Flora Zambesiaca
Keys
Back to SearchKey to Premna
| 1 | a | Branches and leaves with stellate or dendritically branched hairs; inflorescences terminal and axillary go to 2 |
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| b | – Branches and/or leaves glabrous or with simple or multicellular hairs, not stellate or branched; inflorescences terminal go to 3 |
| 2 | a | Leaves elliptic to oblanceolate, 3–7.5(10) × l–3.5(4) cm, sharply acuminate at the apex; inflorescences of dense ovoid clusters, 1–2 × 1.5 cm, mostly on short lateral shoots; calyx tubular with distinct triangular teeth c. 1 mm long FZ account for Premna tanganyikensis |
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| b | – Leaves relatively broader, 2.8–14(25) × 2.3–9(14) cm, rounded or shortly acuminate at the apex; inflorescences paniculate, up to 3.5(7) × 5(16) cm; calyx cup-shaped, with short or obsolete teeth FZ account for Premna schliebenii |
| 3 | a | Inflorescence, calyx and drupe with gland-tipped hairs; inflorescences few-flowered, racemiform; calyx lobes (1.5)2–2.5 mm long, oblong; leaves up to 4 × 2.5 cm (usually smaller) FZ account for Premna mooiensis forma glandulifera |
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| b | – Inflorescence, calyx and drupe without gland-tipped hairs; inflorescences many-flowered, corymbiform; calyx lobes shorter; leaves usually larger go to 4 |
| 4 | a | Petiole up to 6 cm long, usually more than 1/3 as long as the leaf blade, slender; leaves usually ± long acuminate, thin and softly membranous, drying light to pale green; corolla (3.5)5–6 mm long (total length) FZ account for Premna senensis |
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| b | – Petiole up to 3.5 cm long, usually less than 1/3 as long as the leaf blade; leaves not acuminate or shortly acuminate, thicker and more rigid, drying dark green at least above; corolla usually smaller go to 5 |
| 5 | a | Leaf blades up to 8.5 × 5.7 cm, discolorous, dark green above, golden-yellow-brown velvety beneath; petiole 0.2–1.2(2) cm long, usually less than 1/4 as long as the leaf blade; corymbs small, up to 3.5 × 4.3 cm FZ account for Premna velutina |
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| b | – Leaf blades usually larger, concolorous, dark green on both surfaces; petiole up to 3.5 cm long; corymbs usually larger go to 6 |
| 6 | a | Leaf blades up to 15(17) × 9(14) cm, usually glabrous above with some hairs on the main nerves and in lower nerve axils beneath and at base of the midrib; petiole up to 3 cm long, less than 1/3 as long as the leaf blade FZ account for Premna serratifolia |
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| b | – Leaf blades smaller, evenly and ± sparsely hairy on both surfaces; petiole up to 3.5 cm long, 1/3 as long as the leaf blade or slightly longer FZ account for Premna sp. |
