- The External Form of Plants, “125° 
parts, so that each one is exactly similar to the other re- 
_ versed. The regular gamosepalous calyx may be rotate 
{or with the limb expanded like a wheel], zurbcnate or top-. 
shaped, urceolate or urn-shaped (Fig. 229), 2nfundibult- 
form or funnel-shaped, éubular or cylindrical, inflated (Fig. 
234), [campanulate or bell-shaped], &c. ‘The margin or | 
edge of the calyx may also be toothed, lobed, or tncised, accord- 
ing to the depth to which it is cut. The number of teeth 
has also to be taken into account, when the calyx is said to 
be bifid, trifid, multifid, &c.; or in the case of aposepalous 
calices the number of separate sepals, when it is dzsepalous, 
Fic. 229.—I. Turbinate ; II. urceolate Fic. 230.— Bilabiate five-toothed calyx 
calyx (represented diagrammatically). of Lamu. 
trisepalous, polysepalous, &c. Among irregular forms of 
the calyx an especially common one is the dz/absate, or two- 
lipped (Fig. 230), a gamosepalous calyx divided by two 
deep incisions into an upper and under division or lip 
[particularly characteristic of the order Labiatz]; and not | 
unfrequent are the spurred (Fig. 231), furnished with a larger 
or shorter hollow appendage or spur [as in Zop@olum and 
Lmpatiens] ; and the saccate (Fig. 232), which occurs fre- 
quently in Cruciferee, and consists of four distinct Sepals; . 
two of which are gibbous at the base. 
As respects its. persistence, the calyx may be caducous, 
when it is thrown off at the time of expansion of the flower, 
as in the poppy (Fig. 233); @ecéduous, when it falls off at 
