134 LTTHRAC&S. (LOOSESTRIFE FAMILY.) 



2. AMMANNIA, Houston. 



Calyx globular or campanulate, 4-angled, 4-toothed, the sinuses commonly 

 furnished with a small horn-shaped appendage. Petals 4, small, deciduous, 

 sometimes wanting. Stamens 4, short. Stigma capitate. Capsule globular, 

 4-celU'd, many-seeded. — Low smooth annual herbs, with opposite leaves, and 

 solitary or clustered axillary flowers. 



1. A. humilis, Michx. Stem branching from the base ; leaves lanceolate, 

 tapering into a petiole ; flowers solitary ; style very short ; petals 4, purplish. — 

 Varies with the leaves dilated and somewhat cordate at the base, and the lower 

 flowers clustered. (A. ramosior, Miclix.) — Ditches and muddy places, Florida 

 to Mississippi, and northward. August and Septeml>cr. — Stem 6'- 12' high. 



2. A. OCCidentalis, DC Stem nearly simple, ascending, rooting at the 

 base ; leaves lanceolate, narrowed into a petiole ; flowers solitary, apctalous ; 

 calyx 8-toothed. 



Var. pygmaea. Stem very short (£'-1' long); sinuses of the calyx ap- 

 pendaged, emarginate, as long as the teeth; style short. — Key West, Dr. 

 Blodyett. — Leaves obtuse. Stem 1 - 6-flowercd. 



3. LYTHRUM, L. Loosestrife. 



Calyx cylindrical, striate, 4 - 7 -toothed, usually with minute appendages in the 

 sinuses. Petals 4-7. Stamens as many as the petals, or twice as many, in- 

 serted on the lower part of the calyx, nearly equal. Capsule oblong, 2-celled, 

 many-seeded. — Herbs, with opposite or alternate leaves, and axillary purple or 

 whitish flowers. 



1. L. alatum, Pursh. Smooth; stem and virgate branches 4-angled; 

 leaves lanceolate, acute at both ends, opposite, the uppermost alternate, and 

 shorter than the flowers ; petals and stamens G. — Varies with branches shorter, 

 leaves larger (2' long), broadly lanceolate, sometimes whorled, the uppermost 

 twice as long as the calyx. (L. lanceolatum, Ell.) — Swamps and river-banks, 

 Florida and northward. July - September. — Stem 2° -4° high. Flowers 

 violet-purple. 



2. L. lineare, L. Smooth ; stem 4-angled, much branched ; leaves all 

 opposite, linear; (lowers small, whitish; petals and stamen- 6. — Brackish 

 marshes, Florida and northward. August. — Stem 2° -4° high. Calyx-teeth 

 short. 



4. NESJEA, Commereon. 



Calyx hemispherical or rampanulate, with 4-7 erect teeth, and as many longer 

 and spreading horn-like appendages in the Binnses. Petals 4-7. Stamens 

 twice a- many as the petals. Capsule globose, 3- 4-celled. — Perennial herbs 

 or shrubby plant-, with opposite or whorled leaves, and clustered pcdicelled 

 flowers in their axils. 



I. N. vorticillatn., II I > K Shrubby ; stems pubescent, recurved ; leaves 

 opposite and whorled, lanceolate, tomentose beneath; peduncles .-Lou, j or 



