PRIM ULA CEAE. ?1 7 



1. Steironema ciliatum (L.) Raf. Fringed Loosestrife. (I. F. f. 2816.) 



Stems mostly glabrous, 3-12 dm. high. Leaves acute or acuminate at the apex, 

 obtuse, truncate or cordate at the base, 5 -15 cm. long, the margins ciliolate; pedun- 

 cles 1-5 cm. long; calyx-segments lanceolate, shorter than the erose-denticulate 

 commonly mucronate corolla-segments; flowers 1.5-2.5 cm. broad. In moist 

 thickets, N. S. to Br. Col., Ga., Ala., Kans. and Ariz. June- Aug. 



2. Steironema tonsum (Wood) Bicknell. Southern Loosestrife. (I. F. 

 f. 2817.) Stem 3-6 dm. high, obtusely 4-angled, minutely glandular-puberulent 

 above. Leaves 5-8 cm. long, acute at the apex, obtuse or subcordate at the base, 

 ciliolate. the upper much smaller; panicle open, leafy; pedicels 2-6 times as long 

 as the flowers; calyx-segments lanceolate, very acute; corolla 1.8-2 cm. broad, its 

 segments cuspidate. On dry rocks, Va. to Ky., Tenn. and Ala. June-July. 



3. Steironema radicans (Hook.) A. Gray. Trailing Loosestrife. (I. F. 

 f. 2818.) Stem soon decumbent or reclined, slender, glabrous, 3-9 dm. long. 

 Leaves acute or acuminate, 2-iocm. long; peduncles 1-5 cm. long; calyx-segments 

 ovate or lanceolate, acuminate, about equalling the erose-denticulate corolla- 

 segments; capsule about one-half as long as the calyx. In swamps, Va. and W. Va. 

 to Ark. and La. June-Aug. 



4. Steironema lanceolatum (Walt.) A. Gray. Lance-leaved Loosestrife. 

 (I. F. f. 2819.) Stem erect, glabrous, 1.5-9 dm. high. Leaves lanceolate, linear 

 or oblong-lanceolate, petioled or nearly sessile, acute or acuminate, 2-13 cm. long, 

 the margins naked or ciliate; lower leaves shorter, often oblong or nearly orbicu- 

 lar; petioles naked or ciliate; peduncles 1-4 cm. long; calyx segments lanceolate, 

 acute or acuminate; flowers 1-2 cm. broad; capsule nearly as long as the calyx- 

 segments. In moist soil, Me. to Minn., Fla., La. and Ariz. June-Aug. 



5. Steironema quadriflorum (Sims, Hitchc. Prairie Moneywort. Linear- 

 leaved Loosestrife. (I. F. f. 2820.) Stem erect, strict, glabrous, 4-sided, 2.5-6 

 dm. high. Stem-leaves all but the lowest sessile or very nearly so, I -nerved, acute 

 or acuminate at both ends, 2-10 cm. long. 2-5 mm. wide, usually with smaller ones 

 fascicled in the axils; basal leaves oblong or linear-oblong, shorter, slender-petioled; 

 peduncles filiform; calyx-segments lanceolate, acute, shorter than the cuspidate and 

 slightly erose corolla-segments; flowers 1.5-2.5 cm. broad, often somewhat clustered 

 in 4's at the ends of the branches. Along streams and lakes, W. Va. to western 

 N. Y., Ont., Ky. and Manitoba. June-July. 



7. NAUMBURGIA Moench. 



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

 entire leaves, the lower much smaller or reduced to scales, and small yellow flowers 

 in axillary peduncled spike-like racemes or heads. Calyx 5-7-divided, the sepals 

 linear, slightly imbricated. Corolla deeply 5-7-parted, the tube short, the segments 

 narrow. Stamens 5-7, exserted; filaments slender, glabrous, slightly united at the 

 base, alternating with as many small tooth-like staminodia. Ovary globose -ovoid; 

 ovules few or several; style slender; stigma capitate. Capsule 5-7-valved, few- 

 seeded. Seeds somewhat angled. A monotypic genus. 



1. Naumburgia thyrsiflora (L.) Duby. Tufted Loosestrife. (I. F. f. 

 2821.) Stems simple, erect, 3-8 dm. high. Leaves 5-10 cm. long, the upper lan- 

 ceolate or oblong-lanceolate, acute or acuminate, the lower smaller; peduncles soli- 

 tary in the axils; racemes 1-2.5 cm - l° n g> spike-like; pedicels very short; flowers 

 4-6 mm. broad; corolla-segments yellow with black spots; anthers oblong; capsule 

 globose, black-spotted, when mature slightly longer than the sepals. In swamps, 

 N. S. to Alaska, N. Y., Penn., Mo. and Ore. Also in Europe and Asia. May-July. 



8. TRIENTALIS L. 

 Glabrous low perennial herbs, with simple erect stems, and 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, 

 persistent, spreading. Corolla rotate, its tube almost none, its segments acute or 

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

 recurved after anthesis. Staminodia none. Ovary glolx>se; ovules numerous; style 

 filiform. Capsule globose, 5-valved. [Latin, one-third of a foot, referring to the 

 height of the plant.] About 4 species, of the northern hemisphere. 



