FAMILIES OF FLOWERING PLANTS. 73 
Family Chloranthaceae. Chloranthus Family. A small and un- 
important group, closely allied to the Pepperworts, and consisting of 
three exclusively tropical genera, embracing about 30 species. They 
are trees, shrubs, or rarely herbs. 
Family Lacistemaceae. Lacistema Family. Another small group, 
with a single genus, Lacistema, including 16 South American species. 
CHAPTER XIII. 
Orders Salicales, Juglandales and their Allies. 
Family Salicaceae. Willow Family. This is the only example of 
its order, and it consists of two genera, Salix and Populus, with nearly 
300 specis. Every one is familiar with the general appearance of the 
willows and poplars; they are all shrubs and trees, with very diverse 
foliage, and flowers in aments or 
‘“catkins’’ as they are commonly 
called. The plants are strictly dioe- 
cious, bearing the staminate and pis- 
tillate aments on different individ- 
uals. The seeds are invested with 
cottony hairs, and are produced in 
such abundance that on city streets 
where poplars are cultivated as shade 
trees the ground looks as if covered 
with driven snow during the fruiting 
season. The Salicaceae are natives 
exclusively of temperate regions, 
and are particularly abundant in 
northern. bogs and swamps. The 
uses of various exotic species of wil- 
Fic. 59.The Cottonwood or Necklace low for basket work are well-known, 
Poplar (Populus deltoides). After Britton and the industry is one of large pro- 
and Brown, Ill. Fl. Northeast U. S. 
. portions. Probably no other plants 
afford twigs of such a high degree of flexibility, combined with tough- 
ness, as the osier willow. The severed branches are very tenacious of 
life, and will invariably sprout when placed in the ground, even after 
much exposure. 
Family Myricaceae. Sweet Gale Family. This is the sole repre- 
