| 1 |
Teeth of fruiting calyx plumose and up to c. 6 mm long; corollas soon deciduous; tall sturdy shrub |
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53 Colebrookea |
| + |
Teeth of fruiting calyx not plumose and less than 5 mm long; corollas soon deciduous or not; annual to perennial herbs, subshrubs or shrubs |
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(2) |
| |
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| 2 (1) |
Leaves borne in whorls of 3-5 |
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52 Pogostemon |
| + |
Leaves in opposite pairs, sometimes with younger leaves in leaf arils |
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(3) |
| |
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| 3 (2) |
Upper lip of corolla almost absent; flowers secund in ± elongated cymes |
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32 Craniotome |
| + |
Upper lip of corolla present; flowers not or scarcely secund in condensed vertical-lasters or loose cymes |
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(4) |
| |
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| 4 (3) |
Calyx at flowering time clearly differentiated into an upper and lower lip |
|
(5) |
| + |
Calyx at flowering time not or scarcely differentiated into an upper and lower lip |
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(10) |
| |
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|
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| 5 (4) |
All verticillasters borne in cools of the middle and upper leaves |
|
48 Mentha |
| + |
Only the lowermost or none of the verticillasters borne in upper leaf mils |
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(6) |
| |
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|
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| 6 (5) |
Leaves sessile [Karachi only] |
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58 Geniosporum |
| + |
Leaves shortly or clearly petiolate [all areas] |
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(7) |
| |
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| 7 (6) |
All flowers in congested oblong or ovoid heads |
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57 Acrocephalus |
| + |
Flowers in ± clearly separated verticillasters |
|
(8) |
| |
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| 8 (7) |
Flowers in 2-flowered verticillasters; nutlets with a prominent raised reticulum |
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50 Mosla |
| + |
Verticillasters more than 2-flowered; nutlets without a prominent raised reticulum |
|
(9) |
| |
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| 9 (8) |
Upper lobe of calyx 1, large, entire, with decurrent margins; lower lobe of calyx with 4 teeth; stamens 4. |
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59 Ocimum |
| + |
Upper lobe of calyx shortly 3- toothed, not decurrent; lower lobe of calyx with 2 teeth; stamens 2. |
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33 Salvia |
| |
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| 10 (4) |
Leaf margins entire; leaves densely gland-dotted on both surfaces |
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46 Zataria |
| + |
Leaf margins not entire; leaves not densely gland-dotted or not gland dotted |
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(11) |
| |
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| 11 (10) |
All verticillasters borne in the axils of the middle and upper leaves; plants of wet places |
|
(12) |
| + |
Only lowermost or none of the verticillasters borne in axils of upper leaves |
|
(13) |
| |
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| 12 (11) |
Aromatic plants; corolla 4-lobed; flowers often 1-sexed |
|
48 Mentha |
| + |
Not aromatic plants; corolla 5- lobed; flowers hermaphrodite |
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47 Lycopus |
| |
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| 13 (11) |
Flowers borne in condensed oblong to cylindrical spikes; nutlets smooth to finely tuberculate |
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51 Elsholtzia |
| + |
Inflorescence of terminal and lateral loose racemes; verticillasters 2-flowered; nutlets with a raised reticulum |
|
49 Perilla |
