CONVOLVULACEAE 253 



b. Fruit drupaceous, or of 2 or 4 nutlets. Fam. 5. Borraginaceae. 



B. Stamens 4 and didynamous, or i or 2. 



Carpels ripening into a group of 4 nutlets, an achene or a drupe. 

 Style apical on the lobeless ovary. 



Ovary 2-several-celled. Fam. 6. Verbenaceae. 



Ovary i-celled. Fam. 7. Phrymaceae. 



Style arising between the lobes of the ovary. Fam. 8. Labiateae. 

 Carpels ripening into a capsule. 

 I'lacentae of the ovary axile. 

 Ovary 2-celled, or rarely 3-5-celled. 

 Corolla-lobes imbricated : capsule not elastically dehiscent. 



Fam. 10. Scrophulariaceae. 

 Corolla-lobes convolute : capsule elastically dehiscent. 



Fam. 15. ACANTHACEAE. 



Ovary i-celled. Fam. 11. Lentibulariaceae. 



Placentae of the ovary parietal. 



Herbs parasitic on the roots of other plants : leaves scale-like : foliage 



not green. Fam. 12. Orobanchaceae. 



Trees, shrubs or woody vines, or herbs, but not parasitic : leaves not 

 scale-like : foliage green. 

 Ovary and capsule 2-celled : trees, shrubs or woody vines : seeds 



winged. Fam. 13. Bignoniaceae. 



Ovary and capsule i-celled : herbs : seeds wingless. 



Fam. 14. Martvniaceae. 



Family i. CONVOLVULACEAE Vent. Morning-glory Family. 



Stigma or stigmas capitate. 



Corolla salverform : stamens and style exserted. i. Quamoclit. 



Corolla campanulate or funnelform : stamens and style included. 



2. Ipomaea. 

 Stigmas elongated. 3. Convolvulus. 



1. QUAMOCLIT Moench. 



Leaf -blades pinnately parted into narrow segments. i. Q. Quamoclit. 



I<eaf-blades entire or merely angulately lobed. 2. Q. coccinea. 



1. Quamoclit Quamoclit (L.) Britten. Cypress Vine. Indian 

 Pink. (Man. p. 751 ; I. F. f. sg^j.) In waste and cult, ground, Va. to 

 Fla., Kans. and Tex. Adventive farther north. Nat. from tropical Am. 

 — Pennsylvania : Bucks. 



2. Quamoclit coccinea (L.) Moench. Small Red Morning-glory. 

 (Man. p. 751 ; I. F. f. ^944-) Along river-banks in waste places, Pa. to 

 Fla., Ohio, Kans., Tex. and Ariz. Nat. from tropical Am., or native in 

 the Southwest. — Pennsylvania : Northampton ; Lancaster ; Phila- 

 delphia. 



2. IPOMOEA L. 



Ovary 2-celled or rarely 4-celled : stigma entire or 2-lobed. 



Perennial from an immense root : corolla 5-8 cm. long. i. /. pandurata. 



Annual with fibrous roots : corolla 1-2 cm. long. 2. /. lacunosa. 

 Ovary 3-celled : stigmas 3. 



Corollas over 4.5 cm. long : leaf-blades entire. 3. I. purpurea. 



Corolla less than 4.5 cm. long: leaf-blades 3-lobed. 4. /. hederacea. 



