498 ONAGRACEAE. [VOL. II. 



5. Gaura sinuata Nutt. Wavy -leaved Gaura. (Fig. 2607.) 



Gaura sinuata Nutt.; Ser. in DC. Prodr. 3: 

 44. 1828. 



Perennial, erect or decumbent, glabrous, 

 or rarely sparingly villous. Stem branched 

 at the base or throughout, I "-3 tall, usu- 

 ally naked above ; leaves oblanceolate to 

 lanceolate, or nearly linear, sinuate- 

 toothed, i '-3' long, acute, on winged 

 petioles or nearly sessile; calyx slightly 

 pubescent, its tube above the ovary fun- 

 nelform, i"-2" long, several times shorter 

 than the linear segments; petals oblong- 

 obovate, 4 // -5 // long; stamens shorter 

 than the petals; fruit about 7" long, 

 glabrous, 4-ridged and 4-grooved above 

 the stout club-shaped pedicel. 



In dry soil, Kansas to Arkansas and Texas. 

 May-July. 



6. Gaura villdsa Torr. Woolly Gaura. (Fig. 2608.) 



Gaura villosa Torr. Ann. Lye. N. Y. a: 200. 

 1827. 



Perennial, erect or nearly so, canescent 

 or villous. Stems i-3 tall, simple or 

 much branched, often naked above; 

 leaves varying from lanceolate to oblan- 

 ceolate or sometimes nearly linear, i'~3' 

 long, sinuate-toothed or pinnatiful, acute 

 or acuminate, sessile; calyx canescent, 

 its tube above the ovary funnelform, 

 i"_2" long, several times shorter than 

 the linear acute segments; petals oblong- 

 obovate, 5 // -7 // long; stamens shorter 

 than the petals; fruit about 5" long, 

 sparingly pubescent, the body sharply 

 4-angled, abruptly narrowed into a slen- 

 der filiform pedicel. 



In dry soil, Kansas to Arkansas and Texas. 

 June-Sept. 



19. STENOSIPHON Spach, Nouv. Ann. Mus. Par. 4: 326. 1835. 



Erect perennial herbs, with slender upright branches, alternate sessile narrow leaves, 

 and white sessile flowers in narrow terminal spikes. Calyx-tube filiform, much prolonged 

 beyond the ovary, 4-lobed. Petals 4, clawed, unequal. Stamens 8, declined, not appendaged 

 by scales at the base; filaments filiform. Ovary i-celled; united styles slender; stigma 

 4-lobed, subtended by a cup-like border as in Gaura; ovules commonly 4. Fruit 8-ribbed, 

 indehiscent, i-celled, i-seeded. Seed pendulous. [Greek, referring to the slender calyx- 

 tube.] 



A monotypic genus of the south-central United States. 



