666. Flowers all with a perianth, often imbricated with 

 bracts 607 



The pistillate flowers consisting of a naked, 2-styled 

 ovary, placed between two leafy bracts, which might be 

 mistaken for a perianth. The staminate flowei-s furnished 

 with a 5-sepalled perianth, also with a rudimentaiy pistil. 

 Fruit an utricle. Herbs scurfy. Leaves triangular, or hal- 

 berd-shaped. Atriplex hastata, L. (826). 



667. Perianth 4-lobed. Stamens 4. Stigma sessile, 

 tufted. Leaves chiefly alternate. Many of the (generally 

 monoecious) flowere perfect. Achenium polished. 



Farietaria Fennsylvanica, Muhl. (831). 



Perianth of 5 sepals, silvery-white, as are the 

 bracts. Stamens 5, with 1-celled anthers. Stigmas 2 or 3. 

 Leaves opposite, petioled. Utricle roundish-ovate, enclosed 

 in the perianth. Iresine celosioides, L. (896). 



668. Perianth 4-tootlied, with the sinuses appendiculate, 

 or 4-sepalled, with the two outer sepals smaller. Stamens 4 

 or 6. Low herbs 669 



Perianth of 4 or 5 equal, or not appendiculate seg- 

 ments, or sepals 670 



669. Galyx globular, or bell-shaped, 4-angled, 4-toothed, 

 with a little horn-like appendage at each sinus (corolla want- 

 ing). Style 1. Stamens 4. . Fruit a j)od. Leaves narrow, 

 opposite. Flowers small, greenish, axillary, solitary, or 3 

 together. Stem branched. 0-^'^) Ammannia. 



Perianth 4-sepalled, the 2 inner sepals broader, 

 erect, the 2 outer smaller and spreading, or reflexed. Ache- 

 nium lens-shaped, girt with a broad wing. Stigmas 2, ses- 

 sile, tufted. Stamens 6. Low acaulescent herbs. Leaves 

 kidney-form, long-petioled. Flowers racemed, or somewhat 

 panicled. (85) Oxyria digyna, Campd. 



[0. reniformis, Hook.) 



670. Stamens 1-5, all fertile '. 671 



Stamens 6-12, the alternate ones often sterile. .684 



671. Perianth 4-parted or sepalled 672 



Perianth 5- (rarely 4-) toothed, cleft, parted or 



sepalled 675 



