Hoffmannseggia glauca |
Hoffmannseggia drepanocarpa |
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hoffmanseggia, hog potato, Indian rushpea, pig-nut |
sickle-pod rush-pea, sicklepod holdback |
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Habit | Herbs, 5–30(–50) cm; from deep taproot, producing round, tuberlike spheres to 2 cm. | Herbs, 8–30 cm, with very short internodes, appearing almost fasciculate; from taproot. |
Leaves | 38–150 ×13–42 mm; stipules ovate, 1.5–4 × 1.5–3 mm, ciliate; pinnae 4–13; leaflets 7–27 per pinna, blades obtuse-ovate, 2–6 × 1–4.5 mm, surfaces strigose abaxially, glabrous adaxially. |
30–100 × 13–30 mm; stipules lanceolate, 2–3 × 1–1.3 mm; pinnae 7–9; leaflets 9–19 per pinna, blades obtuse-ovate, 1–5.5 × 1–2.3 mm, surfaces glabrous or sparsely strigose abaxially, glabrous or sparsely pubescent adaxially. |
Racemes | 4–15-flowered, terminal, 5–23 cm; rachis and pedicels puberulent to strigose and stipitate-glandular. |
3–11-flowered, terminal, 6–27 cm; rachis and pedicels strigose, eglandular. |
Flowers | turning downward, broadly flared, 10–16 × 10–18 mm; calyx persistent, densely pubescent abaxially, with multicellular, glandular trichomes; banner yellow, drying pink with red markings, 5–14 × 5 mm, conspicuous multicellular, glandular trichomes on claw and abaxial surface, with few hairs at base of folded claw adaxially; lateral petals bright yellow, 13 × 6 mm, with multicellular, glandular trichomes on claw margins and base abaxially. |
turbinate, 6–9 × 3.5–5 mm; calyx persistent, often roseate to burgundy, distinct portion 3–5 × 1–2 mm, pubescent to strigose abaxially, eglandular; banner yellow, sometimes tinged with red, 5–8 × 2.5–4.5 mm, glabrous abaxially, with small tuft of trichomes at base of claw adaxially; lateral petals yellow, sometimes tinged red, 6.5–8 × 2–5 mm, glabrous abaxially. |
Legumes | tan, rectangular to arcuate, sometimes expanded near apex, 20–40 × 5–8 mm, indehiscent, margins ± parallel, obscure, apex obtuse to acute; valves flat, sparsely tomentose, with a few scattered multicellular, glandular trichomes appearing as brown dots. |
flat, arcuate, sometimes forming nearly a full circle, pale brown or reddish, falcate, 23–40 × 5–8 mm, indehiscent, margins parallel, pronounced, puberulent, apex round, with remnants of withered style; valves reticulate, puberulent. |
Seeds | 1–10. |
6–11. |
2n | = 24. |
= 24. |
Hoffmannseggia glauca |
Hoffmannseggia drepanocarpa |
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Phenology | Flowering spring. | Flowering spring (late summer). |
Habitat | Disturbed areas. | Grasslands in sandy or clay limestone soils. |
Elevation | 0–3000 m. (0–9800 ft.) | 900–2000 m. (3000–6600 ft.) |
Distribution |
AZ; CA; KS; NM; OK; TX; Mexico; South America (Argentina, Bolivia, Chile, Peru)
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AZ; CO; KS; NM; TX; Mexico (Chihuahua, Coahuila)
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Discussion | Hoffmannseggia glauca is considered a noxious weed in agricultural and pasture lands of the middle and southwestern United States, spreading aggressively by tuberous roots. While it is possible that it was introduced into North America by humans, historical use of the tubers by indigenous people in the American Southwest indicates a long association and, perhaps, natural long-distance dispersal from South America. Hoffmannseggia falcaria Cavanilles, an illegitimate and superfluous name, pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Caesalpinioideae (excluding Mimosoid clade) > Hoffmannseggia | Fabaceae > subfam. Caesalpinioideae (excluding Mimosoid clade) > Hoffmannseggia |
Sibling taxa | ||
Synonyms | Larrea glauca, Caesalpinia falcaria var. capitata, C. falcaria var. pringlei, C. falcaria var. rusbyi, H. densiflora, H. falcaria var. capitata, H. falcaria var. pringlei, H. falcaria var. rusbyi, H. stricta, H. stricta var. demissa | Caesalpinia drepanocarpa, Larrea drepanocarpa |
Name authority | (Ortega) Eifert: Sida 5: 43. (1972) — (as Hoffmanseggia) | A. Gray: Smithsonian Contr. Knowl. 3(5): 58. (1852) — (as Hoffmanseggia) |
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