Pyne's Ground-plum (Astragalus bibullatus)
Pyne's Ground-plum is also known as Guthrie's Ground-plum and Limestone Glade Milkvetch which is the official
Plant Type: This is a herbaceous plant, it is a perennial which can reach 15cm in height (6inches).
Leaves: The leaves are alternate. Leaves can reach 10cm in length (4inches). Each leaf is
pinnately divided into about 24 small
Flowers: The flowers are irregular in shape . They are bluish purple. Blooms first
appear in mid spring and continue into late spring. The flowering stems are erect at flowering but afterward droop so that
the fruit matures on the ground.
Fruit: Pods which when mature are red on the upper side and
Habitat: Rocky cedar glades.
Range: Known only from three
locations in Rutherford County Tennessee. Extremely rare.
Color Photo More Info
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This extremely rare, federal and state (Tennessee) endangered
species is known from only three natural locations in Rutherford county Tennessee. The species was first recognized as a
new species by biologist Milo Pyne (then Milo Gutherie) in 1988. Since then two other locations have been found. One, Flat
Rock Cedar Glade, is now protected (see 'More Info' below). There were likely other locations early in the 1900s. It seems
that the early Tennessee botanist Augustin Gattinger collected the plant in 1901 form a location near the La Vergne railroad
station which is also in Rutherford county and a specimen was collected in 1948 from a location in Davidson county
Tennessee which is now under Percy Priest Reservoir.
Similar Species: Tennessee
Milkvetch, Astragalus tennesseensis has cream or yellowish flowers, yellow brown fruit and is hairy.
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By: Newcomb, Lawrence and Illustrated by Morrison, Gordon. 1977, Little, Brown and Company, ISBN:0-316-60442-9
One of the best general guides to wildflowers of the North Eastern and North Central United States. Newcomb's key
is an excellent, simple method for identifying plants. Newcomb has drawings for almost every plant mentioned that
are excellent aids to identifying the species. Though only the more common plants are covered this is often the first
book I pick up when trying to identify a wildflower.
wers of Tennessee the Ohio Valley and the Southern Appalachians
By: Dennis Horn and Tavia Cathcart and Thomas E. Hemmerly and David Duhl. , ISBN:1551054280
This is perhaps the best of many field guides covering this region. Featuring 446 excellent color photographs (located
with the text) and mentioning as similar to those illustrated are another 800 or so species for a total coverage of over
1,200 species. The start of each family section includes line drawings of some of the species showing important
features. The text includes the usual description, bloom season, range, habitat and additionally includes information
such as medical uses and lore and how the species was named. This is the official field guide of the Tennessee
Native Plant Society.
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