Difference between revisions of "Amsonia tabernaemontana var. illustris"

(Woodson) J. K. Williams

Phytoneuron 2019-13: 5. 2019.

Endemic
Basionym: Amsonia illustris Woodson Ann. Missouri Bot. Gard. 16: 407. 1929
Treatment appears in FNA Volume 14.
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|genus=Amsonia
 
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|subgenus=Amsonia subg. Amsonia
 
|subgenus=Amsonia subg. Amsonia

Latest revision as of 13:13, 24 November 2024

Stems erect, 49–88 cm. Leaves: petiole (3–)4–7 mm, sparsely to moderately pubescent with long, soft hairs or glabrous; stem leaf blades lanceolate (narrowly elliptic), (5.7–)7–12.5(–14.4) cm × 12–26(–31) mm, margins entire, weakly or not revolute, often ciliate with long, soft hairs (rarely weakly, irregularly crenulate), apex acuminate to acute, surfaces sparsely pubescent with long, soft hairs, especially on midrib, adaxially or on both surfaces, or glabrous. Flowers: sepals narrowly deltate to deltate, (0.5–)0.9–1.6(–1.9) mm, usually mostly sparsely to moderately long-pubescent, rarely all or most in an inflorescence glabrous, often glabrescent or glabrate in fruit; corolla tube 6.5–8 mm, lobes (6–)7.5–9.8(–10.5) mm. Follicles erect to pendulous, (7–)10–15 cm × 2.1–3.4(–4.2) mm. Seeds 6–8(–10.4) × (1.2–)1.5–1.7(–3.3) mm. 2n = 22.


Phenology: Flowering spring (rarely summer); fruiting summer (rarely fall).
Habitat: Gravel bars, stream beds and banks, flood plains and wetlands, low woods, glades and barrens, ditches, railroad embankments, old fields.
Elevation: 0–400 m.

Distribution

Ark., Ill., Kans., Mo., Okla.

Discussion

Variety illustris is characterized by narrow leaves and pubescent calyces; it is confined to the western portion of the range of Amsonia tabernaemontana.

Selected References

None.

Lower Taxa

None.
Linh Tõ Ngô +  and Wendy L. Applequist +
(Woodson) J. K. Williams +
Amsonia illustris +
Ark. +, Ill. +, Kans. +, Mo. +  and Okla. +
0–400 m. +
Gravel bars, stream beds and banks, flood plains and wetlands, low woods, glades and barrens, ditches, railroad embankments, old fields. +
Flowering spring (rarely summer) +  and fruiting summer (rarely fall). +
Phytoneuron +
Amsonia tabernaemontana var. illustris +
Amsonia tabernaemontana +
variety +