UUT.\J\'Y. 



tain the pistils. Liiina?iis divided the 

 vegetable world according to the 

 number of stamens and pisiils in the 

 flower; so that, to know to what 

 tribe a specimen belongs, we have 

 only to count these parts, and search 

 for the name in the proper works un- 

 der the general division ascertained. 



Chis. 



I. I Stamen . . 



TI. 2 stamens Diandria. 



These divisions are also called 

 classes and orders, the first being 

 constructed from the number and po- 

 sition of the stamens, the orders by 

 the number, &c., of the pistils. Ev- 

 er>' plant, therefore, belongs to a 

 class and order, unless it be diaecious. 

 The classes are as follows : 



Styled. 

 Monaudria. 



III. 3 



IV. 4 " : 



V. 5 " 



VI. 6 " 



VII. 7 " 



VIII. 8 " 



IX. 9 " 



X. 10 " 



XI. 12 to 19 stamens 



XII. 20 or more stamens, inserted into the calyx 



XIIL 20 or more stamens, inserted into the receptacle 



XIV. 2 lon^ and 2 short stamens .... 



XV. 4 long and 2 short stamens Tetradynamia. 



XVI. stamens united into a tube Monadelphia. 



XVII. stamens united into two parcels by filaments Diadelplna. 



XVIII. stamens united by their filaments into several parcels . . . Polyadelphia. 



XIX. stamens united by their anthers into a tube Syugenesia. 



XX. stamens united with the pistil ........ Gynandria. 



XXI. stamens and pistils in separate flowers, but on the same plant . . " 



XXII. stamens and pistils in separate flowers and on separate plants, one ) 



male, the other female j 



XXIII. stamens and pistils, separate in some flowers and united in others, 



either on one plant or on two .......' 



XXIV. stamens and pistils not clearly developed 



Triandria. 



Tetrandria. 



Pentandna. 



He\andria. 



Heptandria. 



Octandria. 



Enneandrin. 



Decandria. 



Dodecandria. 



Icosandria. 



Polyandria 



Didynamia. 



Moncecia. 

 Diaecia. 



Polyganiia. 

 Cryptogamia. 



The orders are as follows ; 



Besides these, which are ascertain- 

 ed by simple enumeration of the 

 styles, Linnaeus divided some of the 

 classes below the thirteenth into pe- 

 culiar orders. Thus, 



The orders of the class Didynamia 

 are two : 1st. Gymnospcrinia, in which 

 the seed vessel or ovary is divided 

 into four lobes, each giving one style 

 or pistil, and containing one seed ; 

 2d. Angiospcrma, with a perfect ovary, 

 two-celled, and many-seeded. 



In class fifteenth, Tetradynamia, 

 the orders are : 1st. Siliquosa, plants 

 with long pods, as the cabbage ; 2d. 

 aUiculosa, with short pods. 

 104 



Class nineteenth, Syngenesia, is 

 divided into five orders : 1st. Pohjga- 

 mia (cqualis, each flower of the col- 

 lection is furnished with stamen and 

 pistil ; 2d. Polygamia snperflua, the 

 florets round the circumference or 

 disc hermaphrodite, but the central 

 female only ; 3d. Polygamia frustranca, 

 the disc florets hermaphrodite, the 

 central steril ; 4th. Polygamia ncces- 

 saria, the florets of the ravs or cir- 

 cumference male, those of the centre 

 female ; 5th. Polygamia scgrcgata has 

 several florets, either simple or com- 

 pound, but with a proper calyx, in- 

 cluded within one general calyx. 



Class twenty-third, Polygamia, is 

 divided into two orders, as the plants 

 are monajcious or dia?cious. 



In Cryptogamia there are five or- 

 ders, which are, however, in no way 

 connected with the female organs : 

 1st. Filices, or ferns ; 2d. Musci, or 

 mosses ; 3d. Hepaticce, or liverworts ; 

 4th. AlgcB, or sea-weeds ; and, 5th. 

 Fungi, or mushrooms. 



To discover the name of any plant, 



