CONVOLVULACEAE. 345 



b. Corolla irregular, more or less 2rlipped (regular in SOLANACEAE, and nearly or 

 quite so in Verbena and Callicarpa of the VERBENACEAE). 



1. Carpels 1-2-seeded. 

 Ovary not lobed, 2-4-celled, the style apical ; carpels 



separating into 1-seeded nutlets or fruit drupaceous. Fam. 7. VERBENACEAE. 

 Ovary 4-lobed around the style, the lobes ripening 



into 1-seeded nutlets. Fam. 8. LAMIACEAE. 



2. Carpels several-many-seeded (2-seeded in some Acanthaceae). 



$ Fruit a berry, or more commonly a capsule which is 1-2-celled, 2-valved, circum- 



scissile, or irregularly bursting, not elastically dehiscent. 

 Placentae axile. 



Flowers regular ; fertile stamens 5 (4 in Petunia) ; 



fruit a berry or capsule. Fam. 9. SOLANACEAE. 



Flowers more or less irregular ; fertile stamens 

 2 or 4 (5 in Verbascum) ; fruit a capsule. 



Ovary 2-celled, rarely 3-5-celled. Fam. 10. SCROPHULARIACEAE. 



Ovary 1-celled ; marsh or aquatic herbs with 



flowers on scapes. Fam. 11. LENTIBULARIACEAE. 



Placentae parietal. 



Trees, shrubs, or woody vines ; capsule 2-celled. Fam. 12. BIGNONIACEAE. 

 Herbs, annual or perennial. 



Ovary 2-celled or falsely 4-celled ; flowers axil- 

 lary. Fam. 13. PEDALIACEAE>. 

 Ovary 1-celled ; flowers in terminal racemes. Fam. 14. MARTYNIACEAE. 



tt Capsule completely 2-celled, elastically loculicidally dehiscent ; opposite-leaved 

 herbs ; placentae axile. Fam. 15. ACANTHACEAE. 



3. Ovary 2-celled with 1 ovule in each cavity ; trees or shrubs with alternate leaves. 



Fam. 16. MYOPORACEAE. 



Family 1. CONVOLVULACEAE Vent. 

 MORNING-GLORY FAMILY. 



Herbs or vines, some tropical species shrubs or trees, with alternate 

 estipulate leaves, and regular perfect axillary cymose or solitary flowers. 

 Calyx inferior, 5-parted or 5-divided, usually persistent, the segments or 

 sepals imbricated. Corolla gamopetalous, the limb 5-angled, 5-lobed or 

 entire. Stamens 5, inserted low down on the tube of the corolla and 

 alternate with its lobes, all anther-bearing, the filaments filiform, or 

 dilated at the base; anthers 2-celled, the sacs longitudinally dehiscent. 

 Disk annular or none. Ovary superior, sessile, 2-3-celled, with 2 ovules 

 in each cavity, or falsely 4r-6-celled with a single ovule in each cavity, 

 usually entire; styles 1-3, terminal, ovules anatropous. Fruit mostly a 

 2-4-valved capsule. Seeds erect, the testa villous, pubescent or glabrous; 

 embryo plaited or crumpled; cotyledons foliaceous; endosperm fleshy or 

 cartilaginous, usually scanty. About 45 genera and probably 1,000 species, 

 of wide distribution. 



Pericarp dehiscent. 



Styles separate nearly or quite to the base. 1. Evolvulus. 



Styles united up to the stigma or stigmas. 



Stigmas oval to oblong, flattened. 2. Jacquemontia. 



Stigmas globose. 



Stamens and style exserted. 



Corolla-limb very broad, the tube cylindric. 3. Calonyction. 



Corolla funnelform or salverform. 



Ovary 4-celled ; herbaceous vines. 4. Quamoclit. 



Ovary 2-celled ; vines woody at the base. 5. Exogonium. 



Stamens and style included. 6. Ipomoea. 



Pericarp indehiscent ; sepals spreading in fruit. 7. Turblna. 



1. EVOLVULUS L. Sp. PI. ed. 2, 391. 1762. 



Mostly silky-pubescent or pilose herbs, with small leaves, and axillary small 

 flowers. Sepals nearly equal. Corolla funnelform, campanulate or rotate, the 

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