Astragalus lentiginosus var. chartaceus |
Astragalus lentiginosus var. trumbullensis |
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broadleaf milkvetch, cobweb milkvetch |
freckled milkvetch, Mount Trumbull milkvetch |
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Habit | Plants perennial, 10–35 cm. | Plants perennial, 30–45(–65) cm, herbage green or subglabrescent. |
Stems | diffuse and incurved-ascending, often red-tinged. |
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Leaves | (2.5–)4–11 cm; leaflets (9 or)11–23, blades elliptic-oblanceolate, broadly oblong-oblanceolate, or obovate, (3–)5–17(–20) mm, apex obtuse or emarginate. |
2–9.5(–10.5) cm; leaflets (7–)13–17, blades broadly obovate to oblanceolate or elliptic, 5–15 mm, apex retuse to round or subacute, adaxial surface usually strigose to strigulose, sometimes glabrate or glabrous. |
Racemes | (5–)10–20-flowered, flowering from middle and distally, short and compact in fruit; axis (0.5–)1.5–4(–5.5) cm in fruit. |
loosely 4–15(–17)-flowered; axis elongating, 3–9.5 cm in fruit. |
Peduncles | (1–)2.5–6(–7.5) cm. |
4.5–7.5 cm. |
Flowers | (12.5–)15–18.2 mm; calyx (6.2–)7.5–10.5 mm, tube (4.6–)5.2–6.7 mm, lobes 1.4–3.8 mm; corolla bright pink-purple with pale, striate eye. |
13–17 mm; calyx 6.3–7.4 mm, tube 4.8–5.5 mm, lobes 1.7–2 mm; corolla pink- or red-purple, sometimes with pale or white wing tips. |
Legumes | green, often red-mottled, becoming stramineous, usually strongly incurved, ovoid, lanceoloid-ovoid, or ovoid-acuminate, moderately inflated, 15–30(–40) × (7–)9–15 mm, bilocular, stiffly papery or almost leathery, usually glabrous, rarely puberulent; beak well-defined, triangular or deltoid, 6–15 mm, unilocular. |
evidently persistent, stramineous or mottled, linear-oblong to oblong or narrowly ellipsoid, not or scarcely inflated, 17–32 × 4–5.5(–7.5) mm, ± bilocular, somewhat fleshy becoming leathery or stiffly papery, strigulose; beak 3–5 mm, unilocular; stipe 0.1–1 mm. |
Seeds | 24–34(–38). |
14–28. |
Astragalus lentiginosus var. chartaceus |
Astragalus lentiginosus var. trumbullensis |
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Phenology | Flowering May–Jul. | Flowering Apr (Sep). |
Habitat | Sagebrush, pinyon-juniper, and mixed desert shrub communities, on alluvial silt, igneous gravel. | Sandstone outcrops and gravel, with Agave, Ephedra, Mortonia, Purshia, and other warm-desert shrubs. |
Elevation | 1400–2200 m. (4600–7200 ft.) | 900–1800 m. (3000–5900 ft.) |
Distribution |
NV; UT |
AZ |
Discussion | Variety chartaceus is widespread from central to western Utah into northeastern and central Nevada, there intergrading with vars. fremontii, kennedyi, and toyabensis. S. L. Welsh (2007) discussed the problems of including this variety in an expanded var. diphysus and its complex relationships to other varieties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety trumbullensis is restricted to Mohave County. It is closely related to vars. mokiacensis and palans, weakly differentiated by a series of features that intergrade insensibly but taken in combination are more or less diagnostic (as is true for most members of the lentiginosus complex). J. A. Alexander (2005) provided statistical evidence that this variety is indistinguishable from var. mokiacensis (as Astragalus mokiacensis), and he considered the two synonymous. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. araneosus, A. lentiginosus var. araneosus | |
Name authority | M. E. Jones: Proc. Calif. Acad. Sci., ser. 2, 5: 673. (1895) | S. L. Welsh & N. D. Atwood: Rhodora 103: 81, fig. 3. (2001) |
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