9. Filaments 8-11 mm. long; plants long-hirsute (especially the hypanthium); 



flowers few and distant; calyx lobes broadly ovate-cordate at base 

 and abruptly tapered above, with a dense tuft of hair at the base.... 

 7. L. Reverchonii. 



10(6). Corolla tube evidently fenestrate laterally; seeds smooth, polished; annual 

 or biennial with a stout taproot and coarsely serrate leaves; in the 

 Texas Trans-Pecos 4. L. fenestralis. 



10. Corolla tube not fenestrate laterally; seeds rough or smooth; annuals or 



perennials with the leaves entire to irregularly dentate (11) 



11(10). Plant with a perennial rootstock; cauline leaves linear to linear-lanceo- 

 late, acuminate; distribution New Mexico and Arizona 



2. L. anatina 



11. Plant annual; cauline leaves ovate to lanceolate, obtuse to acute; distribution 



east of New Mexico and Arizona (12) 



12(11). Seeds rough, cellular-reticulate; calyx lobes usually with at least some 

 vestige of triangular or foliaceous auricles at base; eastern Texas 

 and Oklahoma 3. L. appendiculata. 



12. Seeds smooth, polished; calyx lobes without any auricles at base; southern 



and southwestern Texas (13) 



13(12). Calyx lobes ciliate; leaves mostly cauline; pedicels nearly upright, 4-10 

 mm. long in fruit 1. L. Berlandieri var. brachypoda. 



13. Calyx lobes glabrous; leaves mostly in basal rosette; pedicels often incurved, 



1. L. Berlandieri var. Berlandieri. 



1. Lobelia Berlandieri A. DC. 



Annual to about 6 dm. high; stems erect to decumbent, simple or with as many 

 as 20 ascending branches, glabrous to sparsely pubescent near base; leaves with- 

 out or with a marginal petiole to 25 mm. long, often near the base or in a basal 

 rosette but also cauline, thin, broadly ovate to elliptic or lanceolate, to 5 cm. 

 long and 35 mm. wide, rounded to cuneate at base, rounded to obtuse at apex, 

 glabrous to ciliate near base, the margins subentire to coarsely and irregularly 

 toothed; inflorescence to about 25 cm. long; pedicels to 2 cm. long in fruit, 

 glabrous or slightly bristly, nearly upright or usually incurved above the middle, 

 with a pair of tiny bracteoles at base; bracts linear to linear-subulate, 3-9 mm. 

 long, glabrous or ciliate; flowers 1-1.3 cm. long; calyx lobes linear-subulate, 

 entire, glabrous to sparsely ciliate, 1.5-3.5 mm. long; corolla pale- or bright- 

 purplish-blue with a white eye, glabrous or hairy within at the summit of the 

 tube; filament tube 2.5-3.5 mm. long; anther tube 1-1.5 mm. long, light-bluish- 

 gray; capsules ellipsoid, 3-6 mm. long. 



In sandy, rocky or clay soils in fields, moist areas and along streams, spring- 

 summer. 



The var. Berlandieri occurs in the Rio Grande Plains of south Texas and south 

 into Mexico. The var. brachypoda (Gray) McVaugh, with leaves mostly cauline, 

 occurs in Texas in the Edwards Plateau and Trans-Pecos. 



2. Lobelia anatina Wimmer. 



Plants with a perennial rootstock, to about 6 dm. tall, glabrous; basal leaves 

 oblanceolate, to about 7 cm. long and 1.5 cm. wide; cauline leaves linear to 

 linear-lanceolate, acuminate, to about 8 cm. long, less than 1 cm. wide, narrowed 

 at base, never clasping, shallowly dentate to subentire; calyx about 7 mm. long, 

 irregularly linear-subulate lobed to below the middle; corolla blue, about 2 cm. 

 long, divided to about the middle into elliptic-obovate lobes, the tube entire 

 except for the dorsal slit; filament tube 3.5-5 mm. long, the 2 smaller anthers 

 white-tufted, the 3 larger ones smooth or nearly so. 



1576 



