Astragalus nuttallianus var. zapatanus |
Astragalus sect. Leptocarpi |
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loredo milkvetch, turkeypeas |
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Habit | Plants hirsutulous, hairs 0.4–0.8 mm. | Herbs annual, biennial, or perennial, caulescent; caudex superficial. |
Stems | 2–30 cm. |
single or few to many. |
Leaves | 1.5–4.5(–5) cm; leaflets (7 or)9–17, blades narrowly cuneate to oblong, oval, or oblong-cuneate, apex retuse or deeply emarginate. |
odd-pinnate, petiolate to subsessile; leaflets (3 or)5–25(or 27). |
Racemes | 1–4-flowered; axis very short in fruit. |
subumbellate or loosely flowered, flowers ascending, spreading, or declined. |
Peduncles | (0.2–)0.5–4.5 cm. |
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Flowers | calyx 3–4.6 mm, pilosulous, tube 1.6–2.7 mm, lobes 1.5–2.1 mm; corolla banner (4–)4.9–6.7 mm; keel apex triangular, slightly beaklike. |
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Corollas | usually pink-purple, purple or purple-tinged or -tipped, ochroleucous, or lilac, rarely whitish, banner recurved through 20–80°, keel apex acute, round, deltate, or triangular-acuminate, sometimes slightly beaklike. |
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Calyx | tubes campanulate. |
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Legumes | 13–18 × 2.6–3.2 mm, loosely strigulose. |
deciduous, usually sessile, rarely short-stipitate, short gynophore sometimes present, ascending, spreading to declined, incurved-ascending, or pendulous, mostly linear to linear-oblanceoloid, oblong, or crescentic, sometimes 3-sided, rarely ellipsoid or fleshy, straight or incurved, rarely slightly decurved, compressed laterally, slightly 3-sided or subterete, bilocular. |
Seeds | 10–16. |
(2–)4–30. |
Hairs | basifixed or malpighian. |
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Stipules | distinct. |
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Astragalus nuttallianus var. zapatanus |
Astragalus sect. Leptocarpi |
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Phenology | Flowering Feb–Mar. | |
Habitat | Sandy, frequently disturbed sites. | |
Elevation | 0–200 m. (0–700 ft.) | |
Distribution |
TX; Mexico (Tamaulipas) |
w United States; se United States; n Mexico |
Discussion | Variety zapatanus occurs in the lower Rio Grande Valley from Laredo to the Gulf Coast and into northeastern Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 24 (18 in the flora). Section Leptocarpi is complex morphologically, with eight subsections recognized, one of them, subsect. Coahuilani Barneby, occurring only in northern Mexico. The subsections within the flora area are: subsect. Pringleani Barneby (Astragalus nothoxys); subsect. Arizonici Barneby (A. arizonicus); subsect. Mohavenses Barneby (A. albens, A. mohavensis); subsect. Parvi Barneby (A. hypoxylus); subsect. Tricarinati (Rydberg) Barneby (A. bernardinus, A. tricarinatus); subsect. Californici (A. Gray) Barneby (A. acutirostris, A. breweri, A. claranus, A. emoryanus, A. pauperculus, A. rattanii, A. tener); and subsect. Leptocarpi (M. E. Jones) Barneby (A. leptocarpus, A. lindheimeri, A. nuttallianus, A. nyensis). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Subordinate taxa | ||
Name authority | Barneby: Field & Lab. 24: 36. (1956) | M. E. Jones: Rev. N.-Amer. Astragalus, 266. (1923) |
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