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largebract Indian breadroot, tallbread scurfpea

Paria Plateau Indian breadroot, Paria River Indian breadroot

Habit Herbs caulescent, to 100+ cm, mostly glandular throughout, strigose becoming glabrate. Herbs acaulescent or subacaulescent, 2–9 cm, mostly glandular and strigose throughout.
Stems

1+, decumbent to erect-ascending, much branched, leaves dispersed along stems;

pseudoscapes rarely branched, 0–14 cm;

cataphylls 0–13 mm.

short-erect, rarely branched (when branched then branches subtended by cataphylls), leaves clustered;

pseudoscapes to 2.5 cm;

cataphylls 6–11 mm, glabrous.

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 persistent, obovate to oval, 4–10 × 2.5–6 mm, glabrous or sparsely pubescent;

petiole not enlarged but jointed basally, slightly canaliculate, 13–70 mm;

petiolules 0.5–1 mm;

leaflet blades obovate, 0.9–2.5 × 0.7–2.2 cm, base cuneate or attenuate, apex rounded or emarginate, surfaces abaxially gray-green and evenly strigose, adaxially yellow-green and strongly white-strigose along veins.

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.

disjointing in age at peduncle base, globose;

rachis 0.5–8.5 cm, elongating through fruiting, nodes (1 or)2–6, 3 flowers per node, internodes 1–3 mm;

bracts tardily deciduous or persistent, oblanceolate to elliptic, 4–8 × 3–4 mm, apex abruptly acuminate, short-pubescent.

Peduncles

0.6–15 cm, longer than subtending petiole, strigose.

2–4.5 cm, shorter than subtending petiole, pubescent.

Pedicels

2–3 mm.

2–5 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.

8–12.5 mm;

calyx broadly gibbous-campanulate in fruit, 10–11.5 mm abaxially, 8–8.5 mm adaxially, eglandular or sparsely glandular, pubescent;

tube 3.3–4.5 mm;

lobes lanceolate or oblanceolate, abaxial 4–6.5 × 2–3.5 mm, adaxial 3–5 × 1–1.5 mm;

corolla ochroleucous, wings and keel suffused purple or purple, banner broadly orbiculate to obovate, (8.5–)10–14 × 5.5–7.5 mm with claw 2.5–3 mm, wings 9–11 × 2.5–3 mm with claw 3.5–4 mm, keel 8–8.5 × 2.5–3 mm with claw 3–4 mm;

filaments 7–8 mm;

anthers broadly elliptic, 0.4 mm;

ovary pubescent apically, 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, 6–7 × 4–4.5 mm, eglandular, strigose, beak 3–4 mm, not exserted beyond calyx.

Seed

reddish brown, reniform to globose, 3.5–4 × 4.5–5 mm.

gray-green to brown, obovoid, 4.5–5 × 2.5–3 mm, shiny.

Pediomelum cuspidatum

Pediomelum pariense

Phenology Flowering spring–summer. Flowering spring–summer.
Habitat Grasslands, meadows, woodlands. Barren outcrops in open pine-juniper woodlands.
Elevation 50–1500 m. (200–4900 ft.) 1700–2500 m. (5600–8200 ft.)
Distribution
from FNA
CO; KS; MT; NE; OK; SD; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
UT
[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 pariense is known from Garfield, Kane, and Washington counties. It much prefers open, barren rocky soils, particularly limestone and is considered rare, with fewer than 20 populations known. A few known populations inhabiting the high-elevation escarpment ridges of Bryce Canyon National Park are assured protection, but the bulk of populations exist on the lower steps of the Grand Staircase-Escalante area, areas that may become targets for mining and oil developments. In 2005 and 2006, considerable effort was spent to seek out new populations but without success.

(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. pentaphyllum, P. piedmontanum, P. reverchonii, P. rhombifolium, P. subacaule, P. tenuiflorum, P. verdiense
Synonyms Psoralea cuspidata Psoralea pariensis
Name authority (Pursh) Rydberg in N. L. Britton et al.: N. Amer. Fl. 24: 19. (1919) (S. L. Welsh & N. D. Atwood) J. W. Grimes: Brittonia 38: 185. (1986)
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