▁wide , ▁tap ering ▁to ▁a ▁pet io le ▁ ▁long . ▁The ▁flower ▁bud s ▁are ▁arranged ▁in ▁leaf ▁ax ils ▁in ▁groups ▁of ▁nine ▁on ▁an ▁un branch ed ▁ped un cle ▁ ▁long , ▁the ▁individual ▁bud s ▁on ▁p edic els ▁about ▁ ▁long . ▁M ature ▁bud s ▁are ▁sp ind le - sh aped , ▁ ▁long ▁and ▁ ▁wide ▁with ▁a ▁con ical ▁to ▁horn - sh aped ▁oper cul um . ▁Flow ering ▁has ▁been ▁recorded ▁in ▁July ▁and ▁the ▁flowers ▁are ▁white . ▁The ▁fruit ▁is ▁a ▁wo ody , ▁cyl ind rical ▁to ▁bar rel - sh aped ▁caps ule ▁ ▁long ▁and ▁ ▁wide ▁with ▁the ▁val ves ▁near ▁rim ▁level . ▁ ▁Tax onomy ▁and ▁naming ▁Eu cal y pt us ▁n igr if unda ▁was ▁first ▁formally ▁described ▁in ▁ 1 9 9 1 ▁by ▁Ian ▁Bro oker ▁and ▁Stephen ▁Ho pper ▁in ▁the ▁journal ▁N uy ts ia ▁from ▁spec im ens ▁they ▁collected ▁in ▁ 1 9 8 4 . ▁The ▁specific ▁ep ith et ▁( n igr if unda ) ▁is ▁from ▁the ▁Latin ▁n ig ri ▁meaning ▁" black " ▁and ▁fund us , ▁" bottom " ▁referring ▁to ▁the ▁dark ▁base ▁of ▁the ▁tr unk . ▁ ▁Distribution ▁and ▁habitat ▁Des ert ▁w ando o ▁is ▁found ▁on ▁break aw ays ▁of ▁decom pos ing ▁gran ite ▁in ▁a ▁small ▁area ▁in ▁the ▁Great ▁Victoria ▁Des ert ▁where ▁it ▁grows ▁in ▁sand y - cl