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 longifldra Spach. Similar to G. angustifolia 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 suffilta 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 tripétala 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 em. 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 brachycárpa 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 em. 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 
tranverse-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 1n 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, ee 
Mexico. Spring and summer.—The form with merely canescent stems has been separated as a spec 
by Lehmann as G. marginata. 
12. Gaura Drummóndii T. & G. Stem branched at the base, the branches pre 
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 codona 
o red or scarlet : fruit 8-11.5 mm. long, the obconic neck-like base much shorter than 
the y. 
On prairies or river banks, Texas to New Mexico and adjacent Mexico. Spring and summer. 
13. Gaura Michaüxii Spach. Stem 6-18 dm. tall, puberulent, paniculately branched 
above: leaf-blades linear or linear-oblong, acute or acuminate at both ends, Ege : 
remotely dentate, 2.5-8 cm. long: racemes loosely flowered, slender, elongated: 3 a 
canescent: petals white, turning reddish, 4-6 mm. long: fruit puberulent, the 1 ie 
mm. long, sharply 4-angled above, the pedicel-like base as long as the body or near y 59- 
In dry fields, Virginia to Kansas, Florida and Louisiana. Summer and fall. 
14. Gaura sinuàta Nutt. Stem erect or decumbent, 3-9 dm. tall, glabrous iios d 
so, branched at the base: leaf-blades spatulate to lanceolate, or nearly linear, "sem eg 
toothed or pinnatifid, 2.5-8 cm. long, acute or acuminate: buds slightly We ae 
petals 8-10 mm. long: fruit glabrous, at least at maturity, the body 4-ridged and Be thick 
above, fusiform, 5-7 mm. long, merely angled, much longer than the relatively 
pedicel-like base. 
In dry soil, Kansas to Arkan:as, Texas and Mexico. Spring and summer. 
