INTRODUCTION. 



f Leaves radical, or in a single whorl on the stem . . . . 95 



\ Leaves alternate or opposite 100 



Leaves once or twice ternately divided. Flowers in a small 



terminal head ADOXA (p. 206). 



Leaves entire, rush-like, radical. Flowers in a terminal 



umbel. Plant aquatic BUTOMUS (p. 431), 



Leaves entire, in a single whorl of four or five. Flowers 

 solitary, terminal PARIS (p. 456). 



J Leaves orbicular, crenate. Capsule inferior, many-seeded. 

 CHRYSOSPLENIUM (p. 170). 

 I Leaves entire. Capsule several-seeded CABYOPHYLLACE^: (p. 58). 

 [.Leaves entire. Capsule 1-seeded ...... 101 



/Leaves small, opposite. Capsule inferior SCLERANTHUS (p. 370). 

 01 \Leaves alternate, with sheathing stipules POLYGONUM (p. 383). 

 Perianth coloured, and looking like a corolla .... 103 



102 Perianth herbaceous, and looking like a calyx or scales, or 



entirely wanting Ill 



One or two anthers sessile on a central column or style. One 

 . - of the six divisions of the perianth different from the others. 



ORCHIDACE^E (p. 435). 



Three to six stamens distinct from the stylo . . . .104 

 .. Leaves opposite or in whorls 105 



105 



100 



107 



108 



109 



110 



Leaves alternate or radical 107 



Stamens 6. Capsule 2-celled, with several seeds PEPLIS (p. 156). 

 Stamens 5 or fewer. Ovary inferior. . . . . .54 



Stamens 5. Ovary superior 106 



Capsule 1-seeded. Stipules small, scarious ILLECEBRACE.E (p. 368). 

 Capsules several-seeded, 1-celled. No stipules GLAUX (p. 292). 

 Leaves pinnate, with stipules . . . SANGUISORBA (p. 140). 

 Leaves pinnate or divided, without stipules UIIBELLIFER^: (p. 174). 



Leaves entire 108 



Stipules forming sheaths or rings round the stems. Nut 



superior, 1-seeded POLYGONACE^B (p. 379). 



No stipules 109 



Stamens and divisions of the flower 4 or 5 110 



Stamens and divisions of the flower 3 or 6. Leaves with 



parallel veins 1 64 



Styles 5. Ovary and capsule superior PLUMBAOINE^E (p. 363). 

 Styles 2. Ovary inferior . . . . UMBELLIFER.* p. 174). 



Style 1. Ovary inferior. THESIUM (p. 389). 



Leaves opposite or whorled . . , . . . .112 



... Leaves alternate or radical 117' 



Fleshy, articulate, maritime plants, without leaves. Stamens 

 1 or 2 SALICORNIA (p. 371). 



.. /Leaves linear, whorled. Stamen 1 . . HIPPUUIS (p. 174). 

 \Leavesopposite. Stamens 4, 5, or 6 113 



Ijo/Ovary and capsule 1-seeded 114 



\Ovary and capsule several-seeded 115 



.../Leaves small, with scarious stipules ILLECEBKAOE.E (p. 368). 

 \.No stipules CHENOPODIACE- (p. 370). 



..../Ovary inferior. Stamens 4 ... LUDWIG.IA (p. 153). 



ll \0vary superior llfl 



