276 DICECIA. 



2. TRIANDRIA. 



2 EMPETRUM. Barren Fl. Cal. tripartite. Cor. of 3 petals 

 (7 in . B.\ Stam. 3 (9 in E. B.), upon long filaments. 



Fertile Fl. Cal. tripartite. Cor. of 3 petals. Style very 

 short. Stigma with 6 9 rays. Berry superior, globose with 

 6_9 seeds. 



3. Ruscus. Barren Fl. Perianth single, of 6 leaves. Fila- 

 ments united into a tube. Anth. 3 6. 



Fertile Fl. Perianth single, of ft leaves. Nectary tubular. 

 Style 1. Stigma 1. Berry superior, 3-celled. Cells 2-seecled. 

 (Valeriana dioica, TRIAND. Salix triandria, and lanceolata, 

 Ord. DIANDR.) 



3. TETRANDRIA. 



5. MYRICA. Barren FL Scales of the calkin concave. Pe- 

 rianth 0. 



Fertile Fl. Scales of the catkin concave. Perianth 0. 

 Styles 2. Drupe 1 -celled, 1 -seeded. 



4. VISCUM. Barren FL Cat. 0. Petals 4, dilated at the base, 

 connate, resembling a cal. Anthers sessile, adnate with the 

 petals. 



Fertile FL Cal. submarginate. Petals 4, dilated at the 

 base. Style 1. Berry (Drupe) inferior, 1 -seeded. 

 (Rhamnus catharticus, PENTAND. Urtica dioica, MONCEC.) 

 4 PENTANDRIA. 



6. HUMULUS. Barren FL Perianth single, of 5 leaves. An- 

 thers with 2 pores at the extremity. 



Fertile FL Scales of the catkin large, persistent, concave, 



entire, single-flowered. Perianth 0. Styles 2. Seed 1. 



(Riles alpin., PENTAND. Bn/onia dioica, MONCEC. Salix pen- 



tandra, Ord. DIANDR.) 



5. OCTANDRIA. 



8. RHODIOLA. Barren Fl. Cal. quadripartite. Petals 4. Nec- 

 taries 4, emarginate. 



Fertile FL Cat. quadripartite. Petals 4. Nectaries 4, 

 emarginate. Germens 4. Caps. 4, many-seeded. 



7. POPULUS. Barren Fl. Scales of the catkin lacerated. An- 

 thers 8 30, arising from a turbinate, oblique, entire^ single 

 perianth. 



Fertile FL Scales of the calkin lacerated. Perianth tur- 

 binate (entire) ? Stigmas 4. Caps, superior, 2-celled, 2- 

 valved, many-seeded. Seeds comose. 



6. ENNEANDRIA. 



9. MERCURIALIS. Barren FL Perianth single, tripartite. Stam. 

 9 ,12. Anthers globose, 2-lobed. 



