INtRODUCflOtf. 



/ Leaves radical, or in a single whorl on the stem . , ,99 



\ 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). 



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



CHRYSOSPLENIUM (p. 170). 

 Leaves entire. Capsule several-seeded CARYOPHYLLACE.E (p. 58). 



L Leaves entire. Capsule 1-seeded 101 



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

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

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

 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 style .... 104 



Leaves opposite or in whorls 105 



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 UMBELLIFERJB (p. 174). 



Leaves entire 108 



Stipules forming sheaths or rings round the stems. Nut 



superior, 1-seeded POLYGONACEJS (p. 379). 



No stipules 109 



Stamens and divisions of the flower 4 or 6 . . . . 110 

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



parallel veins 154 



Styles 5. Ovary and capsule superior PLUMBAGINE^J (p. 363). 

 Styles 2. Ovary inferior .... UMBELLIPER^B 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 



lor 2 SALICORNIA (p. 371). 



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

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



- 13 f Ovary and capsule 1-seeded 114 



\Ovary and capsule several-seeded 115 



.- ./Leaves small, with scarious stipules ILLEOEBRACEJE (p. 368). 



1 V No stipules CHENOPODIACE^ (p. 370). 



'Ovary inferior. Stamens 4 ... LUDWIGIA (p. 153). 

 ,0vary superior .......... 116 



