Urostachys guatemalensis (Maxon) Herter, Repert., 2020

Øllgaard, Benjamin, Boudrie, Michel & Cremers, Georges, 2020, The Lycopodiaceae of Guyana, Suriname, and French Guiana, Phytotaxa 433 (2), pp. 101-134 : 114-115

3. Phlegmariurus capillaris (Sodiro) B.Øllg., Rodriguésia 63(2): 480. 2012.— Lycopodium capillare Sodiro, Recensio Crypt. Vasc. Prov. Quitenses 90. 1883.— Lycopodium sarmentosum Spring var. capillare (Sodiro) Sodiro, Crypt. Vasc. Quit. 572. 1893; Anal. Univ. Quito 12: 328. 1895.— Urostachys capillaris (Sodiro) Herter, Index Lyc. 54. 1949.— Huperzia capillaris (Sodiro) Holub, Folia Geobot. Phytotax. 20: 71. 1985. Type:— ECUADOR. [Prov. Pichincha?)]: Hda. Guanaxilla, 480 m, Sodiro s.n. (holotype K [K000574395]). The type locality is probably in the area NE of Santo Domingo de los Colorados. Fig. 6B .

Lycopodium sarmentosum Spring var. rubescens Spring, Mém. Acad. roy. Belg. 24 [Mon. Lyc. 2]: 13. 1849.— Urostachys rubescens (Spring) Herter, Index Lyc. 79. 1949. Type:— COLOMBIA. Cauca: Popoyan, Hartweg 1464 (lectotype K [K000574415], annotated by Spring, designated by Øllgaard 1988: 93; isolectotypes B, P [P00559164], NY [00074299-fragm.]).

Lycopodium underwoodianum Maxon, Contr. U. S. Natl. Herb. 13: 41. 1909.— Urostachys underwoodianus (Maxon) Herter, Index Lyc. 87. 1949.— Huperzia underwoodiana (Maxon) Holub, Folia Geobot. Phytotax. 20: 77. 1985. Type:— COSTA RICA: vicinity of Coliblanco, about 1950 m, Maxon 213 (holotype US [001355457]; isotypes BM [BM000936445], C, GH [GH00021605], NY [144040], P [P00559248]).

Lycopodium guatemalense Maxon, Contr. U. S. Natl. Herb. 17: 177, pl. 9. 1913.— Urostachys guatemalensis (Maxon) Herter, Repert. Spec. Nov. Regni Veg. 19: 165. 1923. Type :— GUATEMALA: Pansamalá, Tuerckheim, ed. Donn.-Sm. 957 (holotype US [00135521]; isotype UC).

Plants pendulous, with flaccidly hanging divisions, very delicate, 9–50 cm long. Shoots homophyllous, rarely gradually heterophyllous, 7–15 mm in diam. incl. leaves in basal divisions. Stems excl. leaves 0.3–0.5(–0.8) mm thick near the base, slightly tapering upward, straight or somewhat flexuous, usually bright red, discontinuously sporangiate from 6– 25 cm above the base and upward, to 5(–13) times dichotomous. Leaves almost uniform throughout, borne apparently randomly, spirally arranged, occasionally in pairs or whorls of 3, 1–3(–5) mm apart, spreading, straight to falcately curved, with strongly twisted, often deflexed lamina base, linear-lanceolate, widest in the middle or the basal half,

6–10(–12) × 0.4–0.7(–1) mm, almost flat, or slightly convex adaxially, soft-herbaceous, with obscure to somewhat prominent vein above. Lamina base often tinged with red. Sporangia 0.7–1 mm in diam.

Distribution: —Southern Mexico, Guatemala, Costa Rica, Panamá, Colombia, Venezuela, Guyana, Ecuador, Bolivia, Brazil.

Habitat: —Epiphytic, in lower montane rain forest, 850–1500 m elev.

Specimens examined:— GUYANA: Upper Mazaruni R. basin, Merume Mt., Partang R., 1140 m, Tillett 44850 ( NY) ; Mt. Roraima , upper slope, Im Thurn 192 (K) .

Figures

FIGURE 6. A. Phlegmariurus acerosus—(Ecuador, Holdridge 1652, US). A. Growth habit. A1. Close-up of basal division. A2. Closeup of sporangiate division.—B. Phlegmariurus capillaris—(Colombia, Hartweg 1464, P). B. Growth habit. B1. Close-up of sporangiate division.—C. Phlegmariurus dichotomus—(Ecuador, Holdridge 1654, GH). C. Growth habit. C1. Close-up of sporangiate division. Drawing by B. Johnsen.