XIV ANALYTICAL KEY. 



Bracts herbaceous or none : no stipules. . Chexopodiace^:, 65 



Stipules Bcarioos Illecebraceje, 63 



Fruit a more or less triangular akene : embryo curved. 



Flowers perfect, on jointed pedicels, involucrate. Polygonace.e, 66 

 Akene not triangular: embryo straight. 

 Flowers unisexual : filaments incurved in bud : leaves 



simple Ueticace^:, 73 



Submerged : flowers axillary, naked : leaves sessile, 



filiformly dissected Ceratophyllace^:, 72 



Carpels several and distinct, 1 to several-ovuled : calyx 



usually corolla-like. .... Rahitncdlacejb, 1 



2. As in (1), but ovary and fruit enclosed by the calyx and apparently inferior. 



Shrubs, with scurfy opposite entire leaves : flowers dioecious : 



fruit baccate. Eljeagxace^:, 67 



Herbs : calyx corolla-like : fruit an akene. 

 Leaves simple, opposite, entire, without stipules: flowers 



involucrate Nyctagixace^e, 62 



Leaves compound, alternate, stipulate Rosacea, 26 



3. Ovary and fruit superior, of 2 or more carpels. 



Fruit 2 to 4-celled, usually lobed : cells 1 to 2-ovuled. 



Capsule 3-celled, 3-lobed : juice milky : mostly herbaceous. 



EUPHORBIA.CE.E, 70 



Fruit 4-celled, 4-lobed, compressed, indehiscent : styles 2 : 



small aquatic, with opposite entire leaves. Callitriciiace.e, 71 



Fruit fleshy, 3-celled, 3-lobed : shrubs with alternate simple 



leaves Riiamxace.e, 21 



Fruit a double samara : trees with opposite pinnate leaves. S apixdace.e, 23 

 Cruciferous herb : pod small, obcompressed. Lepidium, in Crucifer^e, 6 

 Fruit capsular, 1 -celled or more, several-ovuled : low herbs 

 with opposite leaves. 



Capsule 3 to 5-celled : succulent Ficoide^e, 35 



Capsule 1 -celled : placentae central. 



Style and stigma 1 : stamens alternate with the sepals. 



Glaux, in Primulace^e, 46 

 Styles or stigmas 3 or more : stamens opposite the 

 sepals . . . Caryophyllace.e, 11 



4. Ovary and fruit inferior. 



Fruit many-seeded: capsule (f inferior) 1 -celled: leaves 



cordate Saxifragace^, 27 



Fruit mostly 1 -seeded. 

 Flowers perfect : fruit nut-like : herbs with alternate entire 



leaves Saxtalace.e, 69 



Dioecious parasites on trees, with opposite leaves and jointed 



stems : berry with glutinous pulp. . . . Loraxthace.e, 68 

 Aquatic herbs, with opposite or verticillate leaves. Halorage.e, 29 



