Premna Ngumbau & Musili & Hu 2021
Creators: name: Ngumbau, Veronicah Mutele
name: Musili, Paul Mutuku
name: Hu, Guang-Wan
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Premna

description: Key to Kenyan species of Premna.
1. Moist forest trees up to 30 m tall........................................................................................................................................................2
- Dryland and coastal shrubs or climbers often less than 10 m tall ......................................................................................................3
2. Leaves glabrous, 4 whorled............................................................................................................................................. P. angolensis
- Leaves pubescent or at least on the midrib beneath, opposite or 3 whorled ....................................................................... P. maxima
3. Leaves glabrous or nearly so ..............................................................................................................................................................4
- Leaves always hairy ...........................................................................................................................................................................8
4. Leaves smaller up to 80 × 40 mm ......................................................................................................................................................5
- Leaves lager, up to 150 × 120 mm .....................................................................................................................................................7
5. Inflorescence very delicate and few flowered, often appearing lateral ........................................................................... P. gracillima
- Inflorescence coarser, more obviously terminal.................................................................................................................................6
6. Inflorescence generally smaller to shorter up to 55 mm long, leaves drying ± blackish ............................................... P. oligotricha
- Inflorescence usually longer up to 85 mm long, leaves not drying blackish ..................................................................... P. resinosa
7. Shrubs or trees, leaves not markedly discolorous .......................................................................................................... P. serratifolia
- Climbers or scandent shrubs, leaves distinctively discolorous ........................................................................................... P. discolor
8. Leaves with stellate hairs, inflorescence dense ..................................................................................................................................9
- Leaves with simple hairs,inflorescence lax ......................................................................................................................................10
9. Shrubs or small trees up to 6 m tall, older stems ridged or thinly corky...................................................................... P. chrysoclada
- Scandent shrubs or more often lianas up to 10 m long, older stems with persisting thorns not ridged or corky............ P. mwadimei
10. Leaves with petioles usually longer up to 50 mm long............................................................................................... P. hildebrandtii
- Leaves with petioles less than 35 mm long......................................................................................................................................11
11. Petioles short, 4–10 mm long, leaves discolorous very short acuminate. Inflorescence up to 40 mm long ....................... P. velutina
- Petioles longer up to 35 mm long, leaves not discolorous, distinctively long acuminate. Inflorescence often less than 10 mm long ............................................................................................................................................................................................ P. senensis
description: Published as part of Ngumbau, Veronicah Mutele, Musili, Paul Mutuku & Hu, Guang-Wan, 2021, Premna mwadimei (Lamiaceae), a new species from Cha Simba, a remnant of coastal forests of Kenya, East Africa, pp. 155-162 in Phytotaxa 510 (2) on page 161, DOI: 10.11646/phytotaxa.510.2.4, http://zenodo.org/record/5426322