Lyonia eggersii Urban, Symb. antill. 7: 534. 1913.  Xolisma eggersii (Urban) Small, N. Amer. Fl. 29(1): 71. 1914.  Type.  Dominican Republic.  Nr. Constanza, in Valle Nuevo, 2270 m, 29 May 1887, Eggers 2199b (holotype, B, n.v., destroyed; frag. of holotype, NY).

    Evergreen, usually compact shrub to 2(-2.5) m tall, often from an underground woody burl, with gray, longitudinally furrowed bark; twigs slightly to moderately angled, stout, sparsely to moderately lepidote, otherwise usually densely pubescent; buds ovoid, 0.7-2 X 0.9-2 mm, lepidote.  Leaf blades elliptic to ovate (obovate), 1.8-5(-6.5) x 0.8-2.5(-3.6) cm, ± flat, strongly coriaceous, ca. 0.35-0.47 mm thick; base narrowly cuneate to rounded; apex acute, rounded, or truncate; margin plane (very slightly revolute), apical portion strongly to obscurely and irregularly toothed, basal portion entire to obscurely toothed; venation brochidodromous, 3o veins ± reticulate; adaxial surface lepidote but scales usually quickly deciduous, densely pubescent on midvein, sometimes sparsely pubescent on major 2o veins, the veins faintly visible to obscure, occasionally some 2o veins very slightly depressed; abaxial surface moderately lepidote, otherwise glabrous, but often sparsely to moderately pubescent on midvein, especially basal portion, the 3o and higher order veins obscure to very slightly raised, not forming dense, fine, raised network, the 2o veins obscure to slightly raised and visible; scales rust colored, persistent to deciduous, ca. 0.08-0.25 mm in diameter, erose to nearly entire; petiole 2.6-6(-8) mm long, lepidote, otherwise pubescent adaxially or all around; flower buds ± intermixed with vegetative buds.  Inflorescences fasciculate (shortly racemose), 5- to 18-flowered; pedicels clearly articulated with calyx, slender, 4-13(-17) mm long, lepidote, otherwise usually densely pubescent; bracteoles opposite to subopposite, basal or nearly so, narrowly triangular, 1.3-2 mm long; floral bracts to ca. 3 mm long.  Flowers 5- (6-)merous; calyx lobes triangular, with acuminate apices, 1.2-2 x 0.8-1.4 mm, adaxial side sparsely pubescent, especially near apex, abaxial side lepidote, otherwise glabrous to sparsely pubescent (near base); corolla cylindrical, white, usually slightly pink tinged, especially near mouth, (5.5-)6.5-10 x (2.4-)3-4.5 mm, abaxially sparsely lepidote; filaments roughened, 3-5.5 mm long, unappendaged (with very minute spurs near junction with anthers); anthers 1-1.5 mm long; ovary lepidote, otherwise pubescent, placentae ± subapical.  Capsule ellipsoid to ovoid, 4-7 x 3-5 mm, slightly lepidote, otherwise sparsely to densely pubescent, especially near base, the pale, very thick sutures separating as unit from adjacent valves; seeds 1.2-2.5 mm long.

    Distribution.  Endemic to Hispaniola, chiefly in high-elevation Pinus occidentalis forests of the Cordillera Central, at (1700-)2000-3100 m elev.;  a single collection known for Massif de la Selle, 2500 m elev.  Flowering probably chiefly late March through June.