12 Key to Sub-Classes and Natural Orders. 



47 Stamens, 2, 4, or 8, Land Jlants, ^ l^^^^^^^^^^j^i 9 PAGE 



47 Stamen i or Flowers mon oecious , Water plants, . Haloragaceae 60 



48 Stamens indefinite, Rosaceae 52 



48 Stamens 5 — 10, 49 



49 Petals minute, . • Grossulariaceae 62 



49 Petals conspicuous (a climber), ..... Araliacese 66 



50 Plant less than 6 inches high, . . . Caprifoliaceae 74 



50 A climber, Cucurbitaceae 61 



51 Stamens 4, Cornaceae 74 



51 Stamens 2 or 8, Onagraceae 58 



CDrollI florae. 



Corolla gamopetalous, present as well as the calyx. Stamens usually epi- 

 petalouSy i. e. inserted upon the corolla. 



Ovary inferior, 52 



Ovary superior, 53 ^Jp' \,.i ^ 



52 Stamens epipetalous, ^ I54 



52 Stamens e pi^ SotTs, 55 jjk Vkii riT (xJu-^ f 



53 Stamens hypogynous, Ericaceae 96 



53 Stamens epipetalous, 59 



54 Inflorescence an involucrate capitulum, 56 ksi-AjL . 



54 Inflorescence a cyme, panicle, or umbel, 57 



55 Flowers blue, Campanulaceae 94 



55 Flowers pink, Ericaceae 96 



56 Stamens tetrandrous, "^^f^***^ '^ L- • • Dipsaceae 79 



56 Stamens syngen esious, ^.''^(viyfttw. *^ *^^ Compositae 80 



57 Leaves whorled, Rubiaceae 76 



57 Leaves opposite, 58 



58 Herbs, 61* 



58 Shrubs, Caprifoliaceae 74 



59 Pistil apparently apocarpous, leaves succulent, . [Crassulaceae 63] 

 59 Pistil syncarpous, 60 



60 Style basilar from 4-cleft ovary, 61 ,K<r^ ^^^"^^ cV*'^'tl' 



60 Style terminal or absent, 62 



61 Flowers regular, leaves alternate, . . . Boraginaceae 115 



61 Flowers irregular, leaves opposite, .... Labiatae 109 



61* Flowers regular, .... Caprifoliaceae 74 



61* Flowers irregular, .... Valerianaceae 78 



