8 CONTENTS AND 



theoretical position, — c, summary — correspondence between a flower and a leafy- 

 branch. 62, Apparent exceptions — examples of symmetrical flowers. 63, a, First 

 cause of deviation, the development of one or more additional whorls — exam- 

 ples. — (5, Second cause, the suppression of entire whorls — examples. — c, Third 

 cause, the suppression of parts of whorls — examples. — d, Fourth cause, the union 

 of parts of the same whorl — examples. — g. Fifth cause, the union of organs of difiier- 

 ent whorls — examples. — /, Sixth cause, unequal development of similar organs — 

 examples. — g^ Seventh cause, reconversion of organs — examples. — h, Eighth 

 cause, development of axis — examples. 



CHAPTER v. — OF THE ELOWER. 



§2. STAMENS AND THE ARTIFICIAL CLASSES.— 34. 



64, The stamens, basis of a classification — why. — 65, Definition — 66, parts — 

 •which essential. 67, Filament. 68, Anther — when sessile — connectile — anal- 

 ogy, — a, cells — dehiscence, — b, connectile, — c, stamen abortive. 69, Modes of 

 attachment of anther to filament, 1st, innate ; 2d, adnate ; 3d, versatile ; 4th, in- 

 trorse — extrorse. 70, PoUen — forms, — », stjTucture — molecules. 71, Physio- 

 logical structure — of the filament — connectile -=- anther — pollen. 72, Theoretical 

 structure — proof from the transitions of stamens into pistils — examples. 73, Cir- 

 cumstances in which stamens varv — twenty-four Linnean Classes. 74, Number, — 

 Etymology of the names of the Classes. Class 1st, 2nd, 3d, 4th, 5th, 6th, 7th, 8th, 

 9th, 10th, 11th. 2nd, Position, — 12th, 13th. 3d, Eelative length, — 14th, 15th, 

 4th, Connection, — 16th, 17th, 18th, 19th, 20th. 5th, Absence, — 21st, 22d, 23d, 

 24th. 



CHAPTER VI. — THE ELOWER. 



§3. OF THE PISTIL AND THE ARTIFICIAL ORDERS. — 39. 



75, The pistil, its position — structure. 76, Ovary — ovules. 77, Ovary simple — 

 compound — carpels. 78, The style — number — connection. 79, Stigma — sim- 

 ple — compound. 80, Number of styles, orders founded upon. Order 1st, 2nd, 3rd, 

 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th. Note, — Orders of the class Didyna- 

 mia — Tetradynamia— Orders of the 16th, 17th, ISth, 20th, 21st, and 22d classes. 

 Orders of Syngenesia, Equalis — Superflua — Frustranea — Necessaria — Segre- 

 gata. Orders of Polygamia, Moncecia — Dioecia. Orders of the 24th, class. 81, 

 Ovules. 82, Placenta — structure — direction. S3, Physiological structvure — of the 

 ovary — style — stigma — without epidermis. 84, Theoretical structure explained, — 

 sutures — ventral — dorsal, — o, illustration, — 3, c, illustrations continued. 85, Pro- 

 positions, — first — second — third — fourth. 86, These propositions when true. 87, 

 Central placenta, — parietal placenta. 88, Free central placenta, — explanation. — 

 a'. Ovules proved to be analogous to buds. 89, Ovules enclosed — naked, — a, erect 

 — ascending — pendulous — suspended. 90, Foramen — primine — secundine — nu- 

 cleus — a, illustration. 91, Funiculus — chalaza. 



§4. OF THE MUTUAL ACTION OF THE STAMENS AND PISTILS.— 44. 



92, Their specific office— how accomplished, — a, illustrations, — tulip — Kalmia, 

 &c. 93, Action of pollen upon the stigma— tubes. 94, Molecules— their destina- 

 tion. 



CHAPTER Vn. — THE ELOWER. 



§5. OF THE CALYX. — 45. 



95, Calyx — etymology — color. — 96, Sepals — monosepalous — polysepalous. — 

 97, Calyx — infenor — superior, — 98, caducous — deciduous — persistent, — 99, re- 

 duced — wanting — a, Pappus — pilose — plumose — setose — paleaceous. 



}6. OF THE COROLLA. — 46. 



100, The corolla— etymology. 101, Petals — polypetalous—monopetalous. 102, 

 Claw — lamina, — 103, tube — limb, — 104, regular — irregular. 1, Corolla campanu- 

 late. 2, Infundibuliform. 3, Hypocratbnfonn. 4, Kotate. 5, Labiate — ringent — 

 personate — galea. 105, Forms of polypetalous corollas, — 1, Cruciform. 2, Rosa- 

 ceous. 3, Liliaceous. 4, Caryophyllaceous. 5, Papilionaceous — vexillura — alse — 

 carinse. 106, Physiological structure — colors. 



