(74) 



3. Sequoia. — Anthers of the S flowers at- 

 tached to a peltate bract. Cone ovate. 

 Leaves alternate. Coniferous. 



4. Alnus. — S flowers with 3-4 cleft peri- 

 gonium. 9 flowers: perigonium 0. 



V. Pentandria— Polyandria . 



A. Flowers complete, not amentcwcous. 



1. Myriophyllum. — 3 flower: stamens 8. ? 

 flower: ovary inferior, 4-celled, 4-ovu- 

 late. Aquatic. 



2. Ptelea. — Calyx 5-parted. Petals 5. Sta- 

 mens alternating with petals. Style 1. 

 Fruit a 2-seeded samara. Shrub. 



3. Khus. — Calyx 5-parted, persistent. Pet- 

 als 5. Stamens 5, alternating with the 

 petals. Ovary 1-celled, 1-ovulate. 

 Styles 3. Fruit a drupe. 



4. ^^sculus. — Calyx irregular, gainosepa- 

 lous. Petals 5, unguiculate. Filaments 

 ascending. Ovary 3-celled. Style 1. 

 Cells 2-ovulate. Fruit a l.-seeded cap- 

 sule. Shrub. Tree. 



5. Acer. — Stamens 8. Ovary 2-celled, 2- 

 lobed. Fruit a 2-seeded samara. Tree. 



B. Flowers complete. 5 flowers amentaceous. 

 1. Juglans. — 5 perigonium, 2-6 parted. $ 



flowers with superior 4-dentate calyx. 

 Petals 4. Tree. 



