer sepals are larger in size, enclosing the narrower inner pair of sepals (Jacobs 1960: 410) These members were placed into four groups within this section: Capparis scortechinii King and C. trinervia Hook.f. During a study of Capparis specimens for revisionary work on the genus for the Flora of Peninsular Malaysia account, several specimens which were determined as previously-described species (following Jacobs 1965) were critically re-evaluated as two undescribed taxa. These two are clearly distinct in several of their vegetative and reproductive characters from any known species. A key is provided to facilitate identification of the species
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