FLOWERS MONGPETALOUS. £59 



valves, opening with an elastic spring. Ex. Aeanthus 

 Ruellia and Justicia. 



4. Jasminece. — Calyx monophyllous. Corolla regular. 

 Stamens two. Fruit two-celled. Syringa, Chionan- 

 thus, Fraxinus and Olea are examples. 



5. Vitices. — Calyx and Corolla tubular. Stamens us- 

 ually four, didynamous. Seeds in a berry or cap- 

 sule. Ex. Vitex, Verbena and Lantana. 



6. Labiatce. — Calyx tubular, five-parted or bi-labiate. 

 Corolla irregular. Stamens didynamous. Germen 

 four-lobed. Seeds four, naked, attached to the recep- 

 tacle at the base of the calyx. Embryo straight with- 

 out albumen. This order embraces thirty genera in 

 the United States, exemplified in Mentha, Stachys and 

 Teucrium. 



7. Scrophularia. — Corolla irregular. Stamens two ; or 

 four, and didynamous. Capsule with two cells, and 

 two concave valves, with the seed bearing partition 

 united to their margin. Seeds numerous and small. 

 Albumen fleshy. Digitalis, Gerardia and Mimulus 

 are examples. 



8. Solanece. — Calyx five-parted, persistent. Corolla reg- 

 ular five- cleft. Stamens five, epipetalous. Embryo 

 curved or spiral. Albumen fleshy. Datura, Atro- 

 pa and Solanum are examples. 



9. Borraginece. — Calyx five-parted, persistent. Corol- 

 la regular. Stamens five. Germen simple or four 

 lobed. Seeds four, niked, and attached to the base 

 of the style, or enclosed in a vessel. Embryo with- 

 out albumen. Leaves alternate and rough. Borage, 

 Lycopsis and Lithospermum are examples. 



10. Convolvuli. — Calyx five-parted. Corolla regular. 

 Stamens five epipetalous. Capsule with 2, 3 or 4 



