CL. XXII.] DICECIA. 367 



Fertile flowers. Calyx of six leaves. Corona none. Style one. Berry 

 superior, three-celled. Seeds in pairs. 



(Valeriana dioica and some species of Salix.) 



OrderlV. TETRANDRIA. Four Stamens. 



5. HIPPO'PHAE. Barren flowers. Calyx deeply cleft. Corolla 



none. 



Fertile flowers. Calyx tubular, cleft. Style one. Berry superior. 

 Seed solitary, oblong. 



6. MYRI'CA. Barren flowers in a catkin. Calyx a concave scale. 



Corolla none. 

 Fertile flowers in a catkin. Calyx a concave scale. Corolla none. 



Styles two. Berry superior. Seed solitary, globular. 

 4. VI'SCUM. Barren flowers. Calyx none. Corolla of one petal, 



deeply divided into four segments. Anthers sessile on the segments 



of the corolla. 

 Fertile flowers. Calyx a slight border. Corolla with four segments. 



Style none. Berry inferior. Seed solitary, compressed. 

 (Rhamnus catharticus. Euonymus europaeus. Urtica dioica.) 



Order V. PENTANDRIA. Five Stamens. 



1, HU'MULUS. Barren flowers. Calyx five-leaved. Corolla none. 



Anthers with two terminal pores. 



Fertile flowers in a catkin. Calyx an oblique undivided scale. Co- 

 rolla none. Styles two. Seed one. 



(Ribes alpina. Brynnia dioica. Salix pentandra.) 



Order VI. HEXANDRIA. Six Stamens. 



8. TA'MUS. Barren flowers. Calyx none. Corolla with six deep 



segments. 



Fertile flowers. Calyx none. Corolla with six deep segments. Style 

 three-cleft. Berry inferior, three-celled. Seeds in pairs. 

 (Rumex Acetosa and Acetosella.) 



Order VII. OCTANDRIA. Eight Stamens. 



10. RHODI'OLA. Barren flowers. Calyx with four deep segments. 



Petals four. Nectaries four-notched. 



Fertile flowers. Calyx, petals, and nectaries, the same. Pistils four. 

 Capsules four. Seeds numerous. 



9. PO'PULUS. Barren flowers. Cat/tin imbricated. Calyx a jagged 



scale. Corolla turbinate, oblique, undivided. 



Fertile flowers. Catkin, calyx, and corolla, the same. Stigmas four 

 or eight. Capsule superior, one-celled, two-valved. Seeds with a 

 tuft of hairs. 



Order VIII. ENNEANDRIA. Nine Stamens. 



11. MERCURIA'LIS. Barren flowers. Calyx with three deep seg- 



ments. Corolla none. Stamens from nine to twelve. Anthers of 

 two globular lobes. 



Fertile flowers. Calyx and corolla the same. Styles two. Capsule 

 two-lobed, two-celled. Seeds solitary. 



