CUPRESSACEAE (Cypress Family)
Plants trees, monoecious or dioecious, evergreen or with
deciduous branchlets, resinous. Leaves alternate or opposite, scalelike or
flattened and needlelike. Megastrobili indehiscent and berrylike or conelike,
somewhat fleshy when young and dry and somewhat woody at maturity; if conelike
then maturing and shattering in a single growing season, the cone scales not
subtended by a reduced bract. Seeds 2–5 mm long [longer elsewhere], not winged.
About 27 genera, about 130 species, nearly worldwide, but most diverse in
The present treatment follows that of Eckenwalder (1976) and
some later authors in combining the traditionally recognized Cupressaceae and
Taxodiaceae under the former name. A summary of the literature on this topic
and of the rationale for this taxonomically conservative classification was
provided by Hart and Price (1990).
In addition to the species treated below a number of other
members of the Cupressaceae are cultivated as ornamentals in Missouri but have
not been recorded as established outside of cultivation. These include Italian
cypress (Cupressus sempervirens L.), various junipers (Juniperus
spp.), dawn redwood (Metasequoia glyptostroboides Hu & W.C. Cheng),
and arborvitae species (Thuja spp.).