Flower: Flower shape: 5-petals
|Also known as:
||part shade, sun; fields, prairies, along roads,
edges of woods
||June - July
||6 to 40 inches
|Wetland Indicator Status:
to 4 flowers typically form at tips of new, ground shoots and occasionally
at tips of second year lateral branches of older woody stems. Flowers
are 1½ to 2 inches across with 5 broad, rounded petals with
wavy edges often notched at the tip. The color can range from nearly
pure white to deep rose pink and often strongly bi-colored. Numerous
yellow stamens surround the shorter styles in the center. The sepals
are narrow lance-like, ½ to just under 1 inch long, rounded
at the base, the outer surface smooth. Flower stalks are smooth.
Leaves and stem:
Leaf attachment: Alternate:
leaves are attached to the stem in an alternating pattern. There
may or may not be a leaf stalk.
Leaf type: Compound:
2 or more distinct small leaves (leaflets) that arise from a single
stalk, considered 1 leaf as a whole. When 3 or more leaves arise
from a central point, it is palmately compound
are alternate and compound with 9 to 11 leaflets, occasionally 7.
Leaflets are ¾ to 1¼ inches long and ½ to ¾
inch wide, generally elliptic or widest above the middle (obovate),
rounded or blunt at the tip, with serrated edges except at the base.
Leaf stalks are ½ to just over 1 inch long and hairy. 2 wing-like
appendages (stipules) are at the base of the stalk, and sometimes
have a few scattered glands around the edge of the tip end. Upper
leaf surface is dark green and hairy to smooth, the underside light
green and hairy.
year flowering stems are green turning red the following season,
mostly simple, typically spreading to ascending. Lateral branches
are produced on older woody stems and are weak and often don't flower.
Both first and second year growth bear stiff, slender bristles of
Fruit: Fruit type:
or drupe: fleshy or pulpy fruit with an outer skin, typically round
or oval but sometimes angular. A drupe usually contains a singe
seed, berries usually have more.
round berry like fruits (rose hips) are about ½ inch in diameter,
turning bright red in late summer.
the hips are several light brown seeds that are oval to egg-shaped,
about 1/6 inch long, with a few long hairs at the ends and across
Prairie Rose establishes from seeds distributed by wildlife (typically
birds) that have consumed its nourishing fruit. Once established,
they spread out from underground rhizomes, often forming colonies.
Above ground stems rarely persist for more than a few years before
dying back to be replaced by new shoots. All three of Minnesota's
native roses appear very similar at first glance. Two primary indicators
for R. arkansana identification are its preference for open, sandy
prairie and small size which rarely gets over 18 inches and more
often just 10-12 inches. Like Prickly Wild Rose (Rosa acicularis)
it has prickles on both new and old growth but it lacks the glands
found on the leaf stalks of the latter, and their natural ranges
barely overlap along a NW to SE line through central Minnesota.
Prickly Rose is also a rather taller plant. Smooth Wild Rose (Rosa
blanda) shares the range of R. arkansana throughout the state, but
as it name suggests, Smooth Rose lacks bristles on its new growthit's
a mid-sized to tall shrub whose bristly, woody stems persist producing
showers of flowers for many years.