What's the difference between alkanet and bugloss?

Alkanet

Definition:

(n.) A dyeing matter extracted from the roots of Alkanna tinctoria, which gives a fine deep red color.
(n.) A boraginaceous herb (Alkanna tinctoria) yielding the dye; orchanet.
(n.) The similar plant Anchusa officinalis; bugloss; also, the American puccoon.

Example Sentences:

(1) These techniques will detect the presence of coal tar dyes, imidazole, histamine, histidine, cochineal, beet powder, annatto, alkanet, carotene, paprika, saffron, turmeric, and materials causing discoloration in meats.

Definition:

(n.) A plant of the genus Anchusa, and especially the A. officinalis, sometimes called alkanet; oxtongue.

Example Sentences:

(1) Notton discovered the country’s second small-headed resin bee and another newcomer, viper’s bugloss mason bee , at Greenwich peninsula ecology park in London , a brownfield site converted into a nature reserve.
(2) Email From: Viper Bugloss The officials should step in and stop the contest to prevent the Raiders from receiving any more punishment.
(3) Only manuka and vipers bugloss (Echium vulgare L. Family: Boraginaceae) honeys showed this type of activity in a significant proportion of the samples.