Flora of North America species comparison

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Lotus krylovii

krylov's bird's-foot trefoil, krylov's trefoil
Habit Herbs perennial [annual], 10–45 cm, glabrous (except glabrate on leaves and calyx); taprooted.
Stems

erect or decumbent, solid, not succulent.
Leaves

8–16 mm;

rachis 1.5–5 mm;

leaflet blades: basal 2 obliquely ovate, terminal 3 obovate to obovate-elliptic or obovate-lanceolate, 5–15 × 1–4 mm, length 3.2–5 times width, apex rounded to ± acute.
Inflorescences

1(or 2[–4]-flowered;

bracts 1–3-foliolate.
Peduncles

ascending, 1–4.5(–6) cm.
Flowers

7–9.2[–10] mm;

calyx 4–6 mm, lobes erect in bud, triangular to deltate-acuminate, (1.5–)2–2.8[–3.5] mm, ± equaling tube, tube glabrate;

petals light yellow, ± pink-tinged abaxially, turning pinkish or red, 6.6–8.5 mm, wings equaling keel.
Legumes

brown, cylindric, 15–25[–35] × 2–3 mm, not septate.
Seeds

6–10[–30], brown, finely mottled, globose, 0.8–1.4 mm, smooth.
2n

= 12.

Lotus krylovii
Phenology Flowering summer.
Habitat Alkaline meadows, saline lake shores, dry hillsides.
Elevation 500–600 m. (1600–2000 ft.)
Distribution
from FNA
BC; e Europe (Russia, Ukraine); c Asia; w Asia [Introduced in North America]
[BONAP county map]
Discussion

Lotus krylovii is known in the flora area only from the the Okanagan Valley of British Columbia, near White Lake. I. I. Zandstra and W. F. Grant (1968) reported it in their study of Lotus in Canada, and it is still extant there.

S. I. Ali (1977) synonymized this species with an expanded Lotus corniculatus var. tenuifolius Linnaeus (synonym of L. tenuis), but the taxa are distinct in morphology, distribution, and ecology.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Lotus
Sibling taxa
L. angustissimus, L. corniculatus, L. subbiflorus, L. tenuis, L. uliginosus
Synonyms L. corniculatus var. versicolor
Name authority Schischkin & Sergievskaja: Sist. Zametki Mater. Gerb. Tomsk. 1932(7–8): 5. (1932)
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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