Prestonia speciosa J. D. Sm.

Prestonia speciosa Donn. Smith, Bot. Gaz, 27: 435. 1899
Fruticose liana, ferruginous-pubescent throughout; leaves firmly membranaceous, ovate to ovate-elliptic, 10-17 cm. long, 7-11 cm. broad, abruptly and shortly acuminate, broadly obtuse or founded at the base, sparsely and minutely hispidulousstrigillose above, tomentulose along the midrib and veins beneath, the petioles 5-12 mm. long, tomentulose; inflorescence subumbellate, simple, bearing 4-8 bright-yellow flowers, the peduncle scarcely longer than the subtending petioles, f erruginous-tomentulose ; pedicels 10-15 mm. long, tomentulose; bracts narrowly lanceolate, 2-5 mm. long, slightly foliaceous; calyx-lobes ovate to ovate-oblong, acute, 1 2-15 mm. long, foliaceous, minutely and rather irregularly hirtellous ; corolla infundibuliform, appressed-villosulous externally, the tube proper 15-17 mm. long, about 3.5 mm. in diameter at the base, the throat rather narrowly conic-campanulate, 15-16 mm. long, 8-9 mm. in diameter at the orifice, the epistaminal appendages replaced by inconspicuous obtriangularfoveolate protuberances, the lobes obliquely obovate, 20-25 mm. long, widely spreading; anthers glabrous, included; nectaries concrescent, rather obscurely and irregularly lobed, somewhat longer than the ovary; follicles unknown.
Type locality: Buena Vista, Santa Rosa, Guatemala; alt. 1700 meters. Distribution: Guatemala and El Salvador.

Prestonia speciosa là một loài thực vật có hoa trong họ La bố ma. Loài này được Donn.Sm. miêu tả khoa học đầu tiên năm 1899.