186 KEY AND FLORA 



shorter than the calyx. Stamens 5, perigynous, not protrud- 

 ing from the tube of the corolla. Capsule 5-valved, few-many- 

 seeded. 



1. A. occidentahs Pursh. Annual, smooth or nearly so. Scapes 

 usually clustered, 1-3 m. high, erect or ascending. Lobes of the 

 calyx becoming leafy. Corolla white, shorter than the calyx. In dry 

 soil W. 



III. LYSIMACHIA L. 



Perennials, with opposite or whorled entire leaves, which 

 are often dotted. Calyx 5-6-parted. Corolla wheel-shaped, 

 with its divisions commonly nearly separate. Stamens gener- 

 ally somewhat monadelphous at the base. 



B. PL species 4 (Naumburgla). 



1. L. quadrifolia L. Four-Leaved Loosestrife. Stem erect and 

 simple, 1-2 ft. high, hairy. Leaves whorled, most frequently in fours,, 

 broadly lanceolate. Flowers small, axillary, and solitary, on long and 

 slender peduncles. Damp or sandy soil. 



2. L. terrestris BSP. Bulb-Bearing Loosestrife. Stems 1-2 ft. 

 high, finally branching, frequently producing bulblets in the leaf 

 axils after flowering. Leaves abundant, generally opposite, narrowly 

 lanceolate. Flowers small, pediceled, in a long, terminal raceme. 

 Low or swampy ground. 



3. L. Nummularia L. Moneywort. Stems creeping, smooth. 

 Leaves small, round or nearly so. Flowers solitary in the leaf axils, 

 yellow, i-1 in. in diameter. Cultivated and escaping into moist 

 ground. Introduced from Europe. 



4. L. thyrsiflora L. Tufted Loosestrife. Stem simple, erect,. 

 1-2 ft. high. Leaves all opposite and lanceolate except the lower 

 ones. Racemes spike-like, 1 in. or less long, borne in the leaf axils 

 near the middle of the stem. Flowers small, light yellow with black 

 spots. In swamps. 



IV. STEIRONEMA Raf. 



Perennial herbs. Leaves opposite or whorled, simple, entire. 

 Flowers yellow, axillary or racemose, on slender peduncles. 

 Calyx tube 5-parted, persistent. Corolla 5-parted, wheel-shaped, 

 tube very short or none, the lobes denticulate at the apex, and 

 in the bud each one inclosing a stamen. Stamens 5, distinct 

 or slightly united at the base ; sterile rudiments often alter- 

 nating with them. Ovary globose ; style slender. Fruit a glo- 

 bose, 5-valved, few- or many-seeded capsule."* 



