Oxytropis campestris var. johannensis
Oxytropis campestris var. roaldii
johann's locoweed, oxytrope du fleuve saint-jean
roald's locoweed
4–26 cm;
stipules glabrous or sparsely pilose abaxially, margins ciliate;
leaflets 15–29, opposite or subopposite, blades 3–29 mm.
2–11 cm;
stipules glabrous or strigose abaxially, margins ± ciliate, apex often bristly;
leaflets 11–21, scattered or opposite, blades 4–8.5 mm.
7–12(–14)-flowered.
usually 8–12(–14)-flowered, subcapitate or somewhat elongate.
erect, (4–)8–36 cm, axis 1.5–9(–11) cm in fruit.
3–12 cm, axis 1.5–4.5 cm in fruit.
usually purple, rarely white, 12–18.5 mm.
lavender or pink-purple, sometimes polychrome, 13–16(–17) mm.
tube 5–6 mm, lobes usually lanceolate, (1–)2–3 mm.
tube (3.7–)4.5–5 mm, lobes (1–)1.2–2(–2.7) mm.
14–27 × 5–9 mm.
9–15 × 4–6 mm.
= 48.
= 64.
Oxytropis campestris var. johannensis
Oxytropis campestris var. roaldii
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.)
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.)
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