ANALYTICAL KEY. IXXf 



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

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



116-J seeded GLAUX (p. 292). 



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



several-seeded .... CAHYOPHYLLACEJE (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 ..... ARISTOLOCHIACEJE (p. 389). 

 .Perianth 4-, 5-, or 6-merous. Stamen* 4, 5, or 6 . . .118 



llg f Two or more ovaries ROSACES (p. 127). 



\A single ovary' 119 



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



\Perianth of 6 divisions. Stamens 6 124 



12 o/ Ovary inferior THESIUM (p. 389). 



\0vary superior 121 



117 



121 

 122 

 123 



124 



125 



126 

 127 



128 



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



Seeds solitary 122 



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

 Stipules membranous, sheathing the stem POLYQONACE^J (p. 379). 



Stipules minute or none 123 



Stamens 4 PARIETARIA (p. 400). 



Stamens 5 . . . . . . CHENOPODIACE^E (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 . . . . '. . . 16d 

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



EUPHORBIA (p. 391). 

 Flowers, male or female, each with a distinct perianth . .128 



Stems long and climbing 127 



Stems parasitical on trees with hard green forked branches. 



VISCUM (p. 204). 



Stems 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 



6-lobed BRYONIA (p. 157). 



Leaves entire, shining. Stem twining, without tendrils. 



Perianth 6-lobed TAMUS (p. 465). 



. o . Male and female flowers on the same plant .... 131 

 12y \Male and female flowers on different plants . . . .139 



{Flowers glumaceous, consisting of chaffy scales enclosing 

 the stamens 1 65 

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

 perianth of 3, 4, or more divisions 129 



18 f Male perianth-of 3 to 5 divisions 132 



\Maleperianthof6divisions 138 



tan/Stamens as many as the divisions of the perianth . . .133 

 iw I Stamens indefinite .... . 137 



