Amorpha confusa |
|
---|---|
savanna false indigo or indigo-bush |
|
Habit | Shrubs, 0.3–1.4 m; arising from compact, woody root. |
Stems | finely longitudinally grooved and ridged, gland-dotted, strigulose to glabrate. |
Leaves | (8–)12–20(–26) cm; stipules sometimes persistent, linear or setaceous, (1–)1.5–2(–2.5) mm; petiole (6–)8–15(–20) mm, gland-dotted, puberulent or glabrous; rachis sparsely gland-dotted, puberulent or glabrous; leaflets (11–)15–31(–35), stipels acicular or setaceous, 0.8–1.8 mm, petiolule 0.7–1.5(–1.8) mm, gland-dotted, mostly puberulent or glabrous, blade elliptic to oblong or ovate to suborbiculate, (10–)15–25(–35) × (7–)9–15(–18) mm, base truncate or round to subcordate, margins usually revolute, entire or inconspicuously crenulate, apex round to obtuse or emarginate, surfaces sparsely to conspicuously gland-dotted, usually glabrous or glabrate, sometimes sparsely pubescent abaxially; midvein terminated by a slender mucro, (0.2–)0.4–1 mm. |
Racemes | (1–)3–5(–8)-branched, 10–20(–30) cm; rachis sparsely gland-dotted, puberulent; bracteoles linear to narrowly subulate, 1.5–2.5(–3) mm, usually eglandular, sparsely pubescent or sparsely ciliate. |
Pedicels | 0.4–1 mm, eglandular, sparsely pubescent. |
Flowers | calyx tube turbinate to narrowly campanulate or cylindric, 1.7–2.2 mm, distal 1/3–2/3 rarely gland-dotted, glabrous; lobes: abaxial lobe acuminate, slightly longer, adaxial lobes triangular to acuminate, 0.4–1.2(–1.5) mm, margins densely ciliate; banner bright blue, broadly obovate to obcordate, (4–)5–6 × 3–3.5(–4) mm, distinctly clawed, margins entire or finely erose; filaments 5–8 mm, distinct; anthers yellow; ovary pubescent. |
Legumes | sessile or stipitate, 4–5.5 × 2–2.5 mm, margins curved outward abaxially, straight adaxially, at least distal 1/2–2/3 gland-dotted, glabrous. |
Seeds | olive brown or brown, 2–2.3 × 1–1.5 mm, smooth, lustrous. |
Amorpha confusa |
|
Phenology | Flowering (May–)Jun–Jul. |
Habitat | Pine woodlands, savannas, and road banks in outer Atlantic Coastal Plain. |
Elevation | 0–50 m. (0–200 ft.) |
Distribution |
NC; Pine woodlands; savannas; and road banks in outer Atlantic Coastal Plain |
Discussion | Amorpha confusa is known presently only from Brunswick and Columbus counties; it is believed to be extirpated in adjacent South Carolina. The taxon is a Federal species of concern and is listed as threatened in North Carolina. It is usually encountered growing in loamy soils, most often of the Foreston soil series. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. |
Parent taxa | |
Sibling taxa | |
Synonyms | A. georgiana var. confusa |
Name authority | (Wilbur) S. C. K. Straub: Sorrie & Weakley, J. Bot. Res. Inst. Texas 3: 154. (2009) |
Web links |