Urostachys jergii Nessel, Repert., 2020

Øllgaard, Benjamin, Boudrie, Michel & Cremers, Georges, 2020, The Lycopodiaceae of Guyana, Suriname, and French Guiana, Phytotaxa 433 (2), pp. 101-134 : 123

11. Phlegmariurus reflexus (Lam.) B.Øllg., Rodriguésia 63(2): 481. 2012. — Lycopodium reflexum Lam., Encycl. Méthodique Bot. 3: 653. 1789.— Plananthus reflexus (Lam.) P.Beauv., Prodr. Aeth. 100. 1805.— Urostachys reflexus (Lam.) Herter, Beih. Bot. Centralbl. 39: 249. 1922.— Huperzia reflexa (Lam.) Trevis., Atti Soc. Ital. Sci. Nat. 17: 248. 1874.—Type: MARTINIQUE: “ Communiqué par Joseph Martin ” [cf. Lamarck 1789: 653], s.n. (holotype P-LA! [P00565085]). Fig. 9B .

Lycopodium bifidum Willd., Sp. Pl. ed. 4. 5: 53. 1810.— Lycopodium reflexum Lam. var. majus Spring, Mém. Acad. roy. Belg. 15 [Mon. Lyc. 1]: 26. 1842.— Huperzia reflexa (Lam.) Trevis. var. bifida (Willd.) Trevis., Atti Soc. Ital. Sci. Nat. 17: 248. 1874.— Urostachys bifidus (Willd.) Nessel, Bärlappgewächse 110. 1939.— Huperzia bifida (Willd.) Holub, Folia Geobot. Phytotax. 20: 71. 1985. Type:— VENEZUELA. Cuchilla de Guajana Guajana, Humboldt & Bonpland 474 (holotype B [B-W 19421 -01 0]; isotype P [P00559281].).

Lycopodium reversum C.Presl, Rel. Haenkeana 1: 82. 1825.— Urostachys reversus (C.Presl) Herter, Index Lyc. 78. 1949.—Type: ECUADOR: Guayaquil, Haenke s.n. (holotype PRC).

Lycopodium reflexum Lam. var. densifolium Baker, Handb. Fern-Allies 11. 1887.— Lycopodium densifolium (Baker) Underw. & F.E.Lloyd, Bull. Torrey Bot. Club 33: 106. 1906.— Urostachys reflexus (Lam.) Herter var. densifolius (Baker) Nessel & Hoehne, Arch. Bot. Est. S. Paulo 1: 394. 1927.— Urostachys densifolius (Underw. & F.E.Lloyd) Herter, Index Lyc. 58. 1949. Syntypes:— COLOMBIA: 1843, Hartweg 1480 (K!,G, B); Popayan, Moritz 2266 (K!; B, BM; annotated with”226b”: HBG, K); BRAZIL. Minas Gerais: Upper Itacolumy, 25 June 1884, Glaziou 15797 (K, P).

Urostachys jergii Nessel, Repert. Spec. Nov. Regni Veg. 39: 70, t. 194. 1935.— Type : PUERTO RICO. Sintenis 6345 (holotype BONN [Herb. Nessel 229]; isotype NY).

Lycopodium mexiae Copel., Univ. California Publ. Bot. 19: 294, pl. 47. 1941.— Huperzia mexiae (Copel.) Rolleri & Deferrari, Notas Mus. La Plata, Bot. 21 (100): 156. 1988. Type: PERU. Huánuco: Churubamba, trail Cotirarda–Mercedes, 1875 m, Mexia 8193 a (holotype UC! [UC600269]; isotypes F!, GH [GH00056284], K!, MICH [MICH1287169]).

Urostachys stellae-polaris Herter, Revista Sudamer. Bot. 10: 121. 1953.— Lycopodium stellae-polaris (Herter) C.V.Morton, Amer. Fern J. 54: 72. 1964.— Type: COLOMBIA. Cundinamarca: Guayabetal to Monte Redondo , SE of Quetame, 1300–1500 m, Pennell 1801 (holotype US [00135616]; isotypes GH, NY).

Plants terrestrial, erect or ascending from a decumbent base, soft, usually forming small loose clumps, 10–30(–40) cm tall. Shoots homophyllous, almost equally thick throughout, 7–15 mm in diam. incl. leaves. Stems excl. leaves 1.5–3(–4) mm thick at base, sometimes tapering to 1–1.5 mm in diam., ridged by decurrent leaves or almost smooth, sporangiate from 2–12 cm above the base and upward, usually 2–5 times dichotomous. Leaves borne in alternating, often irregular and oblique, whorls of (6–)7–8(–9), these 0.7–2.5 mm apart, forming 12–18 longitudinal ranks, ascending to spreading or sharply reflexed, straight to strongly recurved, linear-subulate, widest just above the base, 4–8 × 0.5–1(–1.2) mm, softly herbaceous to subcoriaceous, adaxially convex, or concave near the base, abaxially flat, or slightly concave to convex, with obscure to somewhat prominent vein, with flat to revolute, very sparsely to densely denticulate to shortciliolate margins. Leaf bases often somewhat decurrent. Sporangia 1–1.5 mm in diam.

Distribution:—Throughout humid mountainous regions of tropical America, south to Argentina.

Habitat:—Terrestrial on land slides, road banks, and other open or disturbed habitats in montane forest, 900–3400 m elev.

Specimens examined:— GUYANA: Schomburgk 1192A (HBG); Schomburgk 1193 (P).

Figures

FIGURE 9. A. Phlegmariurus intermedius—(Brazil, Harley et al. 22599,AAU).A. Growth habit.A1. Close-up of sporangiate division.— B. Phlegmariurus reflexus—(Brazil, Irwin et al. 29233, P). B. Growth habit. B1. Close-up of sporangiate division. Drawing by. K. Tind.