Lobelia divaricata Hook. & Arn.

Lobelia divaricata H. & A. Bot. Beech. Voy. 301. pi. 67. 1838
Rapuntium pusillum Presl, Prodr. Mon. Lob. 22. 1836. (Haenke, Prahal)
Lobelia pusilla A. DC. in DC. Prodr. 7: 379. 1839. Not Lobelia pusilla G. Don, 1834.
Dortmannia divaricata Kuntze, Rev. Gen. 972. 1891.
Dortmannia pusilla Kuntze, Rev. Gen. 973. 1891.
Lobelia Schmitzii F. E. Winimer, Repert. Sp. Nov. 26: 2. pi. 71, /. 2. 1929.
Lobelia Seleriana F. E. Wimmer. Repert. Sp. Nov. 38: 82. 1935. (Arsine 6995. US!)
Lobelia Irivialis F. E. Wimmer, Repert. Sp. Nov. 38: 83. 1935. (Purpiis 491S, isotype. Gray!)
Stems weak, simple and erect or branched and decumbent, often rooting at the lower nodes, usually not exceeding 1 mm. in diameter at base, usually reddish-purple at base and green above, 6-27 cm. in length, either smooth and glabrous throughout, sparsely pubescent in the lower axils, or plainly hirtellous below; cauline leaves few-1 2, often somewhat appressed, thin, glabrous or pubescent beneath at base, entire or sparingly toothed; principal leaves linear to broadly elliptic, reaching a maximum size of 0.7 cm. wide by 3 cm. long, their tips obtusely rounded to acute and their bases acute, subpetiolate, decurrent; lower leaves relatively broader, often suborbicular, their petioles 0.5 cm. long or less; inflorescence secund, 2-18 cm. long, often appearing pedunculate, loosely 1-10-flowered; pedicels filiform, stiff, strongly ascending, 10-25 (70) mm. long in fruit, smooth and glabrous, or rarely finely prickly, each with a pair of tiny bracteoles at base; flower-bracts linear, or the lower ones leafiike and resembling the upper leaves, the middle ones usually 3-8 mm. long; flower 9-13 mm. long, including h>T3anthium; corolla blue, often with dark veins, glabrous without, the tube sparsely hairy within, 3.5-4.0 mm. long, entire except for the dorsal fissure which extends to a point slightly more than 1 mm. from base, the lower lip with two conspicuous tubercles at base (according to Hooker & Amott) ; the lobes shorter than the tube, the upper ones erect, narrow, those of the lower lip elliptic, reflexed; filament-tube 2.5-3.5 mm. long, blue at least distally, the filaments connate one-half to two-thirds their length, ciliate at base; anther-tube 1.0-1.7 mm. long, gray, the two smaller anthers white-tufted at tip, the others minutely ciliate on backs; h>'panthium in anthesis narrowly obconic, glabrous, becoming cup-shaped or campanulate in fruit, 2-3 mm. across; capsule 5-6 (7.5) mm. long, one-half to three-fifths inferior; calyx-lobes linear or subulate, glabrous, entire, short-pointed, (2) 3-4.5 mm. long; seeds brown, ellipsoid, smooth, shining, 0.3-0.5 mm. long.
Type locality: "Talisco" Qalisco, near Tepic, Nayarit), Beechey (Kew!). Distribution: Coahuila to Mexico (D. F.), Michoacin, and Nayarit, at elevations up to about 2200 m.

Lobelia divaricata là loài thực vật có hoa trong họ Hoa chuông. Loài này được Hook. & Arn. mô tả khoa học đầu tiên năm 1838.