OST THE CLASSIFICATION OF PLANTS".

15

Bcation,—of which Helianlhus, Sunflower; Cenlaurea, Centaury; "Rud-teckia, are examples. This also wants the calyx.

The fourth order is Poi.ycam.ia Necessaria. The florets of thecentre are here furnished with pistils and stamens, and those in thecircumference with a pistil only I» this order the seeds are producedfrom the florets in the; circumference; and hence the name ofNecessaria, from their being required to the reproduction of the species.Exainp,— Calendula, Starry Marigold ; Olhonna, Arctotis. This abo isdestitute of the calyx.

The fifth order is Polyoamia Segregata. The florets furnished eachwith a calyx that separates them from each other. Examp.—GlobeThistle; Echmops is an example.

The sixth order, Monogamia, contains the flowers which are simple,but were put into this class by Linnaeus on accountof having their an-thers united, as in the Violet. Examp.— Impatiens, Balsam; Lobelia, Car-dinal Flower. Later botanists have disregarded this order, and thrownthe plants into the classes where the number of stamens has denotedthem. As thus :—Sir James Smith has placed Viola, Violet; Lobelia,Cardinal Flower; and Impatient, Balsam, in class Pbntakduia Mo-

NOCysIA.

GYNANDRIA contains nine orders.Ladle?!"™' Examp ' ~ 0rchis > °P hr ys; Salyrium ; Cypripedium,

Triaxdp.ia. Examp.— Ferraria, Tiger Flower; Sisyrinchmm.Tetranbeia. Examp.— Neperithea.

Hpv TA .T m ' A - r V' xam P—■ p <"«>™, Passion-flower.Hexanihua. Examp.— Arutolochia, Birthwort.Octandria. Examp— Scopolia.Decandsia. Examp.— Belieteras.

Dobecandria. Examp___ Cytinus.

Polyandria. Exainp. -Arum, Cuckow Pint; Calla ; Pothos ■ Dra-

MONOECIA contains eleven orders, which are also formed from thenumber of stamens. Some late botanists have reduced this class andthe following altogether, and thrown the genera into those classesunder which they fall in the system from the number of stamens.1 tins in Gmelin's Edition of the Systema Nature, Chara and Zan-'uaieuia, which were arranged by Linnseus in the first order of Mo-rmm£' *J, f '°" nd in M <W*ndria. How far this reduction in then I''-'' r , f, Ses 1S necessar y ,0 the PUPA'S acquiring a knowledge ofJ,,ri li " ut lu ' rc dis l mto - °" e t! 'ing may be generally ob-

f-fnunl 7 '" UlC P lantsof thia olass tlic bloom of the different sexesis io urn at the same time, and there is certainly little difficulty in

Distinguishing 't from any other—Hence it has its "natural and obviousdistinctions.

MONAKDRIA,

terium.

Examp.— Casuaiina; Myristka, Nutmeg Tree; Eia-

C 2