FOR FORMS AND QUALITIES. 



13 



decimetre is three inches and something more than eight Hnes ; 

 the centimetre four lines and a half ; and the 7niMimetre ex- 

 actly i%Vo J about half a line. This measure is not adopt- 

 ed by any other nation, 



18. 



The relative measure is taken by comparison with other 

 parts of the same plant. We say cequalis or cequans^ major^ 

 vmior, long'ior^ brevior, duplo^ triplo major or minor. We 

 say also super an fi, excidens, cequans. 



19. 



We also frequently assume the relative size and extension 

 from comparison, but without always naming the compared 

 parts. We thus name Calyx maximus^ a calyx which, in 

 proportion to all the other parts of the plants, is very large. 

 We also usually say, rami, or pedunculi elongati, petioli hre^ 

 vissimi or ahbreviati, stipul/e mifiima, folia angustissima, 

 ealya; ompliatus, planta pusilla or pumila, arbor gigantea : 

 by whicli expressions every one knows what he is to imder- 

 stand. 



20. 



The relative measure of the parts of one and tlie same or- 

 gan, determines their regularity or equality. 



The parts of an organ are equal (a^qnalis), when they have 

 throughout the same measure and the same form. Inequality 

 {inaqualitas)^ expresses the reverse. Like, {conformis^ simi- 

 Us), relates only to the correspondence of form ; unlike, (dii~ 

 similis, and in Greek compounds heiero), signifies the oppo- 

 site quality. Variable, {varius, variabilis, mutabilis), relates 

 to the disposition of an organ readily to change its form. 



An organ is called regular {regularis) the parts of 

 which shew a certain correspondence, but not a complete simi-. 

 larity, of parts in size and form ; as when, for instance, lai'ger 

 parts are interchanged with those that are smaller. The 

 structure of an organ, agam, is irregular, when no corre- 

 spondence of parts, either in shape or size, is observable. 



