ARTIFICIAL KEY TO THE FAMILIES. Iv 



fleshy or 0, never scarious ; flowers sometimes sunk 

 in the nodes of a jointed rhachis, rarely bracteate, 

 very rarely both bracteate and 2 bracteolate ; 

 anthers 2-celled ; leaves alternate or 0, often fleshy, 



sometimes terete CXIX. CHENOPODIACEAE. 



Leaves stipulate ; stipules usually connate in a tube 

 around the nodes, persistent or rarely deciduous and 

 leaving a circular scar ; perianth membranous, often 

 coloured, segments 3-6, connate or free ; herbs or shrubs, 



sometimes climbing CXX. POLYGONACEAE. 



Seeds without albumen ; or if albuminous, then embryo 

 straight : 



Aquatic, usually annual herbs, closely attached to 

 submerged rocks ; flowers bisexual, regular, 3-merous 

 with a perianth, or irregular, 2-merous and devoid of 



perianth CXXI. PODOSTEMONACEAE. 



Terrestrial trees, shrubs or climbers ; perianth always 

 present : 



Perianth-tube narrowed above the ovary, subcorolline, 

 base persistent, upper part deciduous, lobes 4, short, 

 valvate ; stamens 4, alternate with the lobes ; ovary 

 1 -celled ; ovule 1, erect ; trees or shrubs with silvery 



or stellate scales CXXX. ELAEAGNACEAE. 



Perianth-tube not narrowed above the ovary, lobes 

 rather long ; stamens as many as and opposite the 

 perianth-lobes, or twice, rarely thrice as many ; ovary 

 1 -celled ; or if 2-celled, then with a ring of connate 

 scales above the stamens : 



Perianth-lobes 4, valvate, revolute in open flower ; 

 stamens 4 in 1 series ; anthers opening by slits ; 

 ovules 2, basal or lateral, ascending 



CXXVIII. PROTEACEAE. 



Perianth-lobes 4 or 6, imbricate ; stamens often in 

 2, less often in 3 or 4 series ; ovules pendulous : 

 Perianth-tube very short, lobes 4 or 6, 2-seriate ; 

 stamens in 2-4-series, usually accompanied by 

 glands ; anthers 2- or 4-celled, opening by as 

 many upcurved, valvular lids ; shrubs or trees, 

 rarely parasitic, twining herbs 



CXXVI. LAURACEAE. 



Perianth-tube rather long ; lobes 4-5, 1 -seriate ; 

 stamens not accompanied by glands ; anthers 



