134 LYTHRACE^E. (LOOSESTRIFE FAMILY.) 



2. AMMANWTA, 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-celled, many-seeded. Low smooth annual herbs, with opposite leaves, aiul 

 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, Mic/ix.) Ditches and muddy places, Florida 

 to Mississippi, and northward. August and September. Stem 6'- 12' high. 



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

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

 calyx 8-toothed. 



Var. pygmsea. Stem very short ('-!' long); sinuses of the calyx aj>- 

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

 13lodgett. 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 6. 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 ; flowers small, whitish ; petals and stamens 6. Brackish 

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

 short. 



4. NES^A, Commerson. 



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

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

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

 or shrubby plants, with opposite or whorled leaves, and clustered pedicelled 

 flowers in their axils. 



1. N. verticillata, H. B.K. Shrubby ; stems pubescent, recurved ; leaves 

 opposite and whorled, lanceolate, tomentose beneath ; peduncles short, 3 or 



