PAET V 



THE NATURAL SYSTEM OF CLASSIFICATION. 



390. The great advantage of the Linngean System consists in 

 its offering tiie simplest and most easy method of finding the 

 names of unknown plants ; but the student should not rest here. 

 When we become interested in an individual, we wish to know 

 more respecting him than his namej we inquire about his char- 

 actei\ his connections^ and his habits i — and this is what we leam 

 of plants by the Natural System of Botany. 



In arranging the various genera described in this work accord- 

 ing to the Statural System, we adopt, with some modifications, 

 the system proposed by Jussieu, improved by De CandoUe, and 

 still further perfected by Lindley. 



39 L SYNOPTICAL VIEW OF THE CLASSES IN THE NATURAL SYSTEM. 



Series I. 



PHENOGA^IOUS 

 PLANTS, 



f Exogenous growth ; adi- 

 I cotyledonous embryo. 



Endogenous growth ; a 

 I monocotyledonous em- 

 l. bryo. 



f f Woody 



I I and vas- 



\ distinct axis I cular tis- 



Series II. 



! or stem and 

 foliage. 1 



sue. 



CRYPTOGAMOUS 

 PLANTS. 



Cellular 

 tissue 

 j { only. 



No distinction of stem 

 and foliage, but all con- 

 I founded iu a thallus. 



Class I.— EXOGENS or DICOTYLEDONS. 



Seeds in a > ^ . , , • 



pericarp. \ ^^^-class 1. AngiospeRMS. 



Seeds naked, " 2. GymnosperM3. 

 " II.— ENDOGENS or MONOCOTYLE 

 DONS. 



III.— ACROGENS. 



IV.— ANOPHYTES. 



v.— THALLOPHYTES. 



GENERAL VIEW OF THE NATURAL SYSTEM. 



392. Series I. — Flowering or Phenogamous Plants. 

 Class I. — Exogenous or Dicotyledonous Plants. 

 SuB-cLAss I. — Angiospeemous, EXOGENOUS Plants. 



DIVISION I. 



PoLYPETALous, EXOGENOUS Plants. — Under this division aie 

 twenty ^ groups, consisting of ITatural Orders, from two to 

 twelve in each group. The groups are founded on various cir- 

 cumstances, as \hQ nunibe^' of ovaries., their coherence., or dis- 

 tinctness ; the 2^osition and nuinber of petals and stamens ; 

 position of the emhryo in the seed, whether the latter contains 

 albumen or is destitute of it ; number oi floral enmUpes ; calyx 

 and iKtals persistent or caducous ; trees., or shruhs ; flmoers, 

 regnhtr or irregular ; situation of leaves; fruit united, or sep- 



