Amsonia species

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Scientific Name Amsonia ciliata USDA PLANTS Symbol
AMCI
Common Name Texas Bluestar, Fringed Bluestar ITIS Taxonomic Serial No.
30133
Family Apocynaceae (Dogbane) Wildflower Center Ref.
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Description Habitat: Limey soils in open slopes and prairies in the Hill Country and North Texas.
Plant: Erect perennial 15 to 24 inches tall.
Leaves: Very narrow, smooth, soft leaves borne singly, but very close together all the way up to the flower cluster.
Inflorescence: Pale blue flowers with a narrow 1/2-inch long tube opening into 5 petal-like lobes in a star shape l/2-inch across with a ring of white at the center.
Bloom Period: March and April.
References: Descr. excerpt from www.wildflower.org and "Wildflowers of the Texas Hill Country" by Marshall Enquist.
Texas Status
Native
Scientific Name Amsonia longiflora USDA PLANTS Symbol
AMLO
Common Name Tubular Bluestar ITIS Taxonomic Serial No.
30141
Family Apocynaceae (Dogbane) SEINet Reference
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Description Habitat: Limey soils in open areas and clay soils; washes, ravines, slopes of the Trans-Pecos and Central Texas.
Plant: Erect perennial 8 to 24 inches tall, multiple smooth stems from woody base.
Leaves: Alternate, smooth, linear-lanceolate to filiform, 3/4 to 2 inches long.
Inflorescence: Pale blue, rarely white, flowers about one inch across in terminal clusters with a narrow long tube 1 to 1-1/2 inches long opening into 5 petal-like lobes in a star shape; slender corolla tube is constricted at its opening.
Blooming Period: March to May.
References: Descr. excerpt from Shinners & Mahler’s Illustrated Flora of North Central Texas, and "Manual of Vascular Plants of Texas" by Correll and Johnston.
Texas Status
Native
Scientific Name Amsonia palmeri USDA PLANTS Symbol
AMPA5
Common Name Palmer's Bluestar ITIS Taxonomic Serial No.
30143
Family Apocynaceae (Dogbane) SEINet Reference
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Description Habitat: Sandy or rocky soils in open areas the Trans-Pecos region.
Plant: Erect perennial 12 to 32 inches tall, multiple smooth to pubescent (covered with small hairs) stems from woody base.
Leaves: Alternate, narrowly oblong-lanceloate to linear-lanceolate up to 2-3/4 inches long; lower leaves broader.
Inflorescence: Congested terminal cluster of small, very pale blue to white flowers from 1/4 to 1/2-inch across inch across; corolla tube (below lobes) 3/8 to almost 3/4-inch long opening into 5 lobes with small hairs on edges arranged in a star shape. Corolla tube is swollen in the middle and constricted at its opening.
Bloom Period: March to May.
References: Descr. adapted from "Manual of the Vascular Plants of Texas" by Correll and Johnston and SEINet.
Texas Status
Native

© Tom Lebsack 2018