6io 



OXAGRACEAE. 



VOL. II. 



5. Gaura villosa Torr. Woolly 

 Gaura. Fig. 3072. 



Gaura vilosa Torr. Ann. Lye. N. Y. 2 : 200, 

 1827 



Perennial, erect or neariy so, canescent 

 or villous. Stems i-3 tall, simple or 

 much branched, often naked above ; leaves 

 varying from lanceolate to oblanceolate or 

 sometimes nearly linear, i'-3' long, sinuate- 

 toothed or pinnatifid, 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 slender 

 filiform pedicel. 



In dry soil, Kansas to Arkansas and Texas. 

 Wild honeysuckle. June-Sept. 



19. STENOSIPHON Spach, Nouv. 

 Ann. Mus. Par 4: 326. 1835. 



Erect perennia. 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. 



1. Stenosiphon linifolium (Nutt.) 

 Britton. Flax-leaved Steno- 

 siphon. Fig. 3073. 



Gaura linifolia Nutt. in Long's Exp. 2: 100. 



1823. 

 Stenosiphon virgatus Spach, Nouv. Ann. 



Mus. Par. 4: 326. 1835. 

 Stenosiphon linifolium Britton, Mem. Torr. 



Club 5: 236. 1894. 



Erect, slender, glabrous, 2-5 high. 

 Leaves sessile, lanceolate, linear-lanceo- 

 late or linear, acuminate or acute at the 

 apex, narrowed or rounded at the base, 

 entire, i'-2' long, the upper ones much 

 smaller; spikes dense, narrow, some- 

 times i long in fruit; flowers white, 

 4"-6" broad ; calyx-tube very slender, 

 4"-5" long; fruit ovoid, pubescent, 

 \"-\\" long, very much shorter than the 

 linear-subulate bracts. 



Prairies, hills and plains, Nebraska and 

 Colorado to Texas. June-July. 



20. CIRCAEA [Tourn.] L. Sp. 



PI- 9- J753- 



Low slender perennial herbs, with opposite petioled dentate leaves, and small white per- 

 fect flowers in terminal and lateral racemes. Calyx-tube hairy, slightly prolonged beyond 

 the ovary, its limb 2-parted Petals 2, obcordate, inserted on the perigynous disk. Stamens 



2, alternate with the petals; filaments filiform. Ovary i-2-celled; united styles filiform; 

 stigma capitate ; ovules usually i in each cavity. Fruit obovoid, small, indehiscent, densely 

 bristly with hooked hairs, i-2-celled. [Named for Circe, the enchantress.] 



Abous 8 species, natives of the northern hemisphere. Besides the following another occurs on 

 the Pacific Coast. Type species : Circaea lutetiana L. 



