Flora of North America species comparison

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Astragalus lentiginosus var. oropedii
Photo is of parent taxon

freckled milkvetch, Kaibab Plateau milkvetch
Habit Plants perennial, (10–)20–80 cm.
Stems

decumbent or weakly ascending, flexuous or zigzag in age, glabrous or glabrate.
Leaves

5–15 cm;

leaflets 15–21(–25), blades broadly oblong-elliptic, ovate-oblong, or suborbiculate, 5–20(–25) mm, apex rounded, truncate, or retuse.
Racemes

shortly (8–)10–25-flowered, compact in fruit;

axis little elongating, 1.5–4(–5) cm in fruit.
Peduncles

(2–)3–10 cm.
Flowers

(12.5–)13.2–20 mm;

calyx 7.5–10.8 mm, tube (4.5–)5–7.5 mm, lobes (2.5–)3–5 mm;

corolla purple or pale pink-purple.
Legumes

mottled, obliquely ovoid or semi-ovoid, ± strongly inflated, 13–25(–30) × 6.5–14 mm, ± bilocular, stiffly papery, glabrous;

beak 5–8 mm, unilocular.
Seeds

20–33.

Astragalus lentiginosus var. oropedii
Phenology Flowering Jun–Sep.
Habitat Openings in ponderosa pine for­ests.
Elevation 2100–2500 m. (6900–8200 ft.)
Distribution
from FNA
AZ
[BONAP county map]
Discussion

Variety oropedii is locally common but apparently confined to the Kaibab Plateau, especially the North Rim and upper levels of the northern wall of the Grand Canyon in Coconino County. Specimens with thin-textured, subdiaphanous fruits that occur within or near known localities of var. oropedii have been tentatively placed with var. vitreus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Diphysi > Astragalus lentiginosus
Sibling taxa
A. lentiginosus var. albifolius, A. lentiginosus var. ambiguus, A. lentiginosus var. antonius, A. lentiginosus var. australis, A. lentiginosus var. chartaceus, A. lentiginosus var. coachellae, A. lentiginosus var. coulteri, A. lentiginosus var. diphysus, A. lentiginosus var. floribundus, A. lentiginosus var. fremontii, A. lentiginosus var. higginsii, A. lentiginosus var. idriensis, A. lentiginosus var. ineptus, A. lentiginosus var. kennedyi, A. lentiginosus var. kernensis, A. lentiginosus var. latus, A. lentiginosus var. lentiginosus, A. lentiginosus var. macrolobus, A. lentiginosus var. maricopae, A. lentiginosus var. micans, A. lentiginosus var. mokiacensis, A. lentiginosus var. multiracemosus, A. lentiginosus var. negundo, A. lentiginosus var. nigricalycis, A. lentiginosus var. palans, A. lentiginosus var. piscinensis, A. lentiginosus var. platyphyllidius, A. lentiginosus var. pohlii, A. lentiginosus var. salinus, A. lentiginosus var. scorpionis, A. lentiginosus var. semotus, A. lentiginosus var. sesquimetralis, A. lentiginosus var. sierrae, A. lentiginosus var. stramineus, A. lentiginosus var. toyabensis, A. lentiginosus var. trumbullensis, A. lentiginosus var. variabilis, A. lentiginosus var. vitreus, A. lentiginosus var. wahweapensis, A. lentiginosus var. wilsonii, A. lentiginosus var. yuccanus
Name authority Barneby: Leafl. W. Bot. 4: 135. (1945)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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