lxvi INTRODUCTION. 



-| 12 f Leaves linear, whorled. Stamen 1. . . . Maeestail Gen. (p. 285.) 



\ Leaves opposite. Stamens 4, 5, or 6 113 



-...of Ovary and capsule one-seeded 114 



\ Ovary and capsule several-seeded 115 



-I14 f Leaves small, with scarious stipules . . Paronychia Fam. (p. 685.) 



I No stipules Goosepoot Fam. (p. 690.) 



-.-.K J Ovary inferior. Stamens 4 Ludwigia Gen. (p. 281.) 



\ Ovary superior 116 



'Calyx 6-toothed. Stamens 6. Capsule 2-celled. Peplis Gen. (p. 289.) 

 Calyx five-lobed. Stamens 5. Capsule one-celled, several-seeded. 



Glaux Gen. (p. 544.) 

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

 seeded Pink Fam. (p. 100.) 



f Flowers glumaceous, consisting of chaffy scales alternating with each 

 other, enclosing the stamens. Leaves linear. Stamens 2 or 3 . 165 

 117 <J Perianth entire, oblique, projecting on one side into a lip. Stamens 6 



Aristolochia Fam. (p. 726.) 



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



-..J Two or more ovaries Eose Fam. (p. 234.) 



\ A single ovary 119 



-j-jq J Perianth of 4 or 5 parts or teeth. Stamens usually 4 or 5 . . .120 



\ Perianth of 6 divisions. Stamens 6 124 



, 20 f Ovary inferior Thesium Gen. (p. 724.) 



\ Ovary superior 121 



121 I ^ ee ^ s seYera l m the capsule Plantain Gen. (p. 681.) 



\ Seeds solitary 122 



f Stipules leafy. Leaves broadly lobed or divided . Eose Fam. (p. 234.) 



122 <j Stipules membranous, sheathing the stem . Polygonum Fam. (p. 705.) 



(^Stipules minute or none 123 



123 i Stamens 4 Pellitory Gen. (p. 743.) 



1 Stamens 5 Goosefoot Fam. (p. 690.) 



f Stem leafy. Stipules sheathing. Nut enclosed in three of the pe- 



124 «{ rianth-lobes Docs Gen. (p. 706.) 



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

 f Stamens and pistils in distinct globular or cylindrical masses without 



: perianths 166 



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



Spurge Gen. (p. 727.) 

 L Flowers, male or female, each with a distinct perianth 126 



{Stems long and climbing 127 

 Stems parasitical on trees, with hard green forked branches. 

 Mistletoe Gen. (p. 375.) 

 Stems terrestrial or aquatic, but neither climbing nor floating . . . 129 

 f Leaves opposite. Capsules in a head concealed by leafy bracts. 

 127 «{ Hop Gen. (p. 744.) 

 l_Leaves alternate. Berries red 128 



{Leaves angular or lobed. Stem climbing by tendrils. Perianth 5-lobed. 

 Bryony Gen. (p. 290.) 

 Leaves entire, shining. Stem twining, without tendrils. Perianth 6-lobed. 

 Tamus Gen. (p. 841.) 

 f Flowers glumaceous, consisting of chaffy scales enclosing the stamens 165 

 129 < Flowers of both sorts, or at least the males, with a distinct perianth, 



L of 3, 4, or more divisions 130 



^3q| Male and female flowers on the same plant 132 



\ Male and female flowers on separate plants 131 



