Guettarda tortuensis Urb. & Ekman

Guettarda tortuensis Urban & Ekman; Urban, Ark. Bot. 21A^:
78. 1927.
A small tree, the j'oung branchlets compressed, minutely pulverulent, the internodes 2-5 cm. long; stipules ovate, acute, as much as 15 mm. long; leaves opposite, the rather stout petioles 1-3 cm. long; leaf-blades ovate, oval, or rounded-ovate, 5-13 cm. long, 3-8 cm. wide, rounded at the apex, narrowly or broadly cordate at the base, subcoriaceous, dark-green above, lustrous, glabrous, the venation more or less impressed, beneath pale, minutely tomentulose, the costa slender, prominent, the lateral nerves elevated, 7-9 on each side, the basal ones subhorizontal, the upper ones ascending at an angle of 45-50 degrees, the veins prominent and very closely reticulate; inflorescences axillary, on peduncles 2.5-5 cm. long, twice-cymose, or trichotomous at the base, the branches 5-20 mm. long, with 5 or fewer flowers, the bracts lanceolate or linear, caudate-acuminate, 1 1 mm. long or shorter; calyx tomentulose, closed in bud, filiform-produced, dehiscing as a cap in anthesis, the persistent portion 2-3.5 mm. long; corolla white, up to 3.2 cm. long, the tube slender, very shortly and densely retrorse-pilose, pubescent within, the 6 or 7 lobes obovate or obovate-oblong, 7 mm. long; anthers linear, 2 mm. long; style 15 mm. long, minutelj' pilose; ovary about 5 -eel led.
Type locality: In calcareous soil, Tete de ITle, La Tortue Island, Haiti. Distribution: La Tortue Island, Haiti.

Guettarda tortuensis là một loài thực vật có hoa trong họ Thiến thảo. Loài này được Urb. & Ekman mô tả khoa học đầu tiên năm 1927.