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| Gymnostachyum calcicola Rafidah, in Rafidah, Nazrah et Ong, 2024. |
Abstract
A new species, Gymnostachyum calcicola Rafidah, sp. nov. (Acanthaceae) is described from limestone karst in Peninsular Malaysia. Characters distinguishing it from related species, colour photographs, botanical illustration and provisional conservation status are provided.
Key words: Andrographideae, endemic, flora, Kelantan, taxonomy
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| Gymnostachyum calcicola Rafidah A flowering plant B portion of inflorescence with flowers C flower D flower with opened corolla E bract, calyx and carpel with corolla and stamens removed F indumentum of anther along longitudinal line of dehiscence G anthers (dorsal and ventral views) H seeds I fruit J-K attachment of seeds (all drawn by Mohd Aidil Nordin). |
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| Gymnostachyum calcicola Rafidah A habit B flower (side view) C flower (front view) D portion of inflorescence showing dichasial cymose branches E portion of infructescence. |
Gymnostachyum calcicola Rafidah, sp. nov.
Diagnosis: Unique among Peninsular Malaysian species of Gymnostachyum by having a racemose inflorescences occasionally lower axils with pairs of flowers and dichasium inflorescence with opposite branches. Gymnostachyum calcicola shows affinity with Gymnostachyum decurrens var. decurrens and var. robinsonii by its crowded rosette leaves at the base, however it is different in the inflorescences type.
Etymology: The specific epithet refers to the limestone habitat of this species.
Abdul Rahman Rafidah, Abdul Rahman Ummul Nazrah and Poh Teck Ong. 2024. Gymnostachyum calcicola (Acanthaceae), A New Species from Limestone Karst of Peninsular Malaysia. PhytoKeys. 242: 273-280. DOI: 10.3897/phytokeys.242.122869
