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largebract Indian breadroot, tallbread scurfpea

rock Indian breadroot

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
from FNA
CO; KS; MT; NE; OK; SD; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
OK; TX
[BONAP county map]
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
P. argophyllum, P. aromaticum, P. californicum, P. canescens, P. castoreum, P. cyphocalyx, P. digitatum, P. epipsilum, P. esculentum, P. humile, P. hypogaeum, P. latestipulatum, P. linearifolium, P. megalanthum, P. mephiticum, P. palmeri, P. pariense, P. pentaphyllum, P. piedmontanum, P. reverchonii, P. rhombifolium, P. subacaule, P. tenuiflorum, P. verdiense
P. argophyllum, P. aromaticum, P. californicum, P. canescens, P. castoreum, P. cuspidatum, P. cyphocalyx, P. digitatum, P. epipsilum, P. esculentum, P. humile, P. hypogaeum, P. latestipulatum, P. linearifolium, P. megalanthum, P. mephiticum, P. palmeri, P. pariense, P. pentaphyllum, P. piedmontanum, P. rhombifolium, P. subacaule, P. tenuiflorum, P. verdiense
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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