KEY TO THE ORDERS. XIX 



* * Stamens just, as many as the. lobes of the corolla, one in front 



of each lobe. 



PRIMULACE.E. Stamens on the corolla. Ovary 1-celled, 



with a free central placenta rising from the base. 91 



* * * Stamens just as many as the lobes of the corolla, inserted on 



its tube alternately with its lobes. 



+- Ovaries 2, separate. 



APOCYNACE.E. Plants with milky juice. Anthers converg- 

 ing round the stigmas, but not adherent to them. 

 Filaments distinct 114 



ASCLEPI APACE.*. Plants with milky juice. Anthers ad- 

 hering to Jhe stigmas. Filaments monadelphous. 

 Flowers in umbels 114 



-*-+- Ovary J^-ldbed aruond the base of the style. 

 Mentha, in 



LABIATE. Stamens 4. Leaves opposite, aromatic 100 



BORRAGINACE^E. Stamens 5. Leaves alternate 105 



+- -F -i- Ovary 1-celled ; the seeds on the walls. 



HYDROPHYLLACE^E. Stamens 5, usually exserted. Style 



2-cleft. Leaves lobed and sometimes cut-toothed. 108 



GENTIANACE^E. Leaves entire and opposite; or (in Men- 



yanthes) of 3 leaflets 112 



4-4--J- -*- Ovary with 2 or more cells. 



AQUIFOLIACE^E. Shrubs. Corolla almost polypetalous. 



Calyx minute. Fruit a red berry-like drupe. 



Parts of the flower chiefly in fours or sixes 90 



PLANTAGINACE.E. Stamens 4. Pod 2-celled. Flowers in 



a close spike 91 



Verbascum, in 



SCROPHULARIACEL*. Corolla nearly regular. Flowers in a 

 long terminal spike. Stamens 5 ; the filaments, 

 or some of them, woolly 94 



POLEMONIACEJS. Style 3-cleft. Corolla salver-shaped, 

 with a long tube. Pod 3-celled, few-seeded ; seeds 

 small 109 



CONVOLVULACE^. Style 2-cleft. Pod 2-celled, generally 

 4-seeded ; seeds large. Chiefly twining or trailing 

 plants 109 



