Siphocampylus decumbens (Rich. ex Schult.) Juss. ex A. DC.

Siphocampylus decumbens A. DC. in DC. Prodr. 7: 397. 1839
Lobelia decumbens A. DC. in DC. Prodr. 7: 388, as syn. 1839.
Stem erect or decumbent, herbaceous or slightly woody at base, simple or with few subordinate branches, up to 3 mm. in diameter, up to 75 cm. high, green or straw-colored, glabrous; leaves cauline, about 15, spreading, thin-papery when dry, glabrous, or with a few hairs on the midrib above, the margins coarsely and sharply serrate, the principal teeth 2-4 per cm., 2-3 mm. high, usually with 1-3 intermediate smaller teeth between each pair, the blades elliptic to ovate, 2-4 cm. wide by 5-7.5 cm. long, 1.7-3.5 times as long as wide, the tip acute or somewhat acuminate, the base rounded, attenuate into a slender petiole 1.5-3 cm. long; inflorescence a terminal raceme 15 cm. long or less, loosely few-15-flowered; pedicels spreading-ascending, about 0.5 mm. in diameter, 10-12 mm. long, bristly-pubescent, each with a pair of filiform bracteoles about 2 mm. long, one-fourth to one-third the distance from the base to the apex of the pedicel; flower-bracts foliaceous, elliptic, toothed, the lowest as large as 1.5 cm. broad, 4.5 cm. long, on a petiole 1 cm. long, the upper bracts smaller, about 1 cm. long; flower about 3.5 cm. long, including hypanthium; corolla red, puberulent without, glabrous within except near base, the tube straight, slightly enlarged distally, 21-23 mm. long, fenestrate, the two upper lobes oblong, acute, not curved, about 3.5 mm. wide, 1 1 mm. long, the three lower lobes similar, slightly decurved; filament-tube about 22.5 mm. long, glabrous distally, the filaments free at base and there pubescent, free from the corolla; anther-tube about 4.5 mm. long, all the anthers densely white-hairy near tip, otherwise smooth; hypanthium in anthesis puberulent, depressedhemispheric, rounded or somewhat flattened at base, red; fruit not seen; calyx-lobes subulate, puberulent, obscurely toothed, red, about 1 mm. broad at base, 6 mm. long; seeds not seen.
Type locality: "In Sancto-Domingo" (herb. Paris, Field Mus. Neg. 381971). Distribution: Hispaniola (Haiti; "Santo Domingo").

Siphocampylus decumbens là loài thực vật có hoa trong họ Hoa chuông. Loài này được (Rich. ex Schult.) Juss. ex A.DC. miêu tả khoa học đầu tiên năm 1839.