270 L. ERICACEAE. [Erica. 
leaves, without stipules. — Many are astringent and diuretic, 
some poisonous, as Rhododendron and Kalmia. 
* Corolla marcescent. Fruit dry, capsular. 
1. Erica. Calyx simple. Capsule loculicidal, dissepiments adhering to 
the valves. 
2. Caixuna. Calyx double (surrounded by 4 coloured bracteas similar 
to the calyx). Caps, septicidal, dissepiments detached from the 
valves. 
* * Corolla deciduous. Fruit dry, capsular. 
3. Menziesia. Cor. ventricose. Stam. 8—10. Caps. 4— 5-celled, septi- 
cidal ; valves entire. 
4. Azalea. Corolla campanulate. Stam. 5. Caps. 2 — 3-celled, septi- 
cidal ; valves bifid. 
5. Andromeda. Cor. ovate or campanulate. Stam. 8 — 10. Caps, lo- 
culicidal. 
*** Cor. deciduous. Fruit fleshy, indehiscent. 
6. Arbutus. Cells of berry many-seeded. 
7. Arctostaphylos. Cells of berry 1-seeded. 
1. Erica Linn. Heath. 
Cal. of 4 leaves. Cor. campanulate or ovate, often ventri- 
cose, marcescent. Capsule 4-celled, 4-valved, loculicidal, dis- 
sepiments adhering to the middle of the valves.— Named from 
sptiKO), to break, because it was formerly supposed to have the 
power of destroying calculi in the bladder. 
* Mouth of the corolla oblique. Anthers included, or nearly so. 
1. E. cilidris L. ( ciliate II.) ; anthers without awns bifid 
included, corolla ovate inflated, leaves ovate 4 in a whorl ciliato- 
glandulose, flowers in terminal unilateral racemes, ovary gla- 
brous. E. B. S. t. 261 8. 
Near Truro and Penryn, frequent, and on the north coast of Corn- 
wall ; near Corfe Castle, Dorset; near Clifden, Galway, Ireland, h- 
6, 7. — The flowers are as large as those of Menziesia carulea, and 
more highly coloured; while the leaves are elegantly fringed with 
hairs, and each hair is tipped with a gland. Growing along with 
this and E. Tetralix, Mr. H. Watson finds at Truro a hybrid between 
them, having sometimes the cor. and the racemes of the present species, 
with the leaves, pubescent ovary, and awned anthers of the next, but 
varying in these respects. 
** Mouth of corolla straight. Anthers included, or nearly so, awned at 
the base. 
2. E. Tetralix L. ( Cross-leaved II.) ; anthers with two acute 
awns at the base included, corolla ovate as long as the style, 
leaves 4 in a whorl linear revolute at the margin ciliate, flowers 
