What's the difference between arrowwood and viburnum?

Arrowwood

Definition:

(n.) A shrub (Viburnum dentatum) growing in damp woods and thickets; -- so called from the long, straight, slender shoots.

Example Sentences:

Definition:

(n.) A genus of shrubs having opposite, petiolate leaves and cymose flowers, several species of which are cultivated as ornamental, as the laurestine and the guelder-rose.

Example Sentences:

(1) Gel diffusion patterns indicated, however, that the A- and B-like activities of the Viburnum fruits were somewhat distinct serologically from blood group A and B substances of human origin.
(2) Amentoflavone hexaacetate (AmAc) was synthesized from natural amentoflavone (Am), a biflavonoid extracted from Viburnum lantana L. Am does not inhibit aggregation of intact platelets up to a concentration of 100 microM but inhibits human platelet cAMP phosphodiesterase (IC50 = 22.0 microM).
(3) Well I have no idea what shale actually is, kind of like kale, I think, but sweeter, like those new sprouts, I mean I did try asking Dave, which is literally torture now he just says long-term plan whatever you ask him, as in I'll go babes, what is shale, he'll be like, the next phase of our long-term plan, I'll go, are we watching Sherlock?, he's like, I'm sticking to our long-term plan, I'm like *snaps fingers* wake UP, what is your NAME, he's like *zombie voice* a key part of my long-term plan, seriously, I said to Mummy, I always KNEW hypnosis was a bad idea & I would tell Mr Cobber to turn it off except he has still not finished digging this latrine behind the viburnum?
(4) The majority of species exhibiting a high grade of such cross-reactivity belonged to two genera, Viburnum of the Caprifoliaceae and Acer of the Aceraceae.