120 
Spring Flora of Oklahoma 
usually 4, pendulous. Fruit nut-like, ribbed or angled, 1-4- 
seeded. Seeds unappendaged. 
Fruit mainly 3-angled, the base and angles rounded. 
1. G. tripetala. 
Fruit contracted into a slender or stout neck-like or 
pedicil-'like base. 
Pedicel-like base of the fruit very stout and short, 
angled or ribbed, but less so than the body of the 
fruit. 2. G. coccinea. 
Pedicel-like base of the fruit relatively slender and 
long. 3. G. sinuata. 
1. Gaura tripetala Cav. Stem simple or branched at the base, the 
branches 12'-20' tall, hirsute. Leaf blades relatively thick, spatu- 
late to oblong, or linear-elliptic, l'-2' long, acute or slightly acumi¬ 
nate, shallowly but sometimes rather sharply toothed. Spikes elon¬ 
gated. Buds more or less pubescent. Petals 3"-4" long. Fruit 
pyramidal with the base rounded, mostly 3-angled, 3"-4" long, the 
faces somewhat transverse-wrinkled. 
On plains and prairies. April-July. Oklahoma County. 
2. Gaura coccinea Pursh. Scarlet Gaura. Erect or ascend¬ 
ing, much branched, canescent, pubescent or glabrate, 6'-24' high. 
Leaves oblong, lanceolate or linear-oblong, denticulate, repand or 
entire, 6"-18" long, 2"-4" wide. Flowers sessile, red, turning scar¬ 
let, 4"-5" broad. Fruit sessile, terete below, 4-sided and narrowed 
above, canescent, 3"-4" long. 
Prairies and dry soil. Frequent. M|ay-August. 
3. Gaura sinuata Nutt. Wavy-leaved Gaura. Perennial, 
erect or decumbent, glabrous or sparingly villous. Stem 12'-36' 
tall, usually naked above. Leaves oblanceolate to lanceolate or 
nearly linear, sinuate-toothed, l'-3' long. Calyx- slightly pubescent, 
its tube funnel-form, l"-2" long. Petals oblong-obovate, 4"-5" long. 
Stamens shorter than the petals. Fruit about 7" long, glabrous, 4- 
ribbed and 4-grooved above the stout club-shaped pedicel. 
In dry soil. May-July. Common. 
FAMILY 63. AMMIACE^E. Carrot Family. 
Herbs, usually with hollow, grooved stems. Flowers 
small, generally in umbels. Limb of the calyx either 
wanting or present only as a 5-toothed rim or margin 
