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Perennial or annual herbaceous plants or low shrubs. Leaves imparipinnate, triple or rarely simple. Stipule free or fused. The blossoms gathered in heads. Calyx bell-shaped, more or less bilabial, with 5 dumb, equal in length teeth. Corolla yellow, yellow green, pink, white, lavender, blue or variegated. Flag rounded, wings ovoid or extended. The keel bent, sharpened. Stamens twins. Ovary with many ovules. Beans composed of individual members, in cross-section is rounded or four ridged, between segments is not strangulated. The seeds linearly extended to almost cylindrical, slightly flattened, with a spike in the middle of a narrow side. Pollinated by insects, propagated by seed.

Table for determining the species
1   Corolla yellow to yellow green ….................................................................................................................................................................... 2
1* Corolla with another color .............................................................................................................................................................................. 3
2   Lower leaves simple upper triple; Tip leaflet much longer than the side 5. Annual Scorpion Vetch, Yellow crownvetch - C. scorpioides (L.) Koch
2* All leaves imparipinnate, with more than 3 equal to each other notes ................................................................ 1. Scorpion Senna - C. emerus L.
3   Flowers 4.0 - 5.0 (7.0) mm long. Beans straight with curved beak .............................................................. 4. Cretan crownvetch - C. cretica L.
3*  Flowers (7.0) 8.0 - 15.0 mm in length. The bean more or less curved, straight beak …….......................................................................…..... 4
4   Calyx with clearly developed styliform triangular teeth. Corolla blue to blue and white .........2. Crownvetch[2] or purple crown vetch - C. varia L.
4* Calyx with imperceptible short triangular teeth. Corolla fully pale purple ......................……………………………3. x   x   x - C. elegans Panč.
¹ developed by St. Kozhuharov

„Флора на НР България”, том VI, БАН, София, (1976)

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The genus Coronilla contains about 20 species of flowering plants native to Europe and North Africa.[1]
Coronilla species are used as food plants by the larvae of some Lepidoptera species including the case-bearers Coleophora coronillae (which feeds exclusively on Coronilla varia) and Coleophora vicinella.
Species include:

• Coronilla glauca
• Coronilla iberica
• Coronilla minima
• Coronilla valentina (scorpion vetch)
• Coronilla varia L. (crown vetch)
• Securigera, a segregate genus of Coronilla

From Wikipedia, the free encyclopedia

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References: „Флора на НР България”, том VI, БАН, София, (1976), Wikipedia, the free encyclopedia

Distribution in Bulgaria: (Conspectus of the Bulgarian Vascular Flora) = conspectus&gs_l= Zlc.
Distribution:

SPECIES:

Coronilla scorpioides (L.) Koch - Annual scorpion vetch, Yellow crownvetch

Coronilla varia L. - Crownvetch or Purple crown vetch

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