PARK AND CEMETERY 
258 
about five feet from the ground. Two nails are used in- 
serted in the two holes that were for the rivets. A very 
thin piece of mica is used to prevent contact of the 
card label and nail heads. 
“The method adopted for protecting the printed label 
is simply the insertion of a thin piece of mica of the 
same size in front of the label. Though water enters at 
the ends behind the mica and dampens the label during 
every rain it is not at all to the detriment of the print- 
ing. It will be many months before the discoloration 
of the card is such that a fresh label need be inserted. 
Renewal once a year will be sufficient, though to change 
them both in early spring and early fall gives better sat- 
isfaction. The size adopted for our greenhouse plants 
is one by two and a half inches and for outdoor plants 
two by four and one-half inches. The iron stakes are 
painted black before riveting on the label holders. The 
mica should press close to the card label otherwise the 
moisture will condense and collect in visible quantities 
when the sun shines directly on it. The labels we use 
in the Botanical Department gives the common name in 
large black type occupying one line, and below this in 
smaller tyjre the scientific name is given, also the family 
to which the species belongs and the country in which 
it is indigenous.” 
The subject of properly labeling trees and plants in 
our public places, and the necessity for so doing in or- 
der to seen e the educational values, is one that is re- 
ceiving much attention. It is a matter of considerable 
importance. 
GARDEN PLANTS— THEIR GEOGRAPHY, L. 
POLEMONIALES. 
THE POLEMONIUM, CONVOLVULUS AND SOLANUM 
ALLIANCE. 
( Concluded) . 
locJiroma, in 15 species, 
are from the Andean regions 
of tropical America. I. fuch- 
sioides and others are shrubs 
with orange, scarlet and pur- 
ple flowers. One or two are 
in California. 
Solandra is a genus of 
South American shrubs and 
climbers. S. grandiflora prom- 
ises well in southern Cali- 
fornia. 
Datura has 12 species, 
some of which have become 
cosmopolitan in warm regions. 
The large shrubby drooping 
flowered kinds have, some of 
them, become naturalized on 
the Mexican border. S. su- 
aveolens is sometimes hardy 
as to its roots at the lower 
south. S. sanguinea, Peruvian originally, al- 
though hardier in constitution, is less commonly 
seen in the states for some reason. There are sev- 
eral large flowered, sometimes fragrant annuals 
more or less grown. 
Cestruin is a large genus, which now includes 
Habrothamnus, several are in cultivation and one 
or two are naturalized in the southwest. 
Nicotiana is the tobacco genus with about 40 
species in tropical America, the Pacific Islands and 
Australia. Several are adventive or native to the 
warm parts of the United States. Several have 
fine foliage, and some have fragrant showy flowers, 
such as N. alba, upright, and N. sylvestris, 
drooping. 
Fabianah.d.-i, ii species natives of Chili, Bolivia 
and Brazil. 1 '. imbricata seems to be the only one 
cultivated. It is a pretty ericoid shrub with white 
flowers. It is apt to get bare at bottom, however, 
and should have attention in pruning and frequent 
propagation. 
The Salpiglossideae contains many plants of 
such favorite garden genera as Pemnia, Nierem- 
bergia, Schizanthus, Salpiglossis, Browallia, Strep- 
tosolon, Brunsfelsia and some others, which have 
often been included in the alliance which is to 
follow. It will be seen by the mere enumeration 
that there can be no difficulty in furnishing the 
groups with showy plants. In the absence of good 
e.xamples the difficulty lies in appreciating the 
possibilities. 
Ja Hit's Mac Filer son . 
XICOTl.\N.\S. 
Tomenlosa. 
Sylvestris. 
T. Varis^ata, 
