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Fact Sheet No. 244, UMaine Extension No. 2197

Prepared by David E. Yarborough and Timothy M. Hess, The University of Maine, Orono, ME 04469.  Replaces March 1987 by Tom DeGomez, David Yarborough and Christopher Campbell. Revised April 2002.

Choke Cherry, Prunus virginiana
Woody perennial, flowers in May.  Shrub or small tree 4’-20′ tall with dark smooth bark with white horizontal lenticels. Leaves alternate, oval to lance-shaped, bright green above, paler below and sharply toothed.  Flowers white, in dense clusters 3”-6” long.  Fruit is dark red to black.  Twigs have rank odor when crushed. Prefers moist rich soils.

Choke cherry
Figure 1: Choke Cherry
Choke cherry
Figure 2: Choke Cherry

Pin Cherry, Prunus pennsylvanica
Woody perennial, flowers April-June.  Small tree up 35′ tall, bark thin with horizontal, pinkish lenticels, twigs reddish brown with peeling grayish film, buds alternate and clustered at end of stem, leaves lustrous and lance to oval shaped, shiny yellow-green above and droop downward, margins finely toothed with inward teeth, leaf stalk has glands at base of leaf.  Flower white 1/2″ wide borne in roundish clusters.  Cherries red, small and sour with one large stone.

Pin Cherry
Figure 3: Pin Cherry
Pin cherry
Figure 4: Pin Cherry

Braken Fern, Pteridium aquilinum
Perennial, reproduces by spores and creeping rhizomes (some up to 18′ long).  Rigid leaf stalk 1′-3′ long, and swollen at base, leaf blades 2′-4′ long and 1′-3′ wide, triangular to oval shaped with or without hairs on underside, spores in light brown masses on underside of leaf blade.

Braken Fern
Figure 5: Braken Fern
Braken Fern
Figure 6: Braken Fern

Interrupted Fern, Osmuda claytoniana
Perennial, herbaceous, reproduces by spores and creeping rootstocks.  Leaves 2′-6′ long, covered with densely matted wool-like hairs when young, leaf blades oblong to lance shaped 1′-4′ long.  Spores borne on non-leafy stalks, mid-way up interrupting leaf blade, greenish at first, becoming dark brown and brittle with age.

Interrupted Fern
Figure 7: Interrupted Fern

Hay-scented Fern, Dennstaedtia unctilobula
Perennial, herbaceous, reproduces by spores and rhizomes.  Rhizomes slender and extensive, leaf stalk stout, 1′-3′ long with lanceolate blades 5″-9″ wide, oval to lance shaped with sporangia (spore cups) on leaf margins, apically thickened veins do not reach leaflet end, sweet scented when crushed, rhizomes spite and frond with spreading glandular hairs.

Hay-scented Fern
Figure 8: Hay-scented Fern
Hay-scented Fern
Figure 9: Hay-scented Fern

Information in this publication is provided purely for educational purposes. No responsibility is assumed for any problems associated with the use of products or services mentioned. No endorsement of products or companies is intended, nor is criticism of unnamed products or companies implied.

© 1987, 2002

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