PRIMROSE FAMILY. 



591 

 Prairie Moneywort. Linear- 



VOL. II.] 



5. Steironema quadriflorum (Sims) Hitchc. 

 leaved Loosestrife. (Fig. 2820.) 



L. quadri flora Sims, Bot. Mag. pi. 660. 1803. 

 L. longifolia Pursh, Fl. Am. Sept. 135. 1814. 

 Steironema longifolium A. Gray, Proc. Am. 



Acad. 12: 63. 1876. 

 Steironema quadriflorum Hitchc. Trans. St. 



Louis Acad. 5: 506. 1891. 



Stem erect, strict, glabrous, simple or little 

 branched, 4-sided, io / -24 / high. Stem-leaves 

 all but the lowest sessile or very nearly so, 

 firm, narrowly linear, i-nerved, the lateral 

 veins obscure, acute or acuminate at both 

 ends, i '-4' long, i^-a^^wide, usually with 

 smaller ones fascicled in the axils, glabrous, 

 the margins slightly revolute; basal leaves 

 oblong or linear-oblong, shorter, slender- 

 petioled, acute or obtuse; peduncles filiform, 

 l /t'-\yz f long; calyx-segments lanceolate, 

 acute, shorter than the cuspidate and 

 slightly erose corolla-segments; flowers 8"- 

 12" broad, often somewhat clustered in 4's 

 at the ends of the branches. 



Along streams and lakes, West Virginia to 

 western New York, Ontario, Kentucky, Iowa and 

 Manitoba. June-July. 



7. NAUMBURGIA Moench, Meth. Suppl. 23. 1802. 



An erect perennial leafy herb, with slender rootstocks, opposite sessile lanceolate en- 

 tire leaves, the lower much smaller or reduced to scales, and small yellow flowers in axil- 

 lary peduncled spike-like racemes or heads. Calyx 5~7-divided, the sepals linear, slightly 

 imbricated. Corolla deeply 5~7-parted, the tube exceedingly short, the segments narrow. 

 Stamens 5-7, exserted; filaments slender, glabrous, slightly united at the base, alternating 

 with as many small tooth -like staminodia at each sinus of the corolla. Ovary globose-ovoid; 

 ovules few or several; style slender, equalling or exceeding the stamens; stigma capitate. 

 Capsule 5-7-valved, few-seeded. Seeds not margined, somewhat angled. 



A monotypic genus of the north temperate zone. 



I. Naumburgia thyrsiflora (L.) Duby. 

 Tufted Loosestrife. (Fig. 2821.) 



Lysimachia thyrsiflora L. Sp. PI. 147. 1753. 

 Naumburgia guttata Moench, Meth. Suppl. 23. 1802. 

 .\anmburgia thyrsiflora Duby, in DC. Prodr. 8: 60. 1844. 



Glabrous or somewhat pubescent; stems simple, erect, 

 often tufted, i-2) high. Leaves 2 / -4 / long, 4 / '-io // 

 wide, the upper lanceolate or oblong-lanceolate, acute 

 or acuminate at the apex, narrowed at the base, the 

 lower smaller, the lowest reduced to ovate scales or 

 these deciduous; peduncles solitary in the axils, rather 

 stout, yt'-\ l /z f long; racemes dense, oblong or ovoid, 

 ]^'~\' long, spike-like; pedicels very short; flowers 

 2 // ~3 // broad; sepals usually spotted; corolla-segments 

 yellow with black spots; style very slender; anthers 

 oblong; capsule globose, black-spotted, when mature 

 slightly longer than the sepals, shorter than the style. 



In swamps, Nova Scotia to Alaska, south to southern 

 New York, Pennsylvania. Missouri and Oregon. Also in 

 Europe and Asia. May-July. 



2 



8. TRIENTALIS L. Sp. PI. 344. 1753. 



Glabrous low perennial herbs, with simple slender erect stems, and lanceolate ovate or 

 oblong leaves mostly clustered in a verticil at the summit. Flowers few or solitary, terminal, 

 slender-peduncled, small, white or pink, deeply 5-9- (mostly 7-) parted. Sepals narrow, per- 

 sistent, spreading. Corolla rotate, its tube almost none, its segments convolute in the bud, 

 acute or acuminate, entire; filaments united into a narrow ring at the base; anthers linear, 

 recurved after anthesis, Staminodia none. Ovary globose; ovules numerous; style filiform. 

 Capsule globose, 5-valved, many-seeded. Seeds trigonous or spherical. [Latin, one-third 

 of a foot, referring to the height of the plant.] 



Two species, of the northern hemisphere. The other occurs in northwestern America. 



