9-2 



5a. Leaves triangular-hastate, with sharp basal lobes 



Bindweed, Convolvulus sepium. 

 5b. Leaves oblong-ovate, the basal lobes obtuse 



Bindweed, Convolvulus sepium var. pubescens. 

 6a. Stem smooth or nearly so; ovary 2-celled (flowers white) 



Wild Potato Tine, Ipomoea pandurata. 



6b. Stem with reflexed hairs; ovary 3-celled (flowers of various 

 colors) Morning- Glory, Ipomoea purpurea. 



la. Introduced weed, growing as a parasite on clover 



Dodder, Cuscuta epithymum. 



7b. Native species, on various shrubs and herbs 8. 

 8a. Flowers sessile 9. 

 8b. Flowers distinctly pedicelled 12. 



9a. Sepals united below into a gamosepalous calyx 10. 

 9b. Sepals separate from each other 11. 



lOa. Calyx-lobes obtuse Dodder, Cuscuta arvensis. 



lOb. Calyx-lobes acute Dodder, Cuscuta obtusiflora. 



Ha. Flowers in dense rope-like twists on various species of herbs 



Dodder, Cuscuta paradoxa. 

 lib. Flowers in dense clusters on various species of shrubs 



Dodder, Cuscuta compacta. 



12a. Tips of the petals inflexed Dodder, Cuscuta coryli. 



12b. Tips of the petals erect or spreading 13. 



13a. Capsule depressed at the. summit Dodder, Cuscuta cephalanthi. 

 13b. Capsule pointed at the summit Dodder, Cuscuta gronovii. 



POLEMONIACE4E, the Polemonium Family 



Herbs with alternate or opposite leaves and conspicuous regu- 

 lar flowers; sepals 5, united; petals 5, united and bearing the 5 stamens 

 in the corolla-tube; ovary superior, 3-celled. 



la. Leaves pinnately compound and alternate (2 4 dm. high; flowers 

 blue, in spring) Greek Yalerian, Polemonium reptans. 



Ib. Leaves fascicled, narrowly linear (abou^t 1 dm. high; flowers pink- 

 purple, in spring) Moss Pink, Phlox subulata. 

 Ic. Leaves simple, strictly opposite 2. 



2a. Corolla-lobes deeply 2-cleft to the middle (1 2 dm. high; 



flowers pink, in spring) Cleft Phlox, Phlox bifida* 



2b. Corolla-lobes entire and rounded, or somewhat notched at 



the apex 3. 

 3a. Flowers in summer (815 dm. high; flowers purple) 



Garden Phlox, Phlox paniculata, 

 3b. Flowers in spring (3 6 dm. high) 4. 

 4a. Corolla blue-purple; stems ascending 



Sweet William, Phlox divaricata. 

 4b. Corolla pink or red-purple; stems erect 



Sweet William, Phlox pilosa. 



