KEY AND FLORA 



Monoecious, androgynous ; catkins short, erect, with 1 flower under 

 each scale of the fertile catkin ; fruit a round nutlet 



(Myricaceae), Wax-myrtle Family, p. 40 



Monoecious, sterile flowers only in catkins ; fruit a nut in a cup or bur, 

 or a leaf-like cylindrical sheath 



(Cupuliferse), Oak Family, p. 44 



Dioecious, sterile flowers with calyx -i-parted, stamens 4 ; fertile flowers 

 Avith calyx 2-lobed or wanting, ovary 1-celled, 2-ovuled, styles 2 ; 

 fruit a berry (Garryacese), Silk-tassel Bush Family, p. 120 



Flowers not in catkins. 

 Ovary inferior, 

 6-celled, perianth regular and 3-lobed or irregular, stamens 6-12 

 (Aristolochiacese), Dutchman's Pipe Family, p. 40 



l-celled, sunk in the axis of the conical spike, which has numerous 

 flowers, and a persistent petal-like involucre ; flowers naked, of 

 6-8 stamens and 3-6 pistils, each subtended by a white bract. 

 Aromatic hei-bs of wet alkaline places 



(Houttuynia), Yerba Mansa, p. 40 



Ovary superior, 

 3-celled, 3-ovuled, stigmas 3-6. Monoecious or dioecious. Staminate 

 flowers with 1 to many stamens. Plants with milky juice 



(Euphorbiacese), Spurge Family, p. 99 



l-celled, forming a 3-sided akene, stamens 9, perianth of 6 divisions 

 usually colored like a corolla 



(Polygonacese), Buckwheat Family, p. 47 



l-celled, forming a flat akene with embryo coiled, stamens 5 opposite 

 the divisions of the green perianth ; plants often fleshy and covered 

 with scurf . . (Clienopodiacese), Pigweed Family, p. 49 



Similar to Chenopodiacese, but the divisions of the perianth are 

 papery and persistent with similar bracts 



(Amarantaceae), Amaranth Family, p. 51 



l-celled, l-seeded, calyx corolla-like, monosepalous, the persistent 

 herbaceous base hardening around the akene, style 1 ; flowers in 

 calyx-like involucres 



(Nyctaginacefe), Four-o'clock Family, p. 51 



Stamens 9 in 3 rows, anthers 4-celled, opening by uplifted valves ; 

 sepals 6, petaloid, pistil simple ; flowers in umbels ; trees with 

 aromatic foliage . . . (Lauracese), Laurel Family, p. 63 



Division II. Polypetal^e. Petals distinct (in some genera wanting). 

 Stamens hypogynous (on the receptacle below the superior ovary). 



