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Amsonia hubrichtii Woodson

Thread-leaf blue star amsonia, Hubricht’s bluestar

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassAsteridaeA large class that encompasses asters
OrderGentianalesGentians, coffee, gardenias, frangipani, many others
FamilyApocynaceaeDogbane family
GenusAmsoniaBluestars; named for botanist Charles Amson
SpecieshubrichtiiNamed for naturalist Leslie Hubricht

About plant names...

The thread-leaf blue star was originally found in 1942 by Leslie Hubrict, for whom the species is named. It is found only in Arkansas and Oklahoma in the US.

Identification: The flowers are a light blue-gray color, tending toward white later in the season. The flowers have five sharp petals, and occur in masses. Leaves are narrow, similar to needles, and turn brilliant yellow in the fall. Thread-leaf blue star looks similar to blue star (Amsonia ciliata), but has more needle-like foliage. Blue star has a wider range in the southeastern US, while the thread-leaf species is only present in AK and OK. Both of these plants are frequently called blue star.

Online References:

Amsonia hubrichtii on www.northcreeknurseries.com

Amsonia hubrichtii at the Missouri Botanical Garden

Amsonia hubrichtii at the Kemper Center for Home Gardening

Amsonia hubrichtii on extension.illinois.edu


Amsonia hubrichtii description by Thomas H. Kent, last updated 6 Sep 2021.

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Amsonia hubrichtii (thread-leaf blue star amsonia, Hubricht’s bluestar)

8/1/2009 · Coastal Maine Botanical Gardens, Boothbay, Maine
≈ 3½ × 2' (1 × 0.7 m)

Range: Zones 3-9:

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