Wadithamnus T.Hammer & R.W.Davis, 2017

Hammer, Timothy A., Davis, Robert W. & Thiele, Kevin R., 2017, Wadithamnus, a new monotypic genus in Amaranthaceae, Phytotaxa 295 (2), pp. 173-184 : 180

publication ID

https://doi.org/ 10.11646/phytotaxa.295.2.5

persistent identifier

https://treatment.plazi.org/id/03F2F15E-FFE7-FFE7-FF50-FB56FCC8A380

treatment provided by

Felipe

scientific name

Wadithamnus T.Hammer & R.W.Davis
status

gen. nov.

Wadithamnus T.Hammer & R.W.Davis View in CoL gen. nov.

Generitype: Wadithamnus artemisioides (Vierh. & O.Schwartz) T.Hammer & R.W.Davis

Diagnosis: —Erect shrubs; young stems, leaves, inflorescence axes and outer surfaces of tepals densely but shortly white-tomentose with dendritic hairs, these sometimes contracted and appearing stellate. Leaves simple, alternate, entire. Flowers bisexual, bracteolate, arranged in loose and panicle-like, 3(7)-flowered cymes each borne distantly along elongate axes, each cymule subtended by a bract, the bracteoles of the central flower enclosing the lateral flowers. Tepals 6 (4 inner and 2 outer), free, glabrous adaxially. Stamens 4, alternate to the inner tepals, all fertile, united at their base into a short staminal cup and alternating with short, triangular staminal cup appendages. Ovary glabrous, compressed-ovoid, that of the central flower compressed at right angles to the cyme bract, those of the lateral flowers at right angles to the central flower; ovule 1; stigma sessile, capitate. Capsule 1-seeded, thin-walled, rupturing irregularly.

Etymology: —The generic epithet derives from the Arabic wadi (a seasonally wet valley or ravine) and the Greek thamnos (a shrub).

Distribution: —A monotypic genus from S-Arabia.

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