86 SPECIES PLANTARUM — FLORA OF THE WORLD (2002) Northern regions of Siberia and the Russian Far East, Kamchatka, Alaska and NW Canada. 30: KRA, YAK. 31: KAM, KHA, KUR, MAG. 70: ALU, ASK, NWT, YUK. 71: BRC. In drier tundra, and on rocky slopes. Map 7<strong>6.</strong> 30: KRASNOYARSK: Taymyr, Syndasko R., N.S.Vodop’yanova 412 (PRA). YAKUTIYA [SAKHA]: Bulkur, 1898, H.Nilsson s.n. (LD); Balganach, 1898, H.Nilsson s.n. (LD). 31: MAGADAN: Chukotka, 15 km SSW of Provideniya, 23 Jun 1992, A.Svensson (S). 70: ALEUTIAN IS.: Akutan, Norberg 71 (S); Amlia Is., W.J.Eyerdam 1234 (BM). ALASKA: Alaska Range Distr., Dry Ck, c. 1100 m, A.Viereck & Jones 5772 (S); Pribilof Is., St. Paul, E.Hultén 7459 (S); Brooks Range, De Long Mtns, Libera<strong>to</strong>r Lake, K.Holmen & O.Mårtensson 61-1640 (UPS); Port Clarence, Teller Reindeer Station, B.A.Walpole 1963 (K). NORTHWEST TERRITORIES [Nunavut]: Mackenzie R. Delta, Kittigaznit Is., A.E.Porsild & R.T.Porsild 2333 (S); Tungsten, Marris 11225 (BM). The accepted name has often been misinterpreted for plants of the sect. <strong>Luzula</strong>. For discussion, see L.Hämet-Ahti & Virrankoski, Ann. Bot. Fenn. 8: 157–158 (1971). 47. <strong>Luzula</strong> arcuata (Wahlenb.) Sw., Summa Veg. Scand. 13 (1814) Juncus arcuatus Wahlenb., Fl. Lapp., p. 87, tab. 4, 1812, nom. conserv. propos. [nom. illeg., Juncus pediformis Chaix in syn.]; Juncoides arcuata (Wahlenb.) Druce, Bot. Soc. Exch. Club Brit. Isles 8: 85 (1929). T: Sweden, Piteå Lappmark på Örfjället, 6 Sep 1807, G.Wahlenberg; lec<strong>to</strong>: UPS, fide Moberg & Nilsson, Nord. J. Bot. 11: 293 (1991). [further authentic material: S, UPS, WU]. Map: E.Hultén & M.Fries, Atlas N. Eur. Vasc. Pl. 1: map 168 (1986). Perennials, sparsely hairy, with ascending rhizomes and short s<strong>to</strong>lons. Leaves subabruptly narrowing <strong>to</strong> acute tip. Basal leaves usually up <strong>to</strong> 4 mm wide. Stem usually 0.3–0.5 mm in diam. Lower bract membranous-brownish, usually 3–8 (–15) mm long. Inflorescence corymbose, composed of 3–17 few-flowered glomerules usually as long as wide or wider; peduncles with secondary branches, capillary, usually c. 0.2 mm in diam., arcuate or nodding. Stamens <strong>6.</strong> Seeds narrowly ellipsoidal; appendage absent or up <strong>to</strong> 0.15 mm long; base fibrillate. Arctic regions of Europe; the Arctic and mountains of N Asia; N America from Washing<strong>to</strong>n and British Columbia northwards; Japan, Korea and, probably, China. Rocky or gravelly places. Two subspecies are recognized. Basal leaves up <strong>to</strong> 2 mm wide; seed appendage lacking Basal leaves more than 3 mm wide; seed appendage developed, 47a. subsp. arcuata <strong>to</strong> 0.15 mm long 47b. subsp. unalaschkensis 47a. <strong>Luzula</strong> arcuata (Wahlenb.) Sw. subsp. arcuata <strong>Luzula</strong> arcuata f. capillaris Laest., Bot. Not. 1858: 144 (1858). T: Sweden, Pite Lappmark, "Njepusurte i Piteå Lappmark", L.L.Laestadius; syn: n.v.; [Norway, Finnmark] Kou<strong>to</strong>keino, L.L.Laestadius; syn: n.v. Illustration: J.Lid, Norsk & Svensk Fl. 203, fig. 100a (1963). Perennials up <strong>to</strong> 15 cm long, sparsely hairy <strong>to</strong> glabrescent, loosely caespi<strong>to</strong>se, with branched creeping or ascending thin rhizome and ascending s<strong>to</strong>lons. Basal leaves canaliculate, up <strong>to</strong> 5–7 cm long, up <strong>to</strong> 1.5–2.0 mm wide, subabruptly narrowing <strong>to</strong> acute tip; plant base brownish <strong>to</strong> purplish, slightly lustrous; cauline leaves 1 (–2), usually 1.5–2.0 (–3.0) cm long, <strong>to</strong> 1.2 mm wide; stem thin, usually less than 0.5 mm in diam. below inflorescence. Lower bract membranous, often suffused brownish, 3–5 mm long, ciliate above. Inflorescence lax, corymbose, composed of (3–) 5–15 small glomerules; peduncles smooth, thin, c. 0.2 mm long, arcuate and nodding, up <strong>to</strong> 1.5–2 cm long, often branched (secondary branches usually 1–3); glomerules c. 4 × 3.5–6 mm, usually (1–) 2–5 (–8)-flowered, often with some flowers with visible peduncles. Bracteoles 1.0–1.2 mm long, ovate, brownish below, scarious and fimbriateciliolate above. Tepals ±equal; outer tepals acuminate; inner tepals ±mucronate or acute, deep brown, usually 2.0–2.2 mm long. Stamens 6; anthers 0.4–0.6 mm long; filaments c. 0.3 mm long; style 0.4–0.5 mm long; stigma 1.1–1.3 mm long. Capsule ovoid <strong>to</strong> ellipsoidal, slightly
<strong>JUNCACEAE</strong> (<strong>Luzula</strong>) Figure 20. <strong>Luzula</strong> arcuata subsp. arcuata. A, habit; B, flower glomerule; C, flower; D, tepal and stamen; E, seeds. <strong>Luzula</strong> kjellmaniana. F, habit; G, inflorescence; H, flower; I, tepal and stamen; J, leaf apex; K, seed. (A–J, J.Montell s.n., PR; F–K, A.E.Porsild & R.T.Porsild 2333, S; E.Hultén 7459, S). Scale bars: A = 5 cm; B = 4 mm; C, H = 1 mm; D, I = 1 mm; E, K = 0.5 mm; F = 5 cm; G = 1 cm; J = 4 mm. Drawn by © E.Smrčinová. 87
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