The scientific name is Acer negundo. I found this on http://www.wildflower.org/plants/result.php?id_plant=ACNE2
The scientific name of the hawthorn tree is Crataegus monogyna.
fraxinus americana
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The Emerald Ash Borer is a predator to ash trees. It infests and feeds on ash trees, causing severe damage and often leading to tree death. The invasive beetle is a significant threat to ash tree populations in North America.
There is no scientific name per se for a rice hull.However, according to Wikipedia:"To protect the seed during the growing season, the hull is made of hard materials, including opaline silica and lignin.... The very high content in amorphous silica of the hulls confer to them and to their ash (SiO2 ~ 20 wt.%) after combustion very valuable properties."
The scientific name of the Koala is Phascolarctos cinereus. It is a marsupial mammal and is indigenous to Australia. There is only one species.The Phascolarctos is derived from the Greek words phaskolos, meaning "pouch" and arktos, meaning "bear", even though the animal is not even remotely related to bears.Cinereus is a Latin word that means "ash coloured". Koalas have light to dark grey fur with brown and white patches and a cream belly.Scientific name for a kola bear?Phascolarctos cinereus
Well a phoenix is a mythical creature, so there is no real answer. This was the best I could do. The Haast eagle was the largest eagle we know of, it is now extinct. The largest living eagle is the Harpy Eagle, from the Harpia genus, which as far as i can tell is the same genus as the Haast (the Haast eagle's scientific name is Harpagornis moorei). So, if the phoenix did exist, my guess would be due to it's size, it would be a bird of prey from the Harpia genus. I have two names:The first is;Harprognatus exornus, which means, "Harpy born from ash"The second is;Harprognatus exincendia, which means, "Harpy born from fire"The first name is more accurate, due to a phoenix is reborn from it's own ashes, although I do like the second one's sound better. Take it or leave it, its all mythology!
Fraxinus ornus
The Mountain Ash is Sorbus aucuparia. I know of no tree called the Rocky Mountain Ash.
Fraxinus americana.
The name would be Fraxinus excelsior.
Sorbus americana
The name would be Fraxinus americana.
Fraxinus excelsior (European) Family: Oleaceae.
Rowan or Sorbus aucuparia.
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The accepted scientific name is Podosesia syringae.
The accepted scientific name is Manduca jasminearum.
Fraxinus quadrangulata