Description: This woody plant is a shrub or small tree up to 20' tall with ascending to spreading branches. A large specimen has a trunk with grey bark. This bark is covered with rough flattened scales that are taller than wide. The thin grey bark of branches is often covered with scattered small bumps. Young branchlets and twigs are reddish brown and pubescent. The opposite leaves are up to 5" long and 2" across; they are ovate and smooth along their margins. The upper surface of each leaf is green, rough-textured, and sparingly covered with fine appressed hairs; there are 3-5 pairs of lateral veins that curve toward the outer margins of the leaf. The lower surface of each leaf is whitish green and densely short-pubescent (see photo). At the base of each leaf, there is a slender petiole up to 1" long.
Cymes of white flowers develop from the axils of the leaves. Each cyme is about 2-4" across and either gently rounded or flattened at the top. Each white flower is about ¼" across; it has 4 lanceolate petals, 4 stamens, and a pistil with a single style. The blooming period occurs during the late spring or early summer for about 2-3 weeks. The flowers are replaced by white fleshy drupes, which ripen during the late summer or early fall. At this time, the peduncle and pedicels of the corymb become bright scarlet. Each drupe is about ¼" across and globoid in shape; it contains a single stone. The root system normally consists of a woody branching taproot. However, if this woody plant is subjected to disturbance, it may develop suckers or underground runners that send up vegetative shoots. These vegetative shoots can develop into a colony of multistemmed shrubs.
Cultivation:
This
adaptable woody plant is typically found in partial sun and moist to
slightly dry conditions. The soil can contain loam, clay-loam, or rocky
material.
Range & Habitat:
The native Rough-Leaved Dogwood is occasional to locally common in most
areas of
Illinois, except the NE, where it is absent or uncommon (see Distribution
Map). Habitats include upland rocky woodlands, openings in
mesic woodlands, openings in floodplain woodlands, wooded areas along
rivers or streams, savannas, woodland borders, and fence rows. This
woody plant is one of the invaders of tallgrass prairies.
Faunal Associations:
The nectar and pollen of the flowers attract various bees, including
honeybees, bumblebees, little carpenter bees (Ceratina spp.),
cuckoo bees (Nomada spp.), Halictid bees, masked
bees (Hylaeus spp.),
and Andrenid bees. Other insects visiting the flowers include predatory
wasps, flies, butterflies, skippers, and beetles. Foliage and other
parts of Cornus spp. (Dogwoods) are consumed by the
caterpillars of several moth species (see Moth Table).
Similarly, beetles, scales, mites, and other small invertebrates rely
on Dogwoods as a source of food (see Insect Table). Because of their
high caloric content, the drupes of Dogwoods are very attractive to the
Wood Duck, upland gamebirds, and many songbirds; these birds can
distribute the seeds across considerable distances (see the Bird Table
for a listing of these species). Some mammals also eat the drupes,
including the Black Bear, Fox Squirrel, Gray Squirrel, Eastern
Chipmunk, and White-Footed Mouse. Finally, White-Tailed Deer and Elk
browse on the foliage and twigs of Dogwoods.
Photographic Location:
A woodland opening at Busey Woods in Urbana, Illinois.
Comments:
Rough-Leaved Dogwood occurs primarily in the Midwest and the
south-central states. It has rough pubescent leaves and bright white
drupes; the latter disappear rapidly during the fall because of their
attractiveness to wildlife. During the late spring or early summer,
Rough-Leaved Dogwood produces cymes of flowers that are quite showy;
they appear after the leaves have developed. An older scientific name
for this species is Cornus asperifolia, which
accounts for the common name. Other Cornus spp.
(Dogwoods) can be distinguished from Rough-Leaved Dogwood by the shape
of their leaves (more broad or more narrow), number of paired veins on
each leaf, and/or color of their drupes (sometimes blue or red). Their
leaves and young branchlets are usually less pubescent than those of
Rough-Leaved Dogwood.