What’s a dichotomous key? Help

Mimulus

Beardsley and Olmstead (2002) showed that the genus Mimulus is not monophyletic. Mimulus brevipes and M. guttatus (and perhaps M. moschatus, not sampled in their work) need to be removed from Mimulus to create a monophyletic naming system.

See list of 2 species in 1a
CHOOSE THIS LEAD
1a. Corolla largely blue, lacking hairs on the palate of the lower lip
- Choose this species
  M. ringens
  2a. Leaves sessile; pedicels 20–45 (–60) mm long; calyx lobes 1.5–8 mm long
- Choose this species
  M. alatus
  2b. Leaves borne on petioles 10–20 mm long [Fig. 763]; pedicels 2–10 (–15) mm long   [Fig. 763]; calyx lobes 1–1.5 mm long
See list of 3 species in 1b
CHOOSE THIS LEAD
1b. Corolla largely yellow, pubescent on palate of the lower lip
- Choose this species
  M. brevipes
  3a. Pedicels 2–10 mm long; ovary with parietal placentation; plants annual
- See list of 2 species in 3b
  CHOOSE THIS LEAD
  3b. Pedicels 10–80 mm long; ovary with axile placentation; plants perennial (rarely annual in M. guttatus)
  - Choose this species
    M. moschatus
    4a. Calyx lobes narrow-triangular, longer than wide, subequal; corolla (14–) 17–22 mm long; stems viscid-villous; leaf blades oblong to ovate, pinnately veined
  - Choose this species
    M. guttatus
    4b. Calyx lobes broad-triangular, as wide as or wider than long, not equal, the upper one distinctly larger; corolla 25–45 mm long; stems glabrous or pubescent, but not viscid-villous; leaf blades ovate to subrotund, ± palmately veined

Show All Couplets

Show photos of: Each photo represents one species in this genus.