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FOC | Family List | FOC Vol. 18 | Scrophulariaceae

21. Mimulus Linnaeus, Sp. Pl. 2: 634. 1753.

沟酸浆属 gou suan jiang shu

Herbs, annual or perennial, erect, diffusely prostrate, or creeping, glabrous or glandular hairy, sometimes viscid. Stems simple or branched, terete or quadrangular and winged. Leaves opposite, margin entire to toothed. Flowers axillary and solitary or in terminal racemes. Bracteoles present or absent. Calyx tubular to campanulate, often inflated in fruit, glabrous to villous, 5-ribbed, with veins sometimes narrowly winged, 5-lobed; lobes short, regular or irregular. Corolla 2-lipped; tube cylindric, longer than calyx, palate with 2 bulging plaits; lower lip 3-lobed, lobes often spreading flat; upper lip 2-lobed, lobes erect or reflexed. Stamens 4, didynamous, inserted on corolla tube, included. Stigma 2-lamellate. Capsule compressed, loculicidal. Seeds numerous, ovoid to oblong, minute; seed coat smooth or reticulate.

About 150 species: worldwide; five species in China.

1 Flowers with 2 linear bracteoles   1 Mimulus bracteosus
+ Flowers without bracteoles.   (2)
2 (1) Plants 4-25 cm; stems prostrate or decumbent; upper leaves sessile and amplexicaul; pedicel often longer than leaves   2 Mimulus bodinieri
+ Plants usually taller than 25 cm; stems erect or diffuse; upper leaf bases truncate, cuneate, or subrounded; pedicel often shorter than leaves.   (3)
3 (2) Leaves orbicular, margin double serrate   3 Mimulus tibeticus
+ Leaves ovate, ovate-triangular, or ovate-oblong, margin not double serrate.   (4)
4 (3) Leaf base cuneate; calyx 1-1.5 cm; seeds reticulate   4 Mimulus szechuanensis
+ Leaf base truncate; calyx ca. 0.5 cm; seeds papillose   5 Mimulus tenellus

Lower Taxa


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