38 ANALYTICAL KEY. 



Regular Polypetals loith one free, simple, or compound ovary. 



14 

 15 



16 

 17 

 18 <! 



More than 10 stamens 15 



10 stamens or fewer 21 



Calyx of 2 distinct sepals. Petals 4 ... Poppy Fam. (p. 70.) 

 Calyx of one piece, with 5 or more teeth. Petals 5 or 6. Stamens 



about 12 16 



Calyx of 3 to 5 sepals or lobes. Petals 5. Stamens nmnerous . . 17 

 Calyx of several sepals. Petals and stamens numerous. Aquatic 



plants Wateelilt Fam. (p. 69.) 



Petals distinct. Ovary sessile .... Lttheum Gen. (p. 213.) 

 Apijarent petals really appendages to the involucre. Ovary appa- 

 rently stalked Spurge Gen. (p. 456.) 



^' Leaves opposite 18 



Leaves alternate 19 



Sepals 3, with or without two small outer ones. Style simple. 



CiSTUS Fam. (p. 106.) 

 Sepals 5, nearly equal, Styles 3 or 5, distinct. Htpeeicum Fam. (p. 132.^ 



{Trees or slu-ubs. Stamens free 20 

 Herbs. Stamens free Banebeeet Gen. (p. 67.) 

 Herbs or undershrubs. Stamens united in a column round the 

 pistil Mallow Fam. (p. 138.) 



f Petals and stamens inserted on the receptacle. Flower-stalk winged 



2qJ by an oblong bract LiME Fam. (p. 141.) 



j Petals and stamens inserted on the calyx. Flower-stalk not winged. 

 L EosE Fam. (p. 183.) 

 f Leaves opposite 22 



21 [ Leaves alternate, or radical, or none 29 



f Trees or slirubs 23 



22 1 Herbs 24 



{Stamens 2. Leaves pinnate Ash Gen. (p. 362.) 

 Stamens 4 or 5. Leaves ovate, toothed. . Celasteus Fam. (p. 153.) 

 Stamens about 8. Leaves broadly lobed or angular. Maple Gen. (p. 152.) 

 r Petals inserted on the tubular calyx, near the top. 



24 i Lttheum Fam. (p. 213.) 



[Petals inserted withm the base of the calyx 25 



r Leaves divided, cut, or toothed .... Geeanium Fam. (p. 142.) 



25 I Leaves quite entire 26 



fCapsule one-celled, with a central placenta and several seeds. 



J Pink Fam. (p. 112.) 



26 I Capsule with a single seed Paeoktohia Fam. (p. 217.) 



[_ Capsule and ovary divided into several cells 27 



f Petals 3 or 4, with twice as many stamens. Flowers very minute. 

 Elatine Gen. (p. 131.) 

 Petals 4 or 5. Stamens the same, or rarely one or two additional 

 ones 28 



r Calyx tubular, five-toothed Feankenia Gen. (p. 111.) 



2g < Calyx many-toothed. Flowers very small . Eadiola Gen. (p. 138.) 



[ Sepals 5, quite free Cathartic Flax (p. 137.) 



fTrees or shrubs ' 30 



2g J Low procumbent heath-like undershrub, with 3 petals and stamens. 

 ^ Crowbeeet Ge7i. (p. 462.) 

 Herbs rarely slightly woody at the base 33 



