Vot.. II.] EVENING-PRIMROSE FAMILY. 499 
1. Stenosiphon linifolium 
(Nutt.) Britton. Flax-leaved 
Stenosiphon. (Fig. 2609.) 
Gaura linifolia Nutt. in Long’s Exp. 2: 
100. 1823. 
Stenosiphon virgaius Spach, Nouv. Ann. 
Mus. Par. 4: 326. 1835. 
Stenostphon linifolium Britton, Mem. 
Torr. Club, 5: 236. 1894. 
Erect, slender, glabrous, 2°-5° high. 
Leaves sessile, lanceolate, linear-lan- 
ceolate or linear, acuminate or acute at 
the apex, narrowed or rounded at the 
base, entire, 1-2’ long, the upper ones 
much smaller; spikes dense, narrow, 
sometimes 1° long in fruit; flowers 
white, 4/’-6’’ broad; calyx-tube very 
slender, 4’’-5’’ long; fruit ovoid, pu- 
bescent, 1//-1%4’’ long, very much 
shorter than the linear-subulate bracts. 
Prairies, Kansas and Colorado to the 
Indian Territory and Texas. June-July. 
20. CIRCAEA L.. Sp: Blo: 1753: 
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 1-2-celled; united styles filiform; 
stigma capitate; ovules usually 1 in each cavity. Fruit obovoid, small, indehiscent, densely 
bristly with hooked hairs, 1-2-celled. [Named for Circe, the enchantress. ] 
About 5 species, natives of the northern hemisphere. Besides the following, another occurs 
on the Pacific Coast. 
Plant 1°-2° high; leaves ovate; hairs of the fruit stiff. 1. C. Lutetiana, 
Plant 3'-8’ high; leaves cordate; hairs of the fruit weak. 2. C. alpina. 
1. Circaea Lutetiana L. Enchanter’s Nightshade. (Fig. 2610.) 
Circaea Lutetianal,.Sp.Pl.9. 1753. 
Erect, branching, finely pubes- 
cent, at least above; stem swollen 
at the nodes, 1°-2° high. Leaves 
slender-petioled, ovate, acuminate 
at the apex, rounded or rarely 
slightly cordate at the base, re- 
motely denticulate, 2’—4/ long; pedi- 
cels 2//-4/’ long, slender, spread- 
ing in flower, reflexed in fruit; 
bracts deciduous; flowers about 1%4// 
broad; fruit broadly obovoid, nearly 
2/’ long, densely covered with stiff 
hooked hairs. 
In woods, Nova Scotia to western 
Ontario, south to Georgia, Nebraska 
and Missouri. Also in Europe and 
Asia. Ascends to 2000 ft. in Virginia. 
Called also Bindweed Nightshade. 
June-Aug. 
