Flora of North America species comparison

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Oxytropis campestris var. wanapum

Oxytropis campestris var. johannensis
Photo is of parent taxon

field locoweed, Wanapum crazyweed, Wanapum locoweed
Photo is of parent taxon

johann's locoweed, oxytrope du fleuve saint-jean
Habit Plants (10–)13–21 cm, herbage silky-pilose, canescent. Plants 4–86 cm, herbage silky-pilose, hairs subappressed, often becoming green and glabrate.
Leaves

(11–)14–18(–22) cm;

stipules pilose abaxially, margins ciliate;

leaflets (13–)19–25(–33), scattered or subopposite, blades linear to narrowly oblong, (8–)15–25(–33) mm.

4–26 cm;

stipules glabrous or sparsely pilose abaxially, margins ciliate;

leaflets 15–29, opposite or subopposite, blades 3–29 mm.
Racemes

(5 or)6–12-flowered.

7–12(–14)-flowered.
Peduncles

(10–)17–21(–30) cm, axis (4–)6–8(–12) cm in fruit.

erect, (4–)8–36 cm, axis 1.5–9(–11) cm in fruit.
Corollas

pale lavender, banner veined, keel tip maculate with purplish blue, 14–20(–23) mm.

usually purple, rarely white, 12–18.5 mm.
Calyces

tube 5–7 mm, lobes (1–)2–3 mm.

tube 5–6 mm, lobes usually lanceolate, (1–)2–3 mm.
Legumes

13–23 × 3.5–5 mm.

14–27 × 5–9 mm.
2n

= 48.

Oxytropis campestris var. wanapum

Oxytropis campestris var. johannensis
Phenology Flowering spring. Flowering summer.
Habitat Gravelly ridges above steep north-facing basalt talus. Rock outcrops, islands, gravel bars.
Elevation 600 m. (2000 ft.) 10–400 m. (0–1300 ft.)
Distribution
from FNA
WA
[BONAP county map]
from FNA
ME; NB; NF; NS; ON; QC
[BONAP county map]
Discussion

Variety wanapum is restricted to xeric, basaltic gravels, talus, or outcrops in Grant County. Its flowers, suffused with purple, are diagnostic since no other varieties of the species in the Pacific Northwest typically have colored flowers. The narrow-bladed leaflets tend to be involute and to vary in number, usually 19–25. These vegetative features are unlike any of the other several varieties of Oxytropis campestris that occur elsewhere in North America and have lavender to purplish flowers.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Plants of var. johannensis from south of James Bay, Ontario, have fasciculate leaves and relatively short fruits; the latter characteristic indicates a close relationship to var. chartacea. Some specimens appear to be transitional to Oxytropis splendens. The Pan-Arctic Flora (http://panarcticflora.org/) treats var. johannensis as a synonym of O. terrae-novae.

Variety johannensis is in the Center for Plant Conservation’s National Collection of Endangered Plants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Oxytropis > Oxytropis campestris Fabaceae > subfam. Faboideae > Oxytropis > Oxytropis campestris
Sibling taxa
O. campestris var. chartacea, O. campestris var. columbiana, O. campestris var. cusickii, O. campestris var. davisii, O. campestris var. dispar, O. campestris var. johannensis, O. campestris var. jordalii, O. campestris var. minor, O. campestris var. roaldii, O. campestris var. spicata, O. campestris var. varians
O. campestris var. chartacea, O. campestris var. columbiana, O. campestris var. cusickii, O. campestris var. davisii, O. campestris var. dispar, O. campestris var. jordalii, O. campestris var. minor, O. campestris var. roaldii, O. campestris var. spicata, O. campestris var. varians, O. campestris var. wanapum
Synonyms Aragallus campestris var. johannensis, A. johannensis, Astragalus campestris var. johannensis, O. campestris subsp. johannensis, O. johannensis
Name authority Joyal: Great Basin Naturalist 50: 373, fig. 1. (1991) Fernald: Rhodora 1: 88. (1899)
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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