Bouteloua juncea (Desvaux. ex Beauvois) Hitchcock (1913: 343) . Fig. 1.

≡ Triaena juncea (Desvaux ex Beauvois) Griffiths (1912: 354) .

≡ Cynodon junceus (Desvaux ex Beauvois) Raspail (1825: 303) .

≡ Eutriana juncea (Desvaux ex Beauvois) Trinius (1824: 238) .

≡ Atheropogon domingensis Sprengel (1825: 293) .

≡ Triathera juncea Desvaux ex Beauvois (in Beauvois 1812: 40).

Lectotype (designated by Sandoval-Ortega et al. 2019): — Plate IX, figure IVa-d in Essai d’une Nouvelle Agrostographie 1812. Epitype (designated by Sandoval-Ortega et al. 2019): — DOMINICAN REPUBLIC, Barahona, Quita Coraza: Entrada a Pueblo Quita Coraza, orilla de carretera, 18°28’16.7”N 71° 3’37.7”W, 126 m., 19 June 2018, Sandoval-Ortega 1006 (HUAA 30899!) .

Description:— Herbs perennial, stoloniferous, tufted; culms 10–20 cm tall, thin, the fertile ones erect, ascending or geniculate, nodes pubescent; leaves with glabrous sheath, blade flat or involute, 8–50 × 1–1.2 mm; ligule a membrane, long ciliate (Fig. 2A), trichomes 0.3–0.5 mm long; synflorescence a terminal spike 1–2(3) cm long (Fig. 2B); spikelets (8)10–25(35), drooping, solitary (Fig. 2B and 2C); glumes linear lanceolate, 1-nerved, acuminate, distinct, the first ca. 1 mm long, the second 2–2.5 mm long (Fig. 2D); fertile floret 1 (Fig. 2E), lemma ovate elliptic 2–3 mm long, 3-nerved, apex 3-mucronate (Fig. 2F), palea ovate-lanceolate, shorter than lemma, ca. 2 mm long, apex 2-mucronate (Fig. 2G); sterile floret 1, reduced to a short column with three scabrous awns ≤ 1 cm long (Fig. 2H); caryopsis oblong-elliptic, ca 1.5 mm long (Fig. 2I).

Phenology:— Specimens with spikelets have been collected from March to June.

Distribution and habitat:— Cuba, Haiti, the Dominican Republic, Puerto Rico, and the Virgin Islands (Fig. 3). It grows close to the coast in coastal and subcoastal xeric scrub, microphyllous evergreen forest and dry forest, between -30 and 400 m.

Examined material:— CUBA. Granma: Farallón de El Dudoso, oeste de ensenada de Mora -Pilón- (Oriente), 30 December 1938, León 18610 (HAC) . Guantánamo: US Naval Base, Guantánamo bay, Kittery Beach, ca. 0 m., 19°53’45.7’’N 75°77’51.1’’W, 4 October 1996, Areces 6540 (UPRM) ; Imías, 5 February 1976, Catasús 979 (HAC) ; Orillas de la Vía Azul, Yacabo, 12 January 1960, Alain & Acuña 7483 (HAC); Zona seca Baitiquiri, Sur de Baracua, Provincia Oritente, 12 January 1969, Alain s.n. (HAC) ; Macambo, 28 May 1982, Bisse s.n. (HAC) ; Imías, camino de Yacabo arriba, 7 February 1976, Bisse s.n. (HAC) ; La Chivera, 23 May 1982, Günther s.n. (HAJB); Imías, Por el camino a Yacabo Arriba . Guantánamo, 7 February 1976, Catasús s.n. (HAJB); Playa Borracho, 6 July 1984, Bermúdez 2221 (HAJB) ; Próximo a San Antonio del Sur . Guantánamo, 25 November 1978, Catasús 1189 (HAJB); Vía Azul, 12 January 1960, Alain 7483 (HAJB) . HAITI. Dept . Ouest: Montagnes du Trou d’Eau, Between Source Matelas and Source Puantes, 15 October 1924, Ekman 1057 (P) . DOMINICAN REPUBLIC. Azua: al N de la población, Howard 8640 (USD); a 2.3 km al NO de la entrada al poblado de Hatillo, 30 m., 16 September 1999, Veloz 1776 (JBSD); Hatillo, Entrada al pueblo Hatillo, orilla de carretera, 126 m., 18°24’00’’N 70°31’53.1’’W, 19 June 2018, Sandoval-Ortega 1005 (JBSD, HUAA, USON); Dry hills N of Azua, 29 August 1946, Howard 8640 (P) . Barahona: Las Salinas, 19 August 1946, Howard 8363 (USD); 2 km desde Fondo Negro en la carretera a Quita Coraza y Azua, 100 m., 18°27´N 71°05´W, 15 June 1982, Zanoni 20935, (JBSD); Quita Coraza: Entrada a Pueblo Quita Coraza, orilla de carretera, 126 m., 18°28’16.7”N 71°3’37.7”W, 19 June 2018, Sandoval-Ortega 1006 (JBSD, HUAA, USON) . Independencia: Hoya de Enriquillo, 10 km al oeste de Duverge, en el camino viejo a Jimaní, en la orilla del lago Enriquillo, - 30 m., 18°25´N 71°37´W, 16 April 1987, Zanoni 39083 (JBSD) . Monte Cristi: 2 km antes de la ciudad, entre ésta y el poblado El Rincón, 10– 20 m., 19°47´N 71°38´W, 16 August 1984, García 168 (JBSD) . Peravia: Aprox. 3 km al este de Las Calderas (o 18.5 km desde Baní en la carretera a Las Calderas), 30 m., 18°13´N 70°28´W, 23 July 1982, Zanoni 22016 (JBSD) ; Baní, 8 km al Oeste de Baní, 28 August 1946, Howard 8627 (USD, P) ; Carretera Baní-Azua, 20 m., 23 June 2006, Siqueiros-Delgado s.n. (HUAA, IEB) ; Matanzas, Playa Matanzas, 18°13’53.6’’N 70°24’45.0’’W, 19 June 2018, Sandoval-Ortega 1004 (JBSD, HUAA, USON) . Valverde: 1.5 km al NE del cruce Los Quemados, sobre una loma en el lado N de la carretera hacia Mao, 180 m., 19°30’N 71°9.5´W, 9 June 1987, García 2216 (JBSD) . PUERTO RICO. Guánica: Bo. Montalva, Guanica Forest Reserve, along dirt road over Monte de la Brea to seashore, 5– 20 m., 17°56.03´N 66°56.34´W, 26 March 1995, Axelrod 8856 (UPRRP) ; Bo. Montalva, Guanica Forest Reserve, along dirt road over Monte de la Brea to seashore, 5– 20 m., 17°56.03´N 66°56.34´W, 26 March 1995, Axelrod 8862 (UPRRP) ; Montalva, Monte de la Brea , Guanica Forest Reserve. From road 325 taking a dirt road south to Punta Manguillo, 12 m., 17°56’11’’N 66°56’33’’W, 20 November 2004, Monsegur 278, (UPRM) ; Punta La Brea, 30 m., 17°56’11’’N 66°56’3’’W, 30 June 20018 Sandoval-Ortega 1007, (UPRRP, HUAA, USON) ; Guanica State Forest: Barrio Montalva. Interior slopes of Monte de la Brea, 40– 50 m., 9 December 1987, Proctor 44315 (HAJB) . VIRGIN ISLANDS. Salt Island, S of Tortola, NW bay, ca. 10 m., 22 June 1968, Byer 68-1729 (UPRRP) .