Lobelia flexuosa (C. Presl) A. DC.

Heterotoma flexuosa (Presl) McVaugh, Bull. Torrey Club 67: 143. 1940.
Rapuntiujn flexuosum Presl, Prodr. Mon. Lob. 23. 1836.
Lobelia arabidoides H.& A. Bot. Beech. Vov. 301. pi. 66. 1838. (Beechey, Kew!)
Lobelia flexuosa A. DC. in DC. Prodr. 7; 379. 1839.
Heterotoma arabidioides Benth. in Hook. Ic. 12: 68. 1876.
Heterotoma intermedia Hemsl. Biol. Centr. Am. Bot. 2: 269. 1881. (Seemann 2051, Kew!)
Dortmannia mexicana Kuntze, Rev. Gen. 972. 1891. (Based on Rapuntium flexuosum Presl.)
In habit and vegetative characters very similar to H. cordifolia; cauline leaves linear to elliptic or oblanceolate, the tip usually blunt, the base narrowed to a margined petiole, the blades of upper and middle leaves 0.1-0.7 cm. wide by 3-8 cm. long, 5-15 times as long as wide, the margins shallowly dentate with callose teeth, or sinuate; basal rosette usually present, the leaves narrowly or broadly elliptic or rarely ovate, narrowed and blunt-pointed at tip, the base cuneate or rarely rounded, the petioles of basal leaves mostly 1-2 cm. long, the blades usually shorter and broader than the cauline, 1.5-6 times as long as wide, the margins regularly dentate; inflorescence few-18 cm. long, few-15-flowered, the peduncle (2) 5-10 cm. long; pedicels 17-45 mm. long in fruit; bracteoles as in //. cordifolia; flower-bracts linear, 3-6 (15) mm. long, the lowest, if leafy, linear and entire or essentially so; flower 7-9 mm. long, including hypanthium, the color unknown, apparently white; corolla glabrous, the tube 2.5-3.3 mm. long, the two lobes next the dorsal fissure 2-4 mm. long, the lobes of the lower lip 1.3-2.5 mm. wide by 3.0-4.5 mm. long; filament-tube 1.5-2.5 mm. long; anther-tube 1.0-1.3 mm. long; hypanthium in fruit and flower as in H. cordifolia, 1.7-2.5 mm. in diameter in fruit; spur and capsule as in H. cordifolia, the capsule 2.5-4 mm. long; calyx-lobes 1.5-3.0 mm. long; spur exceptionally as long as 2 mm., usually 1 mm. long or less; seeds as in H. cordifolia.
Type locality: Mexico, Th. Haenke (Praha!).
Distribution: Nayarit to Jalisco and Guerrero, at elevations up to about 1500 m.