Randia obcordata S. Watson

Randia gaumeri Greenm. & Thomps. Ann. Mo. Bot. Gard. 1:
410. 1915. A shrub, the branches whitish, bearing numerous pairs of stout divaricate spines 0.7-1.5 cm. long, the leaves clustered on very short lateral spurs; stipules minute, whitish, mucronate; petioles slender, 2-3 mm. long; leaf-blades cuneate-orbicular or broadly cuncale-obovate,
0.5-1.5 cm. long, 0.5-1. 1 cm. wide, cuneate or broadly cuneate at the base, broadly rounded or
subretuse at the apex, membranaceous, minutely ciliolate, glabrous or puberulent above near
the base, the lateral nerves inconspicuous, 3 or 4 on each side, ascending at an acute angle;
flowers perfect, terminal, solitary, sessile, 4-5-parted; calyx and hypanthium 1-1.5 mm. long,
glabrous, the calyx-lobes deltoid, ciliate, about half as long as the tube; corolla 5-6 mm. long,
glabrous outside, obtuse in bud, the tube cylindric, the throat naked, the lobes ovate-oblong,
obtuse, equaling the tube; anthers subexscrud.
Type locality: Izamat, Yucatan. Distribution: Yucatan.

Randia obcordata S. Wats. Proc. Am. Acad. 24: 53. 1889 A shrub 2-3 meters high, the branches stout, brown or gray, glabrate, bearing few or numerous pairs of stout divergent spines 6-10 mm. long, the leaves crowded on very short, nearly obsolete lateral spurs; stipules minute, imbricate; leaf-blades flabellate, broadly cuneateorbicular, or obcordate, 0.4-1.8 cm. long and broad, decurrent at the base to a short ciliolate petiole, truncate or retuse at the apex, glabrous, usually ciliolate, the lateral nerves obscure; flowers terminal, solitary, sessile; fruit globose, 6-8 mm. in diameter, black, more or less rugose, lustrous, glabrous, the pericarp very thick; seeds 2-4, oval or suborbicular, brown, 5 mm. long.
Type locality: On high gravelly mesas near Guaymas. Sonora. Distribution: Dry plains and hillsides, Sonora to Colima.

Randia rhagocarpa Standley, Contr. U. S. Nat. Herb. 23: 1376
1926. A densely branched shrub 2-3 meters high, the branches brown or grayish, bearing numerous pairs of stout divaricate spines 1-1. S cm. long, the leaves crowded on short lateral spurs; stipules 1.5 mm. long, broadly ovate, acuminate, scaberulous or glabrate outside, glabrous within; petioles slender, 2-7 mm. long, ciliolate or glabrate; leaf-blades cuneate-orbicular or rounded-obovate, 1-4 cm. long, 1-3 cm. wide, rounded or truncate at the apex, sometimes emarginate, cuneate or acuminate at the base, chartaceous or subcoriaceous, ciliolate, dull above and whitish-puncticulate, scaberulous along the costa, appressed-pilosulous or glabrate beneath, the lateral nerves plane or subimpressed, 3 or 4 on each side, the margin plane; flowers terminal, sessile; fruit globose, 10-12 mm. in diameter, smooth and black at maturity, very lustrous, the pericarp thin; seeds about 8, suborbicular or rhombic, 5-7 mm. long, dark-brown.
Type locality: Vicinity of Victoria, Tamau'.ipas, altitude 320 meters. Distribution: Dry hillsides, Tamaulipas.

Randia obcordata là một loài thực vật có hoa trong họ Thiến thảo. Loài này được S.Watson miêu tả khoa học đầu tiên năm 1889.