KEY TO THE FAMILIES. 11. 



49. Leaves exstipulate. Stigmas 2. (Myrica). 



30 MYRICACEAE. 

 Leaves stipulate, rarely exstipulate and then stigma 1. SO. 



50. Juice milky. Trees. 32 MORACEAE. 

 Juice not milky. Herbs and shrubs. 33 URTICACEAE. 



51. Ovule incurved. Embryo curved. 52. 

 Ovule inverted. Embryo straight or nearly so. 54. 



52. Perianth with valvate and folded aestivation, lobed. 

 Base of perianth enlarged in the fruit, enclosing the nut. 

 Flowers usually rather conspicuous. 41 NYCTAGINACEAE. 

 Perianth not with varvate and folded aestivation, etc. 



Flowers inconspicuous. S3. 



53. Perianth more or less scarious or papery. Flowers with 



bracteoles. 40 AMARANTACEAE. 



Perianth more or less herbaceous or membraneous. Stigmas 



2— S. 39 CHENOPODIACEAE. 



54- Leaves stipulate. 67 ROSACEAE. 



Leaves exstipulate. 55 



55. Stamens 4, attached to the perianth segments. 



34 PROTEACEAE. 



Stamens 5-15 free from perianth. Filaments united at the 



base. (Pisonia) 41 NYCTAGINACEAE. 



56. (46) Ovule straight. 57. 

 Ovule incurved or inverted. 58. 



57. Perianth 4 parted. Stamens 4. Trees or shrubs. 



34 PROTEACEAE. 



58. Leaves stipulate. 59. 

 Leaves exstipulate. 61. 



59. Anthers 3-4 celled. (Macaranga). 80 EUPHORBIACEAE. 



Anthers 2 celled. 60. 



60. Shrubs or trees. Juice not milky. 31 ULMACEAE. 

 Figs with milky juice (Ficus) or herbs. 32 MORACEAE. 



61. Anthers opening by valves. Perianth segments 4 or 6. 

 Seed exendospermic. Trees or shrubs. 52 LAURACEAE. 

 Anthers opening by longitudinal slits. 62. 



62. Stamens numerous. Flowers unisexual. (Xymalos.) 



57 MON1MIACEAE. 

 Stamens 8 — 10. Flowers hermaphrodite. 



106 THYMELAEACEAE. 



63 (45) Ovules basal or inserted on a central placenta. 64. 



Ovules suspended from apex of cell or parietal. 67. 



64. Perianth of 2 — 3 minute scales. 



(Sphaerothylax) 58 PODOSTEMONACEAE. 



Perianth of 4 — 5 segments. 65. 



65. Leaves alternate. Stamens 5. 40 AMARANTACEAE. 

 Leaves opposite or whorled. 66. 



