Lobelia assurgens L.

Lobelia assurgens L. Syst. Nat. ed. 10. 1237. 1759
Stem coarse, shrubby, 0.9-2.4 m. high, glabrous below, angled by the persistent ridges formed by the decurrent leaf-margins; cauline leaves few-20, 4.5-11 cm. wide by 14-38 cm. long, usually about 3-5 times as long as wide, spreading, thin and membranous, smooth, glabrous above, sparsely chaffy-pubescent along the main veins beneath, the blades elliptic, rather abruptly narrowed to a short-acuminate tip about 2 cm. long, somewhat less abruptly narrowed to the attenuate subpetiolate base, the winglike margins decurrent, serrate, the teeth in the apical half of the blade mostly callose, 2-5 per cm., not over 1 mm. long, the teeth on the basal part of the blade often distant, as much as 1.5 cm. apart and prolonged into spiniform processes as much as 1 cm. long; inflorescence few-35 cm. long, densely few-60flowered; pedicels in anthesis spreading-ascending, in fruit becoming loose and spreading, 1 mm. in diameter (flattened and up to 2 mm. wide where the bracteoles are decurrent), 17-33 mm. long; flower-bracts linear or the lowest broader, finely serrate with callose teeth, the margins decurrent; length of bract as much as 7 cm., but usually less; bracts often adherent to the base of the pedicel for a distance of 1-5 mm. and sometimes seeming to arise from the pedicel; flower not inverted in anthesis; corolla dull or dark red, the tube strongly falcate, the lobes recurved, not spreading, the two upper ones linear, 2 mm. wide or less, 12-13 mm. long, the lobes of the lower lip linear-elliptic, slightly broader and shorter than the others and more strongly recurved, united at base, their tips free about 6 mm. ; filament-tube deflexed and much e.serted, the filaments united more than half their length; hypanthium in anthesis turbinate or cup-shaped, usually acute at base, in fruit higher than broad, 7-9 mm. wide; capsule a little more than half inferior, 10-15 mm. long; calyx-lobes linear or subulate, with deltoid base, attenuate at tip, with 5-10 callose teeth on each edge; seeds oblong-ovoid, shallowly and regularly impressed-reticulate.
Type locality: Jamaica, P. Browne (herb. Linn., photo.!).
Bracteoles of the pedicel 12-22 mm. long, standing 5-10 mm.
below the base of the hypanthium ; inflorescence when young
conspicuously whiteor brownish-tomentose; native of
Jamaica. 5Sa. I., assurgens &t. jamaiccnsis.
Bracteoles of the pedicel 5-10 mm. long, about the middle of the
pedicel or below; inflorescence densely short-pubescent, but
not conspicuously tomentose; native of Cuba (and Haiti?). 586. L. assurgens var. santa-clarae.
58a. Lobelia assurgens var. jamaicensis Urban, ,Symb. Ant. 1:453. 1900.
Ijybelia assurgens L. loc. cit., as to type. Tylomium assurgens Presl, Prodr. Mon. Lob. 32. 1836. Tupa assurgens A. DC. in DC. Prodr. 7: 394. 1839. Dortmannia assurgens Kuntzc, Rev. Gen. 972. 1891.
iMhelia jamaicensis Urban, Ark. Hot. 23A': 104. 1930. (Ba.scd on I.ohclia assurgens r. jamaicensis Urban .)
Pedicels densely short-tomentosc with white or brownish wool, each with a pair of subopposite bracteoles 2-10 mm. below the hypanthium; bracteoles decurrent, tomentose, linear, acute, entire falways?), 12-22 mm. long; flower-bracts woolly or the lowest nearly glabrous; calyx-lobes about 2 mm. wide by 12-22 mm. long, tomentose; flower about 40 mm. long, including hypanthium; corolla 26-30 mm. long, tomentose without, especially near the tips of the lobes, nearly glabrous within, the tube about 17 mm. long, fenestrate or entire except for the dorsal fissure; filament-tube 20-25 mm. long, tomentose or distally nearly glabrous; antlicrtubc 7-9 mm. long, the two smaller anthers short-bearded at apex and usually whitc-ttiftcd at base, the three larger anthers often sparsely white-bearded near apex and sometimes tufted at base.
TvPB ix>cai.ity: Jamaica (type not designated).
Distribution: I^tem Jamaica (Blue Mountain!i and Port Koyal Mountninn).

Lobelia assurgens là loài thực vật có hoa trong họ Hoa chuông. Loài này được L. mô tả khoa học đầu tiên năm 1759.