Amorpha confusa |
Amorpha glabra |
|
---|---|---|
savanna false indigo or indigo-bush |
Appalachian indigo-bush, mountain false indigo |
|
Habit | Shrubs, 0.3–1.4 m; arising from compact, woody root. | Shrubs, 1–2 m; arising from compact, woody root. |
Stems | finely longitudinally grooved and ridged, gland-dotted, strigulose to glabrate. |
smooth, sparsely gland-dotted or eglandular, usually glabrous, sometimes 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. |
(10–)14–22(–30) cm; stipules linear to linear-lanceolate, 2.5–4.5 mm, eglandular, slightly hairy or margins ciliate; petiole (16–)20–40(–60) mm, sparsely gland-dotted or eglandular, glabrous or sparsely puberulent; rachis sparsely gland-dotted, glabrous or, rarely, sparsely puberulent; leaflets (9–)11–15(–19), stipels acicular to setaceous, 1.2–2 mm, petiolule 2–4(–5.5) mm, sparsely gland-dotted, usually glabrous, blade often elliptic to oblong, sometimes ovate to, rarely, orbiculate, (14–)20–45(–75) × (10–)14–28(–36) mm, base round to truncate or subcordate, margins slightly revolute, entire or slightly crenulate, apex obtuse to broadly round or emarginate, surfaces gland-dotted, mostly glabrous; midvein terminated by a slightly swollen mucro, 0.2–0.4 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. |
1–3(or 4)-branched, (5–)10–18(–28) cm; rachis gland-dotted, usually glabrous; bracteoles usually narrowly lanceolate, (0.5–)0.8–1.5(–2) mm, eglandular, puberulent, often ciliate. |
Pedicels | 0.4–1 mm, eglandular, sparsely pubescent. |
(0.8–)1–2.5(–3) mm, eglandular, usually glabrous. |
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. |
calyx tube broadly turbinate to campanulate, 2–3(–3.2) mm, eglandular, glabrous except rim ciliate; lobes obscure or developed, then rounded to broadly triangular-dentate, 0–0.6(–0.8) mm; banner purplish, broadly obcordate, (4.5–)6–8(–8.5) × 4–6 mm, clawed, margins entire or erose; filaments 8–11 mm, connate basally 3–4.5 mm; anthers golden yellow to orange; ovary glabrous. |
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. |
sessile, (6.5–)7.5–9(–10) × (2.5–)3–4(–4.5) mm, margins distinctly curved outward abaxially, straight or nearly so adaxially, at least distal 2/3 gland-dotted, glabrous. |
Seeds | olive brown or brown, 2–2.3 × 1–1.5 mm, smooth, lustrous. |
not seen. |
Amorpha confusa |
Amorpha glabra |
|
Phenology | Flowering (May–)Jun–Jul. | Flowering May–Jul. |
Habitat | Pine woodlands, savannas, and road banks in outer Atlantic Coastal Plain. | Dry to moist thickets and woods, pine-oak heath ridges. |
Elevation | 0–50 m. (0–200 ft.) | (30–)400–1200 m. ((100–)1300–3900 ft.) |
Distribution |
NC; Pine woodlands; savannas; and road banks in outer Atlantic Coastal Plain |
AL; GA; NC; SC; TN
|
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.) |
Amorpha glabra is listed as a species of concern in South Carolina. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | 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) | Desfontaines ex Persoon: Syn. Pl. 2: 295. (1807) |
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