42 ANALYTICAL KEY. 



("Aquatic plant, with floating orbicular leaves. Limnanth Gen. (p. 369.) 

 -/.J TwiuLag or procumbent plants. Corolla campanulate. Seeds 2 or 



I 4 in each capsule CONTOLTULUS Fam. (p. 370.) 



LTaU erect plants. Seeds numerous 77 



rCoroUa nearly rotate, the upper lobes overlapping the lower ones. 



_ J Mtjllein Gen. (p. 390.) 



I Corolla campanulate, or with a distinct tube, the lobes folded in the 



L bud SoLAirgM Fam. (p. 382.) 



'Stamens 8 or 10, more or less united 79 



Stamens 5, free 77 



78 ■{ Stamens 3. Small plant with minute white flowers. 



1 MONTIA Qen. (p. 216.) 



^Stamens 2 or 4 ...*...... 80 



f.„ r Leaves simple Milkwort 6'eH. (p. 150.) 



\ Leaves of three leaflets Clotee Ge??. (p. 164.) 



j^Q J Corolla with a spm- 81 



\ CoroUa without a spur 82 



„, r Two stamens. Capsule one-ceUed . . Pinguicttla Fam. (p. 358.) 

 [ Four stamens. Capsule two-celled . Sceophulaeia Fam. (p. 389.) 

 rOne or two seeds in the ovary or capsule . . Veetein Gen. (p. 430.) 



82 "I Sevei'al seeds in the capsule, or at least several ovules in the 



L ovaiy 83 



r Plant leafless, except scales of the colour of the stem. Capsule 



„„ < one-celled Beoomeape Fam. (p. 385.) 



L Leaves green. Capsule two-celled . . Sceophulaeia Fam. (p. 389.) 



Perianth simple or none. 



rrioating or submerged plants 84 



„ , J Terrestrial herbs, or, if aquatic, erect from the bottom of the 



I water, and projecting from it 92 



i_Trees or shrubs 137 



1. Floating Aquatic Plants. 



r Small leaf-hke fronds, attached two or three together, and float- 

 85 < iug without any stem Duckweed Gen. (p. 488.) 



[ Leaves and flowers growing out of a distinct stem 86 



an J Leaves deeply divided into capillary lobes 87 



L Leaves entire . 88 



TLeaves pinnately divided. Perianth 4-lobed. 

 g« J Myeiophtll Gen. (p. 211.) 



I Leaves repeatedly forked. Perianth none or many-lobed. 



L Ceeatophtll Gen. (p. 463.) 



fLeaves opposite or whorled 89 



„„ J Leaves iu a radical submerged tuft 134 



] Leaves radical ui floating tufts Feogbit Gen. (p. 499.) 



^Leaves alternate 91 



{Tube of the flower long and thread-like, resembling a pedicel. 

 Elodea Gen. (p. 499.) 

 Flowers sessile, or nearly so, in the axils of the leaves, or in 

 stalked heads or spikes, without any stalk-like tube .... 90 

 C One four-lobed ovary. Two styles . . . Cailiteiche Gen. (p. 463.) 

 90-^ Four ovaries, with distinct styles or stigmas . Naiad Fam. (p. 489.) 

 L One simple ovary and style Maeestail Oen. (p. 212.) 



