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FOC | Family List | FOC Vol. 17 | Lamiaceae | Stachys

17. Stachys kouyangensis (Vaniot) Dunn, Notes Roy. Bot. Gard. Edinburgh. 8: 167. 1913.

西南水苏 xi nan shui su

Herbs perennial, rhizomatous. Stems slender, flexuous, base prostrate, ca. 50 cm, angles and nodes hispid. Petiole ca. 1.5 cm; leaf blade triangular-cordate to hastate-triangular, ca. 3 × 2.5 cm, base cordate to truncate, margin crenate, apex obtuse. Spikes lax; verticillasters 5- or 6-flowered, widely spaced; upper floral leaves subsessile, ovate-triangular, remotely crenate, shorter than calyx tube; bracteoles ca. 1 mm, early deciduous. Pedicel less than 1 mm. Calyx obconical, ca. 6 mm, minutely hispid, conspicuously 10-veined; teeth ca. 2 × 2 mm, apical spine ca. 1 mm. Corolla reddish to purple red, ca. 1.5 cm; tube ca. 1.1 cm, puberulent, saccate; upper lip erect, oblong-ovate, ca. 4 × 3 mm; lower lip spreading, ca. 6 × 6 mm; middle lobe circular, ca. 3.5 mm in diam.; lateral lobes ovate, ca. 1.5 mm wide. Nutlets ovoid to obovoid, 1.5-3 mm in diam., brownish, smooth to tuberculate. Fl. Jul-Aug, fr. Sep, sometimes fl. and fr. Nov.

* Thickets, mixed forests, grassy slopes, open areas, field margins, moist streamsides; 900-3800 m. Guizhou, Hubei, Sichuan, Xizang, Yunnan.

1 Calyx teeth linear to lanceolate, subpatent to reflexed.   (2)
+ Calyx teeth triangular, straight.   (3)
2 (1) Calyx teeth subpatent; leaves hastate- triangular, base subtruncate, margin coarsely crenate   17e var. franchetiana
+ Calyx teeth reflexed; leaves triangular-cordate, base cordate, margin crenate   17c var. leptodon
3 (1) Young parts of plant densely silky-puberulent, especially calyx and abaxial surface of leaves   17d var. villosissima
+ Young parts of stems and abaxial surface of leaves hispid; calyx minutely hispid. 4a Nutlets obovoid, 2.5-3 mm, tuberculate   17b var. tuberculata
+ Nutlets ovoid, ca. 1.5 mm, smooth   17a var. kouyangensis

Lower Taxa


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Photos by The Biodiversity of the Hengduan Mountains Project  
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