8 CONTENTS AND 



theoretical position, — c, summary — correspondence between a flower and a leaf 

 branch. 62, Apparent exceptions — examples of symmetrical flowers. 63, «, Fir-, 

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

 ples. — b. 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. — e, Fifth cause, the union of organs of differ- 

 ent whorls — examples. — /, Sixth cause, unequal development of similar or^ns — 

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

 cause, development of axis — examples. 



CHAPTER v. — OF THE FLOWER. 



§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, Pollen — forms, — a, structure — molecules. 71, Physio- 

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

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

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

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

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

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

 24th. 



CHAPTER VI. — THE FLOWER. 



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



75, The pistO, 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, Sth, 9th, 10th, 11th, 12th. iVbie, — Orders of the class Didyna- 

 mia — Tetradjmamia — Orders of the 16th, 17th, 18th, 20th, 21st, and 22d classes. 

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

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

 Ovules. 82, Placenta — structure — direction. 83, Physiological stracture — of the 

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

 sutures — ventral — dorsal, — a, 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- 

 eleus — a, illustration. 91, Fvmicnlus — 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, Molecxiles- their destina- 

 tion. 



CHAPTER Vn. — THE FLOWER. 



}5. OF THE CALYX. — 45. 



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

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

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



§6. OF THE COROLLA. — 46. 



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

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

 late. 2, Infundibulifoi-m. 3, H3rpocratiriform. 4, Rotate. 5, Labiate — ringent — 

 pei-sonate — galea. 105, Forms of polypetalous coroUas, — 1, Cruciform. 2, Rosa- 

 ceous. 3, Liliaceous. 4^ Caryophyjlaceous. 5, Papilionaceous — vexillum — alae — 

 carinse. 106, Physiological structure — colors. 



