203 
PARK AND CEMETERY. 
some small tree or shrub. It is rather hard to es- 
tablish in tree form at the north, and nurserymen 
are not always careful to keep clean well trained 
young plants. The scrubby stuff should be cut 
down .to the roots, and allowed to grow up again 
in bush form. It is found along the Alleghanies 
ERICA MELANTHERA NIGRESCENS. 
E. VENTRICOSA VAR. E. INTERMEDIA. 
from Pennsylvania southward, has light green foli- 
age and racemes of elegant whitish flowers, and no 
tree colors more beautifully during the autumn. 
Where it succeeds it will be especially useful for 
grouping among Rhododendrons. 
Epigea, the “Mayflower” has 2 species in North 
America and Japan. The flowers are deliciously 
scented, and are largely sold in the city markets of 
the middle Atlantic States. The plants are deemed 
hard to establish in gardens. In British gardens 
they are easy, and usually transplanted during 
autumn. Some nurserymen keep stock in pots. It 
prefers gravelly sandy scrub land. 
Lyonia paniculata is now considered the correct 
name for the Andromeda ligustrina of some botan- 
ists, and- Zenobia speciosa has superseded the A. 
speciosa of Michaux, and the A. pulverulenta var. 
of Bartram, 
Andromeda polifolia is a monotypic narrow 
leaved evergreen found in cold boggy places in 
northern temperate and sub-Arctic regions. It 
varies considerably, and is probably far more re- 
sponsible for the accepted British ideas of the 
“American garden” than any other plant. 
Pieris has io species in North America, Japan, 
and the mountains of other Asiatic countries. The 
genus absorbs the “stagger bush,” A. mariana, found 
from Rhode Island to Florida, and also the species 
sold as A. Japonica, A. floribunda, A. formosa, 
and others. Pieris Japonica has a variegated form 
They are often useful and pretty evergreens, doing 
well in partial shade. 
Enkianthns has 5 species, natives of Japan, 
China and the eastern Himalaya. They are best 
adapted to points on the Pacific Coast, and possi- 
bly the Japanese E. campanulatus, E. cernuus, and 
the Himalayan E. ovalifolia may do well in the 
southern states. 
Calluna vulgaris is now regarded as monotypic, 
and is one of the commonest “heathers” of Europe, 
Northwestern Asia, the Azores, and strange to say 
(sparsely) also of the New England States, Nova 
Scotia and Iceland. It sometimes establishes itself 
very well in gardens as far south as Philadelphia at 
least. 
Erica is a large genus of 400 species chiefly 
found in South Africa, the Mediterranean regions, 
and northwards to the British Islands and the Cau- 
casus. 
I cannot begin to do them justice in these papers. 
All of the writings have failed to do them justice. 
But may I point out to Californian friends that 
many of the African species and their varieties are 
particularly well worth their attention, for if then- 
roots have freedom they often endure extreme 
drought — when established. 
The British dictionaries and catalogues have 
mentioned nearly 500 species and varieties of cape 
heaths as having been under cultivation in those is- 
lands as cool greenhouse plants; and about 30 spec- 
ies and vars. of the European ones as hardy in their 
gardens. 
Trenton, N. J. Janies Mac P her son. 
It has been observed that the relative frequency 
with which trees are struck by lightning varies with 
the species, and it is suggested by the St. Louis 
Globe Democrat that the division of P'orestry at 
Washington should investigate the question. Itises- 
timated that if the beech is represented by 1 , the pine 
stands at 1 5 ; trees collectively rank about 40 and oaks 
54. The trees struck are not necessarily the high- 
est or the most prominent. Trees have been struck 
before rain began and split, and trees have been 
struck during rain and only scorched. The divis- 
ions of forestry and of vegetable pathology might 
combine with the weather bureau in an exhaustive 
investigation of this subject, and that those familiar 
with forests in their respective neighborhoods ten- 
der their experience as to the relative frequency 01 
lightning strokes on different kinds of trees. But 
before any statement is made as to the relative 
danger of standing under certain trees during thun- 
der storms, the more general questions of the 
effect of lightning upon trees will have to be 
gone in to. 
