SPECIES PLANTARUM —FLORA OF THE WORLD 2005 Figure 2. A–C, Houttuynia cordata Thunb. A, plant; B, inflorescence; C, flower. D–F, Gymnotheca chinensis Decne. D, plant; E, inflorescence portion; F, longitudinal section of flower showing ovules. Scale bars: A, B, D = 2 cm; C, E, F = 2 mm. Drawn by Huang Shaorong. Reproduced from Z.Y.Wu, & P.H.Raven (eds.), Fl. China, Illustr. 4: 122 (2001), with permission from Missouri Botanical Garden Press. 8
SAURURACEAE (Houttuynia) Houttuynia cordata f. viridis J.Ohara, J. Phytogeogr. Taxon. 33(2): 72 (1985). T: [Japan] Hondo: Owhatacho, Okazaki-shi, prov. Mikawa, 18 Jun. 1983, Sumio Honda; holo: AICH, n.v. Houttuynia cordata f. polypetaloidea T.Yamaz., J. Jap. Bot. 61(1): 310 (1986). T: [Japan] Koishikawa, Bot. Gard. cult., 30 Jun. 1986, T.Yamazaki; holo: TI, n.v. Polypara cochinchinensis Lour., Fl. Cochinch. 34, 61 (1790). T: [Vietnam], J. de Loureiro; holo: P, n.v. Illustrations: T.Yamazaki, Bot. Mag. (Tokyo) 91: 69–82 (1978); K.M.Liu & H.C.Wang, Fl. Taiwan 2: 621 (1996); Z.Y.Wu & P.H.Raven (eds.), Fl. China, Illustr. 4: 122 (2001). Maps: C.Y.Wu, Acta Phytotax. Sin. 6: 189, fig. 9 (1957); L.K.Fu & T.Hong (eds.), Higher Pl. China 3: 317 (1999). Herbs, (5–) 30–60 cm high; rhizomes creeping, thin. Leaves: stipular sheath (0.5–) 1–2.5 cm long, 1 /4– 1 /2 as long as petiole, usually ciliate, enlarged and slightly clasping at base; petiole (0.7–) 1–3.5 (–4) cm long, glabrous; lamina broadly ovate or ovate-cordate, (1.5–) 4–10 × (1.8–) 2.5–6 cm, cordate at base, short acuminate at apex, thinly papery, densely glandular, usually glabrous, sometimes pubescent at nerve axils, usually purplish abaxially. Inflorescences (0.4–) 1.5–2.5 (–2.7) × (2–) 5–6 mm; peduncles 1.5–3 cm long, subglabrous; involucral bracts oblong or obovate, (5–) 10–15 × (3–) 5–7 mm, rounded at apex. Bract beneath each flower linear, terete, inconspicuous. Stamens longer than ovary. Capsule 2–3 mm long, with persistent styles. 2n = 96, fide H.Okada, Bot. Mag. (Tokyo) 99: 289–299 (1986). Fig. 2A–C. West Indian Ocean, Madagascar, Indian Subcontinent, China, Eastern Asia, Indo-China, Malesia. 29: MDG. 36: CHC, CHT. 38: JAP, KOR, NNS, TAI. 40: ASS, BAN, BHU, IND, NEP. 41: BMA, CBD, THA. 42. JAW, SUM. Ravines, streamsides, forests, wet meadows, slopes, thicket and field margins, trailsides, roadsides, ditch banks. Flowering Apr.–Sep., fruiting Jun.–Oct. Map 6. 29. MADAGASCAR: Madagascar, L.J.Dorr 2816 (MO). 36. CHINA NORTH-CENTRAL: Wenxian, Gansu, J.X.Yang 3704 (IBSC). CHINA SOUTHEAST: Hua'an, Fujian, K.M.Wu 60118 (IBSC); Wahshan Kuek, N.T., Hong Kong, S.Y.Hu 10868 (A); Iu Village, Guangdong, To & Ts'ang 12077 (MO); Shap Man, Taai Shan, Guangxi, W.T.Tsang 22699 (BM, A); Zhengkou, Jiangsu, C.P'ei 3215 (IBSC). CHINA SOUTH-CENTRAL: Emei [Omei] Shan, Sichuan, W.P.Fang 14373 (IBSC); Chungtien [Zhongdian] Plateau, Yunnan, G.Forrest 12618 (E, BM). 38. TAIWAN: Ilan Hsien, C.C.Liao & D.S.Hsu 313 (A). In China, India, Nepal, Thailand and Vietnam, the leaves are used medicinally, and the shoots are eaten as a vegetable (E.F.Anderson, Econ. Bot. 40(4): 442–450, 1986; K.R.Kuebel & A.O.Tucker, Econ. Bot. 42(3): 413–419, 1998; A.K.Gangwar & P.S.Ramakrishnan, Econ. Bot. 44(1): 94–105, 1990; N.P.Manandhar, Econ. Bot. 49(4): 371–379, 1995). Forms with variegated leaves and double flowers are grown as ornamentals in gardens in Europe and the U.S. 9