Flora of North America species comparison

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Amsonia hubrichtii

Hubricht's bluestar
Stems

erect, (35–)52–130 cm, glabrous;

branches borne on distal portion of stem, much exceeding infructescence.
Leaves

petiole 0–3(–4) mm, glabrous;

blades slightly heteromorphic;

stem leaf blades linear, (5–)7.5–11 cm × 2–3.2(–4.2) mm, margins entire, revolute, not ciliate, apex narrowly acute, surfaces glabrous or sparsely short-pubescent on midrib and veins adaxially;

branch leaf blades linear, 5–10.5 cm × (0.8–)1–1.8(–2.4) mm.
Flowers

sepals deltate to narrowly deltate, 0.7–1.5 mm;

corolla tube blue (to purplish), 6–8 mm, lobes blue (to white, purplish), (4.5–)5.4–7.8 mm, outer surface of corolla glabrous.
Seeds

7.5–11 × 1.6–2.2 mm.
Follicles

pendulous or erect, 7.5–13.8 cm × 2.5–3.4 mm, apex acute, glabrous.

Amsonia hubrichtii
Phenology Flowering spring; fruiting summer.
Habitat Stream banks, bottoms, shaley creek beds, gravel bars and spits, moist glades.
Elevation 100–400 m. (300–1300 ft.)
Distribution
from FNA
AR; OK
[WildflowerSearch map]
[BONAP county map]
Discussion

Amsonia hubrichtii resembles A. ciliata var. filifolia but is a much larger plant, with longer, adaxially lustrous leaves, and with narrower ecological preferences. It is confined to central and western Arkansas and southeastern Oklahoma.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 14.
Parent taxa Apocynaceae > Amsonia > subg. Amsonia
Sibling taxa
A. arenaria, A. ciliata, A. fugatei, A. grandiflora, A. jonesii, A. kearneyana, A. longiflora, A. ludoviciana, A. palmeri, A. peeblesii, A. rigida, A. tabernaemontana, A. tharpii, A. tomentosa
Name authority Woodson: Rhodora 45: 328. (1943)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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