Australian Tropical Rainforest Plants - Online edition
Mesosphaerum pectinatum (L.) Kuntze
Kuntze, C.E.O. (1891) Revisio Generum Plantarum 2: 525.
Comb hyptis; Hyptis, Comb
Usually flowers and fruits as an erect herb but may reach 4 m.
Leaf bearing twigs +/- 4-angled, twigs and leaves aromatic or not aromatic when crushed. Leaf blades about 2-8 x 1-4.5 cm. Hairy on both leaf surfaces, usually denser on underside.
Inflorescence a 6-15-flowered cyme. Calyx about 2.5 mm long, 10-ribbed, lobes linear, all parts of the outer surface of the calyx clothed in hairs. Corolla white to pale blue or pink-tinged, 3-3.5 mm long.
Cotyledons about 3-5 x 4-6 mm, reniform. First pair of leaves opposite, margins crenate with about 3-5 teeth, upper and lower surfaces of the leaf blade hairy. At the tenth leaf stage: crushed plant parts emit an odour like that of mint (Mentha sp.) leaf margin irregularly serrate. Leaf petiolate. Stem square in transverse section.
A serious tropical weed.
Hyptis pectinata (L.) Poit., Ann. Mus. Par., vii: 474 (1806). Nepeta pectinata L., Systema Naturae Edn. 10, 2: 1097 (1759), Type: Browne s.n., Jamaica.