Ill LINN^EAN ARRANGEMENT 



ORDER III. POLYGNIA. Many Pistils. 



MAGNOLIA. Sepals 3, deciduous. Petals 612, in concentric series. 

 Carpels 1 2-seeded, persistent, forming a strobile-like fruit. Seeds coated 

 with a fleshy aril. Magnoliacca, p. 14. 



LIRIODENDRON. Sepals 3, deciduous. Petals 6. Carpels (samarae) im- 

 bricated in a cone, 1 2-seeded, not opening, attenuated. Magnoliacece, 

 p. 15. 



ASIMINA. Calyx deeply 3-parted. Petals 6, spreading, ovate-oblong; 

 inner smallest. Anthers many, subsessile. Carpels usually 3, ovoid or 

 oblong-sessile, pulpy within. Seeds many. Anonacea, p. 15. 



HYDROPELTIS. Calyx of 3-4 sepals. Petals 34. Ovaries 618. 

 Carpels oblong, acuminate, 1 2-seeded. Cabombacece, p. 18. 



NE&UMBIUM. Calyx petaloid, of 4 6 sepals. Petals numerous. Car- 

 pels numerous, deeply immersed in the upper surface of a turbinate recepta- 

 cle or torus, 1-seeded. " Nelumbiacece, p. 18. 



OBS. The remaining genera belong to the Order JRanunculacete, p. 3. 



CLASS XIII. DIDYNAMIA. 4 Stamens; 2 longer than tlie other 2. 



2 ORDERS. 1. GYMNOSPERMIA. Seeds apparently naked. 

 2. ANGIOSPERMIA. , Seeds in a distinct capsule. 



OBS. The genera of this class form a very natural group, having irreg- 

 ular or bilabiate flowers, with mostly 4 stamens (2 longer) ; but sometimes 

 2 are abortive, and hence such are arranged artificially in the class Dia,ndria. 

 The whole will be more easily, as well as correctly, studied, by the Natural 

 Orders. The genera belonging to the order Gymnospermia will be found in 

 the Natural Order Labiattz, p. 270 ; those belonging to Angiospermia, in 

 the Natural Orders fiignoniaceee, p. 241 ; Pedaliacea, p. 242; Oroban- 

 chacecz, p. 257 ; Scrophulariace<z, p. 258 ; Verbenaccce, p. 283, and Acantha- 

 cece, p. 286. 



CLASS XIV. TETRADYNAMIA. 6 Stamens ; 4 long and 2 short. 



OBS. This class is entirely natural ; and it is therefore altogether unne- 

 cessary to repeat the generic descriptions. It is identical with the Natural 

 Order Crucifertz, p. 23. I have, chiefly for the sake of convenience, pre- 

 served the Linnsean division into Siliculoscc and Siliquosez. Gynandropsis 

 and Polanisia (Cleome Linn.) usually arranged under this class, form the 

 order Capparidacea, p. 33. 



CLASS XV. MONADELPHIA. Filaments combined in one set. 

 ORDER L PENTANDRIA. 5 perfect Stamens. 



PASSIFLORA. Calyx 5-parted, colored. Petals 5 or none, inserted into 

 the calyx. Crown of many filiform rays. Berry often pulpy, rarely sub- 

 membranaceous, pedicelled. Passijloracece, p. 119. 



(Geranium in ORDER DECANDRIA.) 



ORDER II. DECANDRIA. 10 Stamens. 



GERANIUM. Sepals 5, equal. Petals 5, equal. Stamens 10, all-fertile ; 

 5 alternate ones longer, and with nectariferous scales at the base. Carpels 



