$§ AN INTRODUCTION 
nated with two Lips. But if the Corolla be 
_ POLYPETALOUS, of many Petals; each 
Petal confifts of Unguis, a Claw, which is 
the Lower Part faflened to the Bafe; and 
Lamina, a thin Plate, which isthe upper 
Part, and ufually fpreading. A polypetalous 
Corolla is, cruciform, crofs-/haped, when it 
confifts of four Petals that are equal and 
{preading ; and Papzlionaceous, Butterfy~fhap~ 
ed, when it is irregular, confifting of four 
Petals, of which the under one refembles the 
Keel of a Ship, the upper one rifes, and the 
two fide ones ftand fingle. 
There belongs alfo to the Corolla a Part 
called the Neéar1um, which has been but 
newly diftinguifhed, having been by former 
Botanifts confounded with the Petals. It is 
by Linneus defined to be the Part which 
bearsthe Honey, and belonging to the Flower 
only. This Part affords a wonderful Variety 
in the manner of its appearance. In fome 
Plants itis very large, asin the Narciffus 
and 4qguilegia; in the former of which the 
_ Cup, and in the latter the Horns, are Nec- 
taria: In others it is fearce difcoverable, 
even with Glaffes. In fome Plants it is united 
with, and makes Part of, the Petals: In 
others it is detached from them. Its Shape 
and Situation are alfoas various. Its Ufe is 
not 
