44 



NOMENCLATURE. 



case they are always divided into two. In the branches of the 

 Umbellae, the first division is expressed by dichotomuSy the 

 second by bifldus. Aho pedunculi, rami trichotomi are not 

 unfrequent ; for instance, in the panicle of some of the 

 species of Avena. 



A simple forked division is expressed by furcatus, 



51. 



With respect to the uninterrupted continuation of an or- 

 gan, we find its simplicity subject to the foDowing alterations 

 and reverses. We have already remarked (38.), that when 

 a part proceeds uninterruptedly forward, it is called continuus. 

 In the Confervas, there are contracted parts (^strictura), which 

 are exceptions to this simplicity ; (Tab. V. Fig. 10.) In the 

 stem and branches there are knots (7iodi)i swellings produced 

 by a crowding of substance, and which contain within them- 

 selves the means of increase. On the base of the leaf-stalk 

 also {Osteospermum moniliferum), similar knots appear. 



When no indentation takes place at the margin of the 

 part, we have the idea of smooth-margined {integer rimus)^ 

 in which case there is thus also no interruption of the pro- 

 gress in a line. 



Indentations of the margin are caused by teeth, notches, 

 and cirrjii. 



Teeth are, in general, pointed projections on the margin. 

 The rim is called dentated {dentatus), when there are in- 

 terstices between these pointed projections ; but when the 

 teeth run into each other, the rim is said to be serrated (^^r- 

 ratus)' Forms of nearly the same kind are, denticulated 

 (denticulatus), and serrulated (serrulatus), (Tab. VIII. Fig. 

 3.) ; as also, coarsely dentated {grosse dentatus^, deeply, 

 unequally, equally, doubly, and obsoletely dentated (pro-- 

 funde, in^equaliter, <^qualiter, duplicato, and obsolete denta-r 

 tus). AVe say also, equally, unequally, sharply, hooked, 

 connivent, doubly, obsoletely serrated {degualiter, inaquali- 

 ter, arg-uic, nncinato, conniventi, duplicato, obsolete seV'. 

 ratus). 



