848 EPILOBIACEAE 



to narrowly linear-lanceolate, 2-10 cm. long, acute or acuminate, sharply, but finely toothed, 

 or entire and somewhat reduced, especially toward the inflorescence : spikes elongated, in- 

 terrupted : buds puberulent, less than 1.5 cm. long : petals pink-purple, about 7 mm. long : 

 fruit narrowly elliptic, 6-7 mm. long, sessile, canescent. 



On banks or in sandy soil, Arkansas to Mississippi and Texas. Summer and fall. 



7. Guara longiflora Spach. Similar to G. anyustifolia in habit. Leaves rather 

 numerous ; blades linear, narrowly so above, remotely and inconspicuously toothed or 

 entire, somewhat revolute, acute or acuminate : spikes elongated, interrupted : buds 

 canescent-puberulent, over 2 cm. long : petals pink, about 10 mm. long : fruit oval-elliptic, 

 about 4 mm. long, canescent, sessile. 



In sandy soil, Mississippi, Louisiana and Texas. Spring and summer. 



8. Gaura suffiilta Engelm. Stem simple or usually branched at the base, the 

 branches ascending, 3-6 dm. tall, hirsute, at least below : leaf-blades spatulate to linear, 

 2.5-7 cm. long, acute or acuminate, sinuate or undulate: spikes virgate, usually simple, 

 interrupted : buds glabrous or essentially so : petals 8-9 mm. long : fruit ovoid or oval- 

 ovoid, 4-5 mm. long, wing-angled above, obtusely angled below, glabrous, sessile. 



On prairies or mountain slopes, Texas and northern Mexico. Spring to fall. 



9. Gaura tripgtala Cav. Stem simple or branched at the base, the branches 3-5 dm. 

 tall, hirsute, sometimes with few branches : leaf-blades relatively thick, spatulate to 

 oblong, or linear-elliptic, 2.5-5 cm. long, acute or slightly^ acuminate, shallowly, but some- 

 times rather sharply, toothed : spikes elongated, interrupted : buds more or less pubescent : 

 petals 5-7 mm. long : fruit pyramidal with the base rounded, mostly 3-angled and the 

 angles rounded at the base, 6-7 mm. long, the faces somewhat transverse-wrinkled. 



On plains and prairies, the Indian Territory, Texas and Mexico. Spring and summer. 



10 Gaura brachycarpa Small. Stem usually branched at the base, the branches 

 decumbent 1-3.5 dm. long, simple or sparingly branched, finely hirsute : leaf-blades rela- 

 tively thin, spatulate to lanceolate or almost linear, 1.5-4.5 cm. long, acute, undulate or 

 sinuate, or the lower ones lyrate-sinuate : spikes slender, much interrupted at maturity : 

 buds pubescent : petals 8-9 mm. long: fruit pyramidal with the base flat, 5-7 mm. long, 

 nearly glabrous, mostly 4-angled and the angles auricled at the base, the faces prominently 

 t ran verse-wrinkled. 



In dry soil, southern Texas. Spring and summer. 



11. Gaura coccinea Pursh. Stem branched at the base, the branches erect or decum- 

 bent, often much branched, 1.5-6 dm. high, hirsute and canescent : leaves numerous ; 

 blades oblong, lanceolate, linear-oblong or linear-lanceolate, repand or on the ultimate 

 branches entire, acute or obtuse at the apex, 1-3.5 cm. long : racemes elongating in age : 

 bracts persistent : corolla red, turning scarlet : fruit 5-7 mm. long, the neck-like base 

 nearly as long as the body. 



On prairies and in dry soil. Manitoba to Minnesota, Montana, Texas, Utah and Arizona, and in 

 Mexico. Spring and summer. The form with merely canescent stems has been separated as a species 

 by Lehmann as G. marginata. 



12. Gaura Drummondii T. & G. Stem branched at the base, the branches spread- 

 ing or decumbent, 3-7 dm. long, more or less branched, more or less hirsute : leaf-blades 

 oblong-spatulate to oblong, elliptic or lanceolate, 2-4 cm. long, sinuate-toothed, or some- 

 times merely undulate, acute or obtuse : racemes elongating in age : bracts caducous : 

 corolla red or scarlet : fruit 8-11.5 mm. long, the obconic neck-like base much shorter than 

 the body. 



On prairies or river banks, Texas to New Mexico and adjacent Mexico. Spring and summer. 



13. Gaura Michauxii Spach. Stem 6-18 dm. tall, puberulent, paniculately branched 

 above : leaf-blades linear or linear-oblong, acute or acuminate at both ends, sinuate or 

 remotely dentate, 2.5-8 cm. long : racemes loosely flowered, slender, elongated : buds 

 canescent : petals white, turning reddish, 4-6 mm. long : fruit puberulent, the body 3-4 

 mm. long, sharply 4-angled above, the pedicel-like base as long as the body or nearly so. 



In dry fields, Virginia to Kansas, Florida and Louisiana. Summer and fall. 



14. Gaura sinuata Nutt. Stem erect or decumbent, 3-9 dm. tall, glabrous or nearly 

 so, branched at the base : leaf-blades spatulate to lanceolate, or nearly linear, sinuate- 

 toothed or pinnatifid, 2.5-8 cm. long, acute or acuminate : buds slightly pubescent : 

 petals 8-10 mm. long : fruit glabrous, at least at maturity, the body 4-ridged and 4-grooved 

 above, fusiform, 5-7 mm. long, merely angled, much longer than the relatively thick 

 pedicel-like base. 



In dry soil, Kansas to Arkansas, Texas and Mexico. Spring anl summer. 



