lo Key to Sub-Classes and Natural Orders. 



PAGE 



14 Sepals 2 deciduous Papaveraceae 22 



14 Sepals 5 persistent, Cistaceae 31 



15 Aquatic plants, .... Nymphaeaceae 22 



15 Land plants, id 



16 Stamens distinct, ....... Tiliaceae 40 



16 Stamens united, '^^^^^^^J...^ ^^'.r^/.c,^ . 



17 Stamens po lyadelphous. .... Hypericaceae 40 



17 Stamens monadelphous, . c^^\ji . — ■^. — Malvaceae 39 

 18 Leaves with stipules, aU^rrrurfk ^^njno., Tkngyfi t^dj ;l.i/,ViolaceaB 32 

 18 Leaves without stipules, 20 



19 Stamens 6, 22 



19 Stamens 3 [Portulacaceae 61] 



19 Stamens 4 — 5 or twice as many, . 23 

 20 Stamens many, ii^.k 1A) qj9^. • • • • Resedaceae 31 

 20 Stamens few, 21 



21 Stamens 6, Fumariaceae 23 



21 Stamens 8, Polygalaceae 32 



21 Stamens 5, Balsaminaceae 44 



22 Stamens tetradynamous, Cruciferae 24 



22 Stamens of equal length, Berberidaceae 21 



23 Leaves with glandular hairs, (. Di.'^y^.d.^Ajj. [Droseraceae 66] 

 ^ 23 Leaves without glandular hairs, 24 



24 S^^ I, 25 



^ 24 Styles 2—5, 27 



25 Stigmas 5 — herbs, 26 



25 Stigmas 2 — trees [Aceraceae 42] 



26 Stamens free, [Ericaceae 96] 



26 Stamens monadelphous, ..... Geraniaceae 42 

 ^.^..^ 27 Nodes swollen — ovary i — 3-celled, . Caryophyllaceae 33 

 rt3v>c chJ- 27 Nodes not swollen— ovary 5-celled, 28 



28 Stamens 4 — 5, Linaceae 39 



28 Stamens 10, . Oxalidaceae 44 



Calyciflorae. 



Calyx and corolla present. Stamens perigynous [or epigyitous), i.e. inserted 

 upon the calyx or upon a disk attached to the calyx. Corolla usually poly- 

 petalous. 



Corolla polypetalous, 29 



Corolla gamopetalous, 30 



