KEY TO THE FAMILIES. 



MONOCOTYLEDONOUS OR ENDOGENOUS PLANTS. 

 Ovary superior, naked flowers unisexual, on spathaceous spadices. 



Flowers dioecious, in heads or spikes, leaves elongate, prickly at the edges. 



Pandanaceae 96 



Ovary superior, syncarpous, 3-celled, perianth of 6 segments in 2 series. 

 Perianth regular, wholly corolla-like, cells of ovary 2 to many ovulats. 



Liliaceae 109 



Perianth small, calyx-like, fruit drupaceous or baccate, 1-seeded, leaves palm- 

 ate or pinnate, flowers on a branching spadix Palmae 99 



DICOTYLEDONOUS OR EXOGENOUS PLANTS. 



I. Perianth simple or none. 



Ovary of 3 or rarely 2 or more than 3 united carpels, with 1 or 2 pendu- 

 lous ovules in each. 



Fruit either capsular, separating into as many 2 valved cocci as 



carpels, or succulent and indehiscent Euphorbiaceae 243 



Ovary free with one ovule, styles 2 or rarely 1. 

 Ovule anatropous or amphitropous. 



Fruit indehiscent nut or drupe-like, one seeded.... Ulmaceae 113 



Fruit small, drupe-like, milksap present, leaves with 2 axillary 



stipules Moraceae 114 



Ovule orthotropous. 



Polycarpium or drupe often enclosed by and united with 



the perianth; usually without milksap Urticaceae 117 



Ovary 1-celled with few ovules, seed single. 



Perianth partly adnate to maturing ovary, ovules 1-3. 



Santalaceae 126 



Ovary 1-celled with a single ovule; embryo curved. 



Perianth dry, supported by 3 bractlets : stamens connate at the 



base, as many as perianth segments Amarantaceae 135 



Perianth tube persistent around the fruit, stamens not of the 



same number as lobes of perianth, hypogynous.. Nyctaginaceae 143 

 Ovary one-celled, free, with a single ovule, embryo not curved. 



Perianth segments 6 in 2 circles, persistent; fruit a one seeded 



berry or drupe Lauraceae 149 



Perianth segments 4, stamens twice as many, sessile in 2 alter- 

 nate rows, fruit a drupe-like reddish berry Thymelaeaceae 315 



II. Petals united, at least at the base. 



Corolla epigynous, regular. 



Ovary 2- or more celled, stamens adnate to the corolla, as many as 



corolla lobes; leaves opposite Rubiaceae 429 



Ovary 1 celled, 1-ovulate; stamens adnate, as many as corolla lobes. 



Compositae 497 



Corolla epigynous, irregular. 



Stamens 5, filaments and anthers connate, the latter bearded at the 



top; milk sap present Campanulaceae 469 



Lobelioideae 



Stamens free, stigma surrounded by a hairy indnsium. .. Goodeniaceae 494 

 Corolla hypogynous or perigynous, bearing the stamens, regular. 

 Ovarv 3 or more celled; 1 or 2 ovules in each cell. 



Stamens 5, alternate w r ith corolla lobes; a single ovule in each 



cell Eracridaceac 365 



Stamens indefinite; flowers unisexual Ebenaceae 393 



Stamens 5-6. opposite the corolla lobes when of =ome number, 

 often alternating with staminiodia; milky sap present. 



Sapotaceae 380 



Ovarv 1-celled, with a free central placenta. 



Stamens opposite the corolla lobes; drupp with a single hasilar 



seed Myrsinaceae 367 



