Cynoglossum

Cynoglossum is a genus of small-flowered plants in the family Boraginaceae (borage family). It includes 81 species native to Eurasia, Africa, New Guinea, and Australia.

Cynoglossum officinale, the common hound's-tongue, is a native of Asia, Africa, and Europe. It has been introduced into North America, and it is considered to be a troublesome weed because its burs stick to the wool of sheep and to other animals. Ingestion of this plant can also lead to photosensitivity in grazing animals.

Species
, there are 81 accepted species in the genus:

• Cynoglossum aequinoctiale T.C.E.Fr.

• Cynoglossum alpestre Ohwi

• Cynoglossum alpinum (Brand) Riedl

• Cynoglossum alticola Hilliard & B.L.Burtt

• Cynoglossum amabile Stapf & J.R.Drumm. — Chinese hound's tongue

• Cynoglossum amplifolium Hochst. ex A.DC.

• Cynoglossum asperrimum Nakai

• Cynoglossum australe R.Br.

• Cynoglossum × austriacum Rech.

• Cynoglossum austroafricanum Hilliard & B.L.Burtt

• Cynoglossum baeticum Sutorý

• Cynoglossum barbaricinum Arrigoni & Selvi

• Cynoglossum birkinshawii J.S.Mill.

• Cynoglossum borbonicum (Lam.) Bory

• Cynoglossum bottae Deflers

• Cynoglossum brandii Sutorý

• Cynoglossum castaneum Riedl

• Cynoglossum celebicum Brand

• Cynoglossum cernuum Baker

• Cynoglossum cheirifolium L.

• Cynoglossum cheranganiense Verdc.

• Cynoglossum clandestinum Desf.

• Cynoglossum coeruleum Hochst. ex A.DC.

• Cynoglossum columnae Ten.

• Cynoglossum creticum Mill. — blue hound's tongue

• Cynoglossum dalianum Sutorý

• Cynoglossum densefoliatum Chiov.

• Cynoglossum dioscoridis Vill.

• Cynoglossum divaricatum Stephan ex Lehm.

• Cynoglossum formosanum Nakai

• Cynoglossum gansuense Y.L.Liu

• Cynoglossum germanicum Jacq. — green hound's tongue

• Cynoglossum glabellum Riedl

• Cynoglossum hanangense Verdc.

• Cynoglossum hellwigii Brand

• Cynoglossum hispidum Thunb.

• Cynoglossum holosericeum Steven

• Cynoglossum inyangense E.S.Martins

• Cynoglossum javanicum (Lehm.) A.DC.

• Cynoglossum kandavanense (Bornm. & Gauba) Akhani

• Cynoglossum karamojense Verdc.

• Cynoglossum krasniqii Wraber

• Cynoglossum lanceolatum Forssk.

• Cynoglossum × legionense Rothm.

• Cynoglossum lowryanum J.S.Mill.

• Cynoglossum macrocalycinum Riedl

• Cynoglossum macrolimbe Riedl

• Cynoglossum magellense Ten.

• Cynoglossum maghrebicum Sutorý

• Cynoglossum mathezii Greuter & Burdet

• Cynoglossum mediterraneum Sutorý

• Cynoglossum meeboldii Brand

• Cynoglossum microglochin Benth.

• Cynoglossum × modorense Rech.

• Cynoglossum monophlebium Baker

• Cynoglossum montanum L.

• Cynoglossum natolicum (Bornm.) Sutorý

• Cynoglossum nebrodense Guss.

• Cynoglossum nova-guineese Riedl

• Cynoglossum obtusicalyx Retief & A.E.van Wyk

• Cynoglossum officinale L. — common hound's tongue

• Cynoglossum papuanum Schltr. ex O.Brand

• Cynoglossum pitardianum Greuter & Burdet

• Cynoglossum pustulatum Boiss.

• Cynoglossum rochelia A.DC.

• Cynoglossum sabirense (R.R.Mill & A.G.Mill.) J.R.I.Wood

• Cynoglossum semnanicum Khat.

• Cynoglossum seravshanicum (B.Fedtsch.) Popov

• Cynoglossum spelaeum Hilliard & B.L.Burtt

• Cynoglossum sphacioticum Boiss. & Heldr.

• Cynoglossum stewartii Kazmi

• Cynoglossum timorense Riedl

• Cynoglossum torvum Dimon & M.A.M.Renner

• Cynoglossum trinervium (Duthie) Greuter & Stier

• Cynoglossum trollii Melch.

• Cynoglossum tsaratananense J.S.Mill.

• Cynoglossum tubiflorum (Murb.) Greuter & Burdet

• Cynoglossum ukaguruense Verdc.

• Cynoglossum vanense Sutorý

• Cynoglossum viridiflorum Pall. ex Lehm.

• Cynoglossum wallichii G.Don

• Cynoglossum watieri (Batt. & Maire) Braun-Blanq. & Maire

• Cynoglossum wildii E.S.Martins

• Cynoglossum yemenense (R.R.Mill & A.G.Mill.) Verdc.

• Cynoglossum zeylanicum (Sw. ex Lehm.) Thunb. ex Brand — Ceylon hound's tongue