100 : THE COROLLA. 
incisions are not uniform, or the opposite sides are irregu- 
Fig. 24. larly placed round an imaginary axis, as in 
Toadflax (Linaria), Snapdragon (Antir- 
rhinum). See Fig. 24, the corolla of 
Ground-ivy (Glechoma hederacea.) 
The monopetalous irregular corolla is 
365. Ringent, labiate, or bilabiate ;—gaping, like the mou 
of an animal, the tube widening at the upper part, and the 
limb being divided transversely into two unequal parts; one, 
Fig. 25. called the upper, sometimes longer than the 
other, or lower one; as in Sage (Salvia), 
Dead-nettle (Lamium), Ground-ivy (Glecho- 
ma) Fig. 24, and all the Labiate. In 
some, the lips are nearly equal in length, as 
in Thyme, Bugle (Ajuga), Marjoram (Onr- 
ganum), &c. See also Fig. 25, the corolla 
of Lavender (Lavandula spica), slit up - 
gitudinally, and folded back. 
366. Personate, when the tube is expanded, and the orifice 
narrowed by the approximation of the two lips, which are 
unequal, as Toadflax (Linaria), Snapdragon (Antirrhinum)- — 
. The corolla of the Foxglove is sometimes called personate, 
sometimes, campanulate unequal. 
367. When the petals are separate and distinct from each 
other from the base, the corolla is polypetalous, as in 
nus Raphanistrum (Wild Radish or jointed Charlock), Fi 
26, par 369, the Pink (Dianthus). The lower part is ¢ 
