APPENDIX. 311 



skin. The Tunic, (arillus), a complete or partial covering of 

 a seed, fixed to its base only, and more or less loosely, or close- 

 ly enveloping its other parts. The Seed-down, (Pappus,) the 

 chaify, feathery, or bristly crown of many seeds that have no 

 Pericarp. Its use is to transport seeds from their native 

 spot, as in the Thistle, and Dandelion. The Tail, (Cauda,) 

 formed from the permanent style, and generally of a feathery, 

 hairy appearance. Beak, (Rostrum,) an elongation of the 

 seed-vessel, though applied to some naked seeds. A Wing 

 (Ala) is a membranous appendage to seeds, or their cap- 

 sules. The Awn is usually an appendage to the flower and 

 seeds of grasses Seeds are occasionally furnished with spines, 

 hooks, scales, «fec., designed for their security while living, 

 and for their subsequent dispersion. 



H| and i 



L 



LESSON 93. 



Table of the 24 Classes. 



1. Monandria 1 Staanen. Pigeon's foot and Star wort. 



2. Diandria 2 stamens. Pennyroyal, Lilac. 



3. Triandria 3 do. Blue flag, tierdsgrass. 



4. Tetrandria ... 4 do. Chequer berry. Witch hazel. 



5. Pentandria ... 5 do. Swamp Pink, Midlein, Violet, 



6. Hexandria ... 6 do. Barberry, Lily, Sweet Flag. 



7. Heptandria . . 7 do. Horse chestnut. 



8. Octandria ... 8 do. Blue berry, Crane berry. 



9. Enneandria . . 9 do. Sassafras, Fever bush. 



10. Decandria. . . 10 do. Ground Laurel, Chickweed, 



Pink. 



11. Dodecandria.l2 do. Purslane, Wild Ginger. 



12. Icosandria. . . 20 do. or more, inserted into the Calyx. 



Rose. 



13. Polyandria. . . Many Stamens, inserted into the recepta- 



cle. Buttercups. 



14. Didynamia. . . 4 Stamens : 2 long and 2 short. Spear- 



mint, Catmint. 



15. Tetradynamia 6 do. 4 long and 2 short. Mustard. 



16. Monadelphia. Filaments united at bottom, but separate 



at top. Mallow. 



17. Diadelphia . . Filaments in two sets. Fumitory, Lupine. 



18. Polyadelphia . Filaments in many sets. St. John's Wort. 



