ABTIFICIAL KEY 10 THE FAMILIES. 67 



Ovary or ovaries free within the perianth. 



1. Stamens on the receptacle. 



A. Ovaiy single. 



i. Leaves all radical; juice of root blood-coloured. , Sanguinaria, 97 

 ii. Stem-leaves opposite. 



Style single Cistus family, 111 



Styles 2 to 5 St. John's-wort family, 90 



iii. Stem-leaves alternate. 



Lamina articulated to the petiole, and covered 



with pellucid dots. Trees Orange family, 152 



Lamina continuous with the petiole, if there be one. 

 Sepals equal. 



Trees Lime-trees, 110 



Herbaceous or undershrubby plants. 



a. Sepals 2, petals 4 Poppy family, 93 



b. Sepals 2, petals 5 Purslane family, 148 



c. Sepals 4, petals 4 Caper family, 164 



d. Sepals and petals each 5 Nigella, 83 



Sepals unequal. 



Petals thin, crumpled, fugitive Cistus family. 111 



Petals thick, smooth, and enduring Camellia, 93 



B. Ovaries 2 to 10. 



Leaves undivided Platystemon, 97 



Leaves much divided. 



Petals flat or concave Pceony, 90 



Petals with curved tails Columbine, 89 



c. Ovaries 12 to 100 or more. 



a. Herbaceous plants. 



Leaves short, very thick and fleshy, in dense 



rosettes of 2 to inches across Houseleek, 127 



Leaves thin, never in dense rosettes Buttercup family, 82 



b. Scrambling weak-stemmed shrubs with pin- 



natifid leaves Clematis, 90 



c. Noble timber trees Magnolia famihj, 97 



2. Stamens on the calyx. 



Ovary solitary. 



Plant nearly stemless Asarum, 349 



Stems conspicuously developed. 

 Herbaceous plants. 



Petals C, or if absent, calyx six-cleft Lythrum family, 207 



Petals very numerous Ice-plant family, 166 



Shrubs and trees. Flowers pentaraerous. 



Calyx only Acacias, 185 



Both calyx and corolla. 

 Calyx fleshy, and adherent to the carpels.. . . Apple famihj, 187 



Ovary quite free Plum family, 190 



Ovaries 6 — 8 to 50—00 or more Pose family, 193 



