171 
PARK AND CEMETERY 
GARDEN PLANTS.— THEIR GEOGRAPHY— 
LXXI. 
Urticales. 
The Ulmus, Artocarpus, and Platanus Alliance. 
This group has eleven tribes, 114 genera, and 1,577 
species. They agree with their series in having sep- 
PI.ATANUS OCCIDENTALIS, UI.MUS AMERICANA, AND DEETIS 
OCCIDENTAEIS. 
arate staminate and pistillate flowers, yet most of 
the tribes present well marked characters. The com- 
pound pistil common in Euphorbiales becomes sim- 
ple. Their flowers are variously arranged but not 
showy. Some are in fascicled clusters, some in droop- 
ing or upright spikes, some seated upon a remark- 
able stamp-like flattened receptable as in Dorstenia. 
Some have their flowers clustered within the fruity 
receptacle, as in figs, or in dense heads as in osage 
orange and mulberry. In Platanus, the round “but- 
tonball” heads are suspended by long footstalks. The 
Artocarpeae or bread fruit tribe presents several mod- 
ifications of similar characters. Milkiness is com- 
mon in some tribes, in others watery juices prevail. 
Nettles differ more in their stinging hairs and herba- 
ceous habits than in the structure of their flowers, 
while their foliage often suggests the elms and “nettle 
trees” of northern regions. They are by no means 
gardens plants. 
Large evergreen trees are more common in this 
group than among Euphorbias, and in tropical coun- 
tries the variety of habit is great, with plenty of 
shrubs, climbers and a few good herbs. In temperate 
regions quite a variety of forms may be selected for 
ornamental grounds, but we are entering upon a por- 
tion of the system which yields a large proportion of 
the deciduous forest trees of the northern hemisphere, 
excellently well adapted to park and woodland plant- 
ing, while several are of great utility on the prairies. 
Ulmus “elm” has sixteen species in three sections. 
They are found in most parts of the northern hemis- 
phere, have been largely planted, and vary exceed- 
ingly. The European and Asiatic species, U. campes- 
tris and U. montana particularly have about thirty 
well marked varieties each, and some are extreme 
forms, pyramidal and pendulous, with micropyllas, 
latifolias, tortuosas, betulifolias and myrtifolias among 
the campestris ; and among the monta nas such as 
atropurpurea, aurea, laciniata. macrophylla, nana, 
fastigiata and pendula. American kinds probably vary 
as much, but they have not been so closely selected. 
Elms are unfortunately liable to insect pests in some 
parts of the middle Atlantic states, but northward the 
street avenues are often superb. 
Planera aquatica is a monotypic small tree found 
in wet places along rivers from North Carolina and 
Southern Illinois southward. 
Zelkova has four species in Crete, the Caspian re- 
ZEEKOVA ACUMINATA. — Garden and Forest. 
1, a staminate. 2, a frniting’ branch. 
gions, and Eastern Asia. Some are good trees, but 
there is a likelihood of these being visited by the same 
pests as the elms. 
Celtis “nettle trees,” have seventy species scattered 
