Dendrosenecio erici-rosenii one of the East Africa

East Africa

East Africa or Eastern Africa is the easterly region of the African continent, variably defined by geography or geopolitics. In the UN scheme of geographic regions, 19 territories constitute Eastern Africa:...

n giant groundsel and this one can be found on the Ruwenzori Mountains, Virunga Mountains

Virunga Mountains

The Virunga Mountains are a chain of volcanoes in East Africa, along the northern border of Rwanda, the Democratic Republic of the Congo and Uganda. The mountain range is a branch of the Albertine Rift, a part of the Great Rift Valley. They are located between Lake Edward and Lake Kivu...

 and the Mitumba Mountains

Mitumba Mountains

The Mitumba Mountain range stretches along the Western Rift Valley in Burundi and Eastern Congo , west of lake Tanganyika. The two main peaks, Mount Kahuzi and Mount Biéga are extinct volcanoes.-References:...

. A species of the genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Dendrosenecio

Dendrosenecio

Dendrosenecio is a genus of flowering plants belonging to the family Asteraceae. It is a segregate of Senecio, in which it formed the subgenus Dendrosenecio...

and is also a collection of reclassified Senecio

Senecio

Senecio is a genus of the daisy family that includes ragworts and groundsels. The flower heads are normally rayed, completely yellow, and the heads are borne in branched clusters...

species.

Description

Dendrosenecio erici-rosenii grows to 6 meters tall. The old leaves drop off and leave a very slender stem. Flower heads have very prominent yellow

Yellow

Yellow is the color evoked by light that stimulates both the L and M cone cells of the retina about equally, with no significant stimulation of the S cone cells. Light with a wavelength of 570–590 nm is yellow, as is light with a suitable mixture of red and green...

 ray flowers.

Distribution

Dendrosenecio erici-rosenii is found more on sloping, better-drained soils on the Ruwenzori Range

Ruwenzori Range

The Rwenzori Mountains, previously called the Ruwenzori Range , and sometimes the Mountains of the Moon, is a mountain range of central Africa, often referred to as Mt...

, Virunga Mountains

Virunga Mountains

The Virunga Mountains are a chain of volcanoes in East Africa, along the northern border of Rwanda, the Democratic Republic of the Congo and Uganda. The mountain range is a branch of the Albertine Rift, a part of the Great Rift Valley. They are located between Lake Edward and Lake Kivu...

 and the Mitumba Mountains

Mitumba Mountains

The Mitumba Mountain range stretches along the Western Rift Valley in Burundi and Eastern Congo , west of lake Tanganyika. The two main peaks, Mount Kahuzi and Mount Biéga are extinct volcanoes.-References:...

 between 3,500 and 4,500 meters. Also found between 4,400 to 5,000 meters but it does not produce flowers there.

Infraspecific name synonymy

The names for the giant groundsels have become somewhat confusing:

• Dendrosenecio erici-rosenii (R.E.Fr. & T.C.E.Fr.) E.B.Knox
  • Dendrosenecio erici-rosenii (R.E.Fr. & T.C.E.Fr.) E.B.Knox subsp. alticola (Mildbr.) E.B.Knox
    • Senecio adnivalis Stapf var. alticola (T.C.E.Fr.) Hedberg
    • Senecio adnivalis Stapf var. intermedia Hauman
    • Senecio alticola T.C.E.Fr. var. subcalvescens Hauman
    • Senecio johnstonii Oliv. var. alticola (T.C.E.Fr.) C.Jeffrey
    • Senecio refractisquamatus De Wild. var. intermedia (Hauman) Robyns
  • Dendrosenecio erici-rosenii (R.E.Fr. & T.C.E.Fr.) E.B.Knox subsp. erici-rosenii
    • Senecio erici-rosenii R.E.Fr. & T.C.E.Fr.
    • Senecio johnstonii Oliv. var. erici-rosenii (R.E.Fr. & T.C.E.Fr.) C.Jeffrey
    • Senecio kahuzicus Humb.
    • Senecio longeligulatus De Wild.