Pediomelum cuspidatum |
Pediomelum reverchonii |
|
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largebract Indian breadroot, tallbread scurfpea |
rock Indian breadroot |
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Habit | Herbs caulescent, to 100+ cm, mostly glandular throughout, strigose becoming glabrate. | Herbs caulescent, to 150 cm, mostly glandular throughout and pubescent. |
Stems | 1+, decumbent to erect-ascending, much branched, leaves dispersed along stems; pseudoscapes rarely branched, 0–14 cm; cataphylls 0–13 mm. |
1, erect, much branched distally, leaves dispersed along stem, more so apically; pseudoscapes 0; cataphylls 5–15 mm. |
Leaves | palmately 3–5-foliolate; stipules persistent, erect to reflexed, linear-lanceolate to lanceolate, 6–15 × 1–5 mm, glandular, pubescent; petiole enlarged but not jointed basally, often canaliculate, 5–40 mm, sparsely strigose; petiolules 1.5–3.5 mm; leaflet blades oblanceolate to elliptic, oblong, or obovate, 2–4.8 × 0.5–2 cm, base cuneate, apex acute to obtuse or apiculate, surfaces abaxially pubescent, adaxially glabrous. |
palmately 3–5-foliolate; stipules tardily deciduous, linear to linear-lanceolate, 7–12 × 1–4 mm, sparsely strigose; petiole sometimes swollen but not jointed basally, 2–40 mm; petiolules 1.5–2 mm; leaflet blades narrowly elliptic, 1.3–4.5 × 0.3–1.4 cm, base obtuse to slightly cuneate, apex apiculate, surfaces abaxially tomentose, adaxially glabrous. |
Inflorescences | persistent, ellipsoid to elongate; rachis 1.5–8.5 cm, nodes (2–)6–17, 3 flowers per node, internodes to 13 mm; bracts persistent, erect to reflexed, lanceolate, 4–17 × 1–6 mm, glandular, pubescent. |
persistent, globose-ovoid, compact; rachis 0.5–0.7 cm, crowded, nodes 2, (1–)3 flowers per node; bracts persistent, orbiculate, 7–14(–20) × 6–13 mm, apex cuspidate to caudate, short-pubescent. |
Peduncles | 0.6–15 cm, longer than subtending petiole, strigose. |
1.4–2 cm, usually longer than subtending petiole, appressed-pubescent. |
Pedicels | 2–3 mm. |
3.5–5 mm. |
Flowers | 12–22 mm; calyx strongly gibbous-campanulate in fruit, 9–15 mm abaxially, 8–12 mm adaxially, glandular, pubescent; tube 4–5.5 mm; abaxial lobe lanceolate to elliptic, 8–19 × 2–3.5 mm, adaxial lobes lanceolate, 4–7 × 1–1.5 mm; corolla blue, purple, or violet, banner broadly oblanceolate to obovate, 13–21 × 7–8 mm with claw 4–6 mm, wings 12–18.5 × 3–4 mm with claw 4–7.5 mm, keel 9–13 × 4–7 mm with claw 2.5–3 mm; filaments 8–12 mm; anthers elliptic, 0.5–0.6 mm; ovary glabrous or pubescent and glandular on distal 1/4–1/3, style pubescent basally. |
14–20 mm; calyx strongly gibbous-campanulate in fruit, 11–19 mm abaxially, 10–12 mm adaxially, glandular, pubescent; tube 4–5 mm; lobes linear-lanceolate, abaxial 10.5–12 × 2–3.5 mm, adaxial 2.5–3 × 0.8–1 mm; corolla lavender, banner oblanceolate, 13–16 × 6–7 mm with claw 4–5 mm, wings 12–14 × 2.5–3 mm with claw 4–5 mm, keel 8–10 × 2.5–3 mm with claw 3.5–6 mm; filaments 8–10 mm; anthers elliptic, 0.3–0.4 mm; ovary glabrous, pubescent on distal 1/6, style pubescent basally. |
Legumes | ovoid to obovate, 6–8 × 4–4.5 mm, glandular, pubescent distally, beak 1.5–2 mm, shorter than calyx. |
ellipsoid, 7–8 × 4.5–5 mm, densely glandular, sparsely pubescent apically, beak 3–4 mm, subequal to calyx. |
Seed | reddish brown, reniform to globose, 3.5–4 × 4.5–5 mm. |
red-brown, oblong-reniform, 4 × 6 mm. |
Pediomelum cuspidatum |
Pediomelum reverchonii |
|
Phenology | Flowering spring–summer. | Flowering summer. |
Habitat | Grasslands, meadows, woodlands. | Open rocky fields, prairies. |
Elevation | 50–1500 m. (200–4900 ft.) | 200–500 m. (700–1600 ft.) |
Distribution |
CO; KS; MT; NE; OK; SD; TX
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OK; TX |
Discussion | Pediomelum cuspidatum is one of the larger species in the genus, in spite of its procumbent habit with erect-ascending, copious lateral branches. Horizontal stems are often bicolored, purple adaxially and light green abaxially. It is variable, particularly in plant height, flower length, and inflorescence length. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Pediomelum reverchonii is recognized by its large, persistent bracts and slender, branching habit. It is restricted to south-central Oklahoma and north-central Texas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Pediomelum | Fabaceae > subfam. Faboideae > Pediomelum |
Sibling taxa | ||
Synonyms | Psoralea cuspidata | Psoralea reverchonii |
Name authority | (Pursh) Rydberg in N. L. Britton et al.: N. Amer. Fl. 24: 19. (1919) | (S. Watson) Rydberg in N. L. Britton et al.: N. Amer. Fl. 24: 19. (1919) — (as reverchoni) |
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