Coleus species

Key to Coleus species in Sri Lanka

1 Spikes subtetragonal or cylindrical; verticils densely imbricate; Flowers small ...............................................................................2

- Spikes, racemes or cymose terminal panicles with distant verticils: Flowers comparatively large...................................................4

2 Stem reaches about 60 cm high; spikes length exceeds 1.5 cm; annual.......................................................................... C. strobilifer View in CoL

- Stem grows exceeding 60 cm; spikes up to 1.5 cm; perennials .........................................................................................................3

3 Leaves broadly oval to suborbicular, base rounded, scaberulous beneath .................................................................... C. divaricatus View in CoL

- Leaves oval to oval-oblong, base slightly cuneate, velvety-tomentose beneath ............................................................... C. velutinus View in CoL

4 A ring of hairs at the inside of calyx throat: Mature stem densely hirsute........................................................................ C. barbatus View in CoL

- Calyx throat, otherwise, Mature stem glabrous, puberulous or hirsutulous.......................................................................................5

5 Stem acutely 4-angular; Leaves membranous....................................................................................................................................6

- Stem obtusely 4-angular: Leaves thick.............................................................................................................................................10

6 Stem uniformly thickened; verticils secund .................................................................................................................... C. elongatus View in CoL

- Stem tumid above nodes, verticils annular.........................................................................................................................................7

7 Peduncles densely hirsutulous; floral leaves persistent........................................................................................................ C. mollis View in CoL

- Peduncles glabrous, puberulous or sparsely hirsutulous; Floral leaves deciduous ............................................................................8

8 Corolla tube faintly sigmoid; lower lip laterally compressed ........................................................................................... C. inflatus View in CoL - Corolla tube clearly sigmoid; lower lip navicular ..............................................................................................................................9

9 Inflorescence axis ending in a cymelet; Peduncles glabrous or puberulous ............................................................... C. malabaricus View in CoL

- Inflorescence axis ending in an aborted bud or flower; peduncles densely hirtellous .............................................. C. kanneliyensis View in CoL

10 Leaves rounded to truncate at base; Calyx upper lip broadly ovate, abruptly acute ........................................................ C. hadiensis View in CoL

- Leaves cordate at base; Calyx upper lip orbicular....................................................................................................... C. hakgalensis