ANALYTICAL KEY. 



'Calyx 6-toothed. Stamens 6. Oapsnle 2-celled PEPLIS p. (156). 

 Calyx 5-lobed. Stamens 5. Capsule 1-celled, several- 



seeded GLAUX (p. 292). 



Calyx of 4 or 5 sepals. Stamens 4 or 6. Capsule 1-celled 



several- seeded .... CAicropHYLLACEJE (p. 58). 

 'Flowers glumaceous, consisting of chaffy scales alternating 

 with each other, enclosing the stamens. Leaves linear. 



Stamens 2 or 3 165 



Perianth entire, oblique, projecting on one side into a lip. Sta- 

 mens 6 ....... ABISTOLOCHIACEJE (p. 389). 



.Perianth 4-, 5-, or 6-merous. Stamens 4, 5, or 6 . . .118 



118 f Two or more ovaries ROSACE^ (p. 127). 



\A single ovary 119 



119 / Perianth of 4 or 5 parts or teeth. Stamens usually 4 or 6 . 120 

 \Perianthof6divisions. Stamens 6 124 



122 

 123 



124 



125.1 



Ovary superior 121 



Seeds several in the capsule . . . PLANTAGO (p. 366). 



Seeds solitary . . . 122 



Stipules leafy. Leaves broadly lobed or divided ROSACES (p. 1 27). 

 Stipules membranous, sheathing the stem POLYGONACE^I (p. 379). 



Stipules minute or none 123 



Stamens 4 PARIETARIA (p. 400). 



Stamens 5 CHENOPODIACEJB (p. 370). 



Stem leafy. Stipules sheathing. Nut enclosed in three of 



the perianth-lobes RUMEX (p. 379). 



Leaves linear, mostly radical. Capsule with 3 or more seeds 161 

 Stamens and pistils in distinct globular or cylindrical masses 



without separate perianths 166 



Stamens about 12, with one pistil in a calyx-like involucre. 



EUPHORBIA (p. 391). 

 N Flowers, male or female, each with a distinct perianth . .126 



f Stems long and climbing 127 



. na I Stems parasitical on trees with hard green forked branches. 



VISCUM (p. 204). 



^Sterns terrestrial or aquatic, but neither climbing nor floating 130 

 Leaves opposite. Capsules in a head concealed by leafy bracts 



HUMULUS (p. 400). 



Leaves alternate. Berries red 128 



Leaves angular or lobed. Stem climbing by tendrils. Perianth 



5-lobed ESTONIA (p. 157). 



Leaves entire, shining. Stem twining, without tendrils. 



127 



128 



Perianth 6-lobed TAMUS (p. 455). 



f'Male and female flowers on the same plant . . . .131 

 129 \Male and female flowers on different plants . . . .139 



?Flowers glumaceous, consisting of chaffy scales enclosing 

 -o J the stamens 165 



j Flowers of both sorts, or at least the males, with a distinct 



V. perianth of 3, 4, or more divisions ..... 129 



1ai / Male perianth of 3 to 5 divisions 132 



91 \Male perianth of 6 divisions . . . ^. . . .138 

 1 09/Stamens as many as the divisions of the perianth , , .133 

 ld/ 1 Stamens indefinite . . . . * .137 



