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sweetclover, volga sweet-clover

common melilot, field or rib or yellow melilot, rib melilot, sweetclover, yellow melilot, yellow sweet-clover

Habit Herbs biennial, 40–120(–150) cm. Herbs usually biennial, sometimes annual, (15–)30–280 cm.
Stems

erect.

decumbent to erect.

Leaves

stipules linear-setaceous or subulate, 6–8(–10) mm, margins entire;

leaflet blades rhombic-ovate to oblong-lanceolate, or linear, 10–30 × 2–8 mm, margins dentate or entire.

stipules lanceolate or subulate, 3–6(–12) mm, margins entire;

leaflet blades obovate, obovate-oblong, ovate, or ovate-lanceolate, 8–25 × 4–15 mm, margins dentate.

Racemes

25–60-flowered.

30–70(–80)–flowered.

Pedicels

2–4 mm.

(1.5–)2–2.5 mm.

Flowers

3–3.5 mm;

corolla white;

ovary glabrous.

4–7 mm;

corolla yellow;

ovary glabrous.

Legumes

obovoid, 4–5 mm, distinctly reticulate-veined, glabrous.

ovoid, 2.5–5 mm, transversely rugose, areoles notably elongated, glabrous.

Seeds

usually 1 (or 2), oblong-ovoid, 2.5 mm.

1 (or 2), ovoid, obovoid, or ellipsoid, (1.5–)1.8–2(–2.5) mm.

2n

= 16 [Eurasia].

= 16.

Melilotus wolgicus

Melilotus officinalis

Phenology Flowering spring–summer. Flowering spring–fall.
Habitat Gravel pits, wasteland, drainage ditches, sandy banks. Grasslands, slopes, plains, hillsides, waste places, roadsides, cultivated fields.
Elevation 200–500 m. (700–1600 ft.) 0–3100 m. (0–10200 ft.)
Distribution
from FNA
MB; SK; Eurasia [Introduced in North America]
[BONAP county map]
from FNA
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; ON; PE; QC; SK; YT; Eurasia [Introduced in North America; introduced also in Mexico, South America, Africa, Australia]
[WildflowerSearch map]
[BONAP county map]
Discussion

The Manitoba vouchers of Melilotus wolgicus are mostly G. A. Stevenson collections at DAO from the Brandon area and are almost certainly established escapes from the extensive experimental cultivation of Melilotus species by Stevenson; it has also been observed persisting in the forage plot area of the Research Station, Saskatoon, Saskatchewan, but does not appear to have spread elsewhere.

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

Melilotus officinalis is occasionally grown as a forage crop, but it is generally considered to be an undesirable weed.

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

Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Melilotus Fabaceae > subfam. Faboideae > Melilotus
Sibling taxa
M. albus, M. altissimus, M. indicus, M. officinalis, M. sulcatus
M. albus, M. altissimus, M. indicus, M. sulcatus, M. wolgicus
Synonyms Trifolium officinale, Trigonella officinalis
Name authority Poiret in J. Lamarck et al.: Encycl., suppl. 3: 648. (1814) — (as wolgica) (Linnaeus) Lamarck: Fl. Franç. 2: 594. (1779)
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