NATURAL SYSTEM OF LINDLET. 349 



SECTION v. ACEAMPHIBETA (*{, /*?/, and fyvu). Stem increasing both 

 by apex and circumference. Vegetation peripherico-terminal. 



Cohort 1. Gymnospermffi (yu^os, naked, and <r<ri ? ^, seed). Ovules naked, 

 receiving the fecundating matter directly at the micropyle. 



Cohort 2. Apetalse (, privative or without and STX, a petal). Perigone 

 either wanting or rudimentary or simple, calycine or coloured, 

 free or adherent to the ovary. 



Cohort 3. Gamopetalse (J<M. union). Perigone double ; outer calycine, 

 inner corolline ; gamopetalous, rarely wanting by abortion. 



Cohort 4. Dialypetalas (s/zXya, I separate). Perigone double; outer 

 calycine, parts distinct or united, free or attached to the ovary ; 

 inner corolline, parts distinct or very rarely cohering by means 

 of the base of the stamens ; insertion hypogynous, perigynous, 

 or epigynous ; sometimes abortive. 



Under these sections, Endlicher enumerates 279 natural orders, which 

 are grouped under 61 classes. 



731. DIVISION OF THE VEGETABLE KINGDOM BY LINDLEY. 1839. 



(Cyclogens, /Class I. Exogens (proper). 



Exogens < (Wood in circles,) \ II. Gymnogens (naked seeds). 



(.Wood in wedges, III. Homogens. 



fSpermogens, / IV. Dictyogens (leaves reticulated). 



Endogens < (Bearing seeds), \ V. Endogens (proper). 



(Bearing spores, VI. Sporogens or Khizanths. 



Arrnwns /Distinct Stem, VII. Cormogens. 



\0nly a Thallus, VIII. Thallogens. 



In the Exogens and Endogens, the following subordinate series of sub- 

 classes are formed: 



1. Consolidated. Floral envelopes are united both with each other and the 



stamens, and with the ovary. 



2. Separated. Floral envelopes and stamens are united to each other, but the 



ovary is consolidated and free. 



3. Adherent. Petals and sepals adhere to each other and the stamens and 



ovary, but have their parts disunited. 



4. Disunited. Petals and sepals adhere to each other and the stamens, but 



have their parts disunited, and do not adhere to the consolidated ovary. 



5. Dissolved. Petals and sepals are distinct from the stamens, and also from 



the ovary, whose carpels are disunited, either wholly or by the styles. 



In each of these subdivisions, the orders are arranged in two series, 

 the one Albuminous, the other Exalbuminous. 



732. LINDLEY'S DIVISION OF THE VEGETABLE KINGDOM. 1846. 



ASEXUAL OR FLOWEELESS PLANTS. 



Stem and leaves undistinguishable, Class L Thallogens. 



Stem and leaves distinguishable, II. Acrogens. 



