Oxytropis campestris var. roaldii
Oxytropis campestris var. johannensis
roald's locoweed
johann's locoweed, oxytrope du fleuve saint-jean
2–11 cm;
stipules glabrous or strigose abaxially, margins ± ciliate, apex often bristly;
leaflets 11–21, scattered or opposite, blades 4–8.5 mm.
4–26 cm;
stipules glabrous or sparsely pilose abaxially, margins ciliate;
leaflets 15–29, opposite or subopposite, blades 3–29 mm.
usually 8–12(–14)-flowered, subcapitate or somewhat elongate.
7–12(–14)-flowered.
3–12 cm, axis 1.5–4.5 cm in fruit.
erect, (4–)8–36 cm, axis 1.5–9(–11) cm in fruit.
lavender or pink-purple, sometimes polychrome, 13–16(–17) mm.
usually purple, rarely white, 12–18.5 mm.
tube (3.7–)4.5–5 mm, lobes (1–)1.2–2(–2.7) mm.
tube 5–6 mm, lobes usually lanceolate, (1–)2–3 mm.
9–15 × 4–6 mm.
14–27 × 5–9 mm.
= 64.
= 48.
Oxytropis campestris var. roaldii
Oxytropis campestris var. johannensis
Variety roaldii has flowers that are usually larger, calyx lobes that are usually longer, and other subtle differences aside from flower color that allow segregation from var. jordalii. However, there are intermediate specimens, and in some places, especially on gravel bars, flower color grades within populations. A similar pattern is to be noted between the partially sympatric vars. davisii and spicata in the mountains of Alberta, and between other varieties situated elsewhere. The Pan-Arctic Flora (http://panarcticflora.org/) recognizes Oxytropis roaldii as a distinct species.
(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.)
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