Boehmeria sieboldiana var. fuzhouensis

Wilmot-Dear, C. M. & Friis, I., 2013, The Old World species of Boehmeria (Urticaceae, tribus Boehmerieae). A taxonomic revision, Blumea 58 (2), pp. 85-216 : 185-186

1. Leaves very narrowly elliptic-ovate, length 4–4.5 × width, most marginal teeth only 0.5–1 mm long, up to 25 either side; fruiting perianth rounded at base, rhomboid or subspherical, not or scarcely laterally flattened and without rim. — South-eastern China................... b. var. fuzhouensis a. var. sieboldiana — Fig. 33a–l ; Map 34

Boehmeria platyphylla D.Don var. stricta C.H.Wright (1899) 487. ― Boehmeria formosana Hayata var. stricta (C.H.Wright) C.J.Chen in Chen et al. (2003) 171. ― Syntypes: Oldham 521 (K), Taiwan; Wilford 547 (K), Taiwan ; Henry 187 (K; isosyn NY) & 1293 (K), China ; Ford 107 (K), China, Guangdong .

Boehmeria formosana Hayata (1911) 281. ― Syntypes: Kawakami & Kobayashi 1472b (TI), Taiwan, Taito, May 1906; Nakahara 68 (not traced), no loc., June 1905.

Boehmeria taquetii Nakai (1914) 267. ― Type: Taquet 5965 (holo TI), South Korea, Quelpart Island, Aug. 1911.

Boehmeria pseudo­sieboldiana Honda (1931) 469. ― Type: K. Mayebara 318 (holo TI), Japan, Kiusiu, Higo Prov. , Omura, 12 Aug. 1929.

Boehmeria nakaiana Satake (1936) 491;Satake in Nakai (1936) 145. ― Type: Nakai 6156 (holo TI), South Korea, Quelpart Island, 31 Oct. 1917.

Boehmeria hirtella Satake (1936) 493; Satake in Nakai (1936) 145. ― Type: Taquet 4433 (holo TI), South Korea, Quelpart Island, 16 Aug. 1910.

Boehmeria stenostachya Satake (1938a) 202. ― Type: Hatusima s.n. (holo TI), Japan, Kyusyu , Hizen Prov., Mt Kurokamiyama, 6 Sept. 1936.

Boehmeria sieboldiana Blume var. sikokiana Satake (1938b) 263, syn. nov. ― Type: Koidzumi s.n. (holo TI), Japan, Sikoku, Iyo, 6 July 1915. – See Note 4.

Leaves narrowly ovate, ovate-attenuate or rhombic-ovate, (8–) 10–20 by 3.5–10 cm, length 2–3 × width, margin with 15– 30 (–40) large teeth either side, 2–5(–10) by 5–9(–15) mm. Fruiting perianth broadly ovoid to obovoid tapering to base, sometimes with indistinct pedicel, 1.2–2.5 by 0.7–1.5 mm, length 1.3–1.5(–1.8) × width, only moderately laterally flattened but with distinct marginal rim or ± winged, glabrous or sparsely adpressed-hairy.

Distribution ― Throughout the range of the species.

Habitat & Ecology ― Dense forest on Eocene limestone, littoral forest, secondary forest, thickets, margins of cultivation, often in partial sun in moist soil by streams or on coral; 10– 1400 m altitude.

Notes ― 1. Distinguished from var. fuzhouensis by its leaves always clearly ovate with length usually only up to 3 × width, marginal teeth usually longer, fruiting perianth always somewhat flattened with tapering base.

2. One collection of uncertain identity from the Philippines ( Luzon , Apayao, May 1917, Fenix BS 28030, BO) is possibly referable to this taxon which has not been recorded so far to the south-east, but might possibly occur there .

3. Ying (1988) contains a photograph (no. 561) labelled as B. formosana but clearly not of B. sieboldiana (almost certainly of B. pilosiuscula ); however, the figure on p. 465 labelled B. formosana is indeed B. sieboldiana . Yang et al. (1996: photo no. 78, 80 on p. 785) illustrate both these taxa.

4. The material described as var. sikokiana has small but unusually wide leaves but is not otherwise distinct, and the name is therefore reduced to synonymy here.

5. For discussion of similarity to B. japonica and B. holosericea , and possible hybrid material, see Notes 3 – 5 under the species as a whole.

Figures

Map 34 Distribution of Boehmeria sieboldiana Blume var. sieboldiana (●) and B. sieboldiana Blume var. fuzhouensis (W.T.Wang) Friis & Wilmot-Dear (Ê).

Fig. 33 a–l: Boehmeria sieboldiana Blume var. sieboldiana. a. Habit of stem with inflorescence-bearing axes; b. large leaf from basal part of stem; c. small leaf from upper part of stem (same plant); d, e. leaves from different plants; f. leaf, detail of adaxial surface; g. leaf, detail of abaxial surface; h. detail of stem and stipule; i. detail of male inflorescence-bearing axis with two flower-clusters (inflorescences); j. male bud; k. detail of female inflorescence-bearing axis with three flower-clusters (inflorescences); l. fruiting perianth. — m, n: Boehmeria sieboldiana var. fuzhouensis (W.T.Wang) Friis & Wilmot-Dear. m. Leaf; n. fruiting perianth (a–c, f–h: Furuse 45347; d: Wilford 547; e: Mizushima 939; i–k: Furuse 3790; l: Fosberg 37912; m, n: Chung 2798; all K). — Scale bars: a–e, m = 2 cm; f -i, k = 2 mm; j, l, n = 1 mm.