VARIOUS PLANT GROUPS 379 
(Fig. 147, page 148), mountain laurel (Fig. 189, page 202), 
and sheep laurel (Fig. 190, page 202). 
Formulas of Gaultheria, Kalmia, and Ericacee are given on 
pages 416, 417. 
A corolla with the petals coalesced, as in the examples 
here given, is termed gamopetalous,: a corolla with distinct 
petals being choripetalous.? 
When anthers open by pores the dehiscence is said to be 
poricidal as in the case of capsules which open similarly. 
It will be noticed that the capsule of mountain laurel 
(Kalmia) dehisces by splitting through the partitions. Such 
dehiscence is distinguished as septicidal.* 
The fruit of wintergreen (Gaultheria) is peculiar in having 
a loculicidal capsule enveloped in a fleshy enlargement of the 
calyx and torus. ; 
The typical members of the family are woody plants, often 
aromatic; having simple, exstipulate leaves; and perfect,.gamo- 
petalous flowers, with poricidal stamens, and a compound pistil, 
superior or inferior ovary and axile placente; the fruit being 
capsular, or berry-like. 
131. The heath order (Ericales) includes several families 
associated with the above through having mostly regular and 
perfect, usually gamopetalous flowers, four to ten stamens 
nearly or quite free, the anthers mostly poricidal, and the ovary 
compound, with axile placente. 
The formula for Ericales is given on pages 416, 417. 
132. The morning-glory family (Convolvulacez) is well 
exemplified by the sweet potato (Figs. 56, 57, pages 58, 
59). : 
Formulas of Ipomcea and Convolvulacee are given on pages 416, 
417. 
The new features to be noted here are the xstivation of 
1 Gam’’o-pet’al-ous < Gr. gamos, union; petalon, flower-leaf. P). 
2 Cho” ri-pet’al-ous < Gr. choris, separate. 
3 Sep’ti-ci’’dal < L. septum, partition; cedire, cut. Indicated by the 
sign /. i 
