462 BOTANY. 



words which express numbers, the termination of andria, (from 

 avdgb$ 9 a man,) signifying the stamina or male parts of the flower. 

 Thus, Monandria characterizes a flower with one stamen; Dian- 

 dria a flower with two stamina, &c. and so on. The 14th and 15th 

 classes have the termination dynamia, (from dwapsiv, to prevail,) 

 from the two or four stamina being longer than the others. The 

 16th, 17th, and 18th classes have the termination adelphia, 

 (from adsXpte, a brother,) because the filaments are more or less 

 united. The 19th class is termed Syngenesia, to express the 

 anthers being united ; and the 20th, Gynandria, from the sta- 

 mina arising from the germen or style. The four remaining 

 classes are characterized by terms having a similar reference to 

 the parts concerned in fructification. 



I. MONANDRIA, the flowers of which contain a single stamen. 

 II. DIANDRIA, 2 stamens. 



III. TRIANDRIA, 3 stamens. 



IV. TETRANDRIA, 4 stamens, (all of equal length.) 

 V. PENTANDRIA, 5 stamens, (the anthers not united.) 



VI. HEXANDRIA, 6 stamens, (all of equal length.) 

 VII. HEPTANDRIA, 7 stamens. 

 VIII. OCTANDRIA, 8 stamens. 

 IX. ENNEANDRIA, 9 stamens. 

 X. DECANDRIA, 10 stamens, (filaments not united.) 

 XI. DODECANDRTA, 12 or more stamens arising from the receptacle. 

 XII. ICOSANDRIA, about 20 stamens arising from the calyx or corolla. 



XIII. POLYANDRIA, many stamens arising from the receptacle. 



XIV. Dm YNAMIA, 4 stamens, 2 being longer than the rest. (Never more thaa 



1 pistil.) 

 XV. TETRADYNAMIA, 6 stamens, 4 being longer than the rest. (Cruciform 



flowers with 1 pistil.) 



XVI. MONADELPHIA, filaments more or less united. (The anthers free.) 

 XVII. DTADELPHIA, filaments forming 2 sets. (Flowers always papilionaceous.) 

 XVIII. POLYADELPHIA, filaments forming more than 2 sets. 

 XIX. SYNGENESIA, 5 stamens, the anthers united. (Compound flowers.) 

 XX. GYNANDRIA, stamens arising from the gerraen or style, as in the Orchidece. 

 XXI. MON(ECIA, stamens and pistils in different flowers on the same plant. 

 XXII. DKECIA, stamens and pistils distinct; the former confined to the flowers 

 of one plant, the latter to those of another. 



XXIII. POLYGAMIA, stamens and pistils in the same flower, or stamens only, or 



pistils only ; the whole on one plant or on different plants. 



XXIV. CRYPTOGAMIA, plants in the fructification of which stamens and pistils 



cannot be perceived, or very imperfectly. 



These Classes contain a number of Orders, founded on the 

 following characters. 



In the first thirteen classes, Linnaeus has established his or- 



