Dendrosenecio adnivalis
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Dendrosenecio adnivalis (synonym Senecio adnivalis) is one of the giant groundsels of the mountains of Eastern Africa. D. adnivalis grows on the Rwenzori Mountains[1] and on the Virunga Mountains[2] in Uganda and the Democratic Republic of Congo.
Description
Dendrosenecio adnivalis attains heights of Script error: No such module "convert". tall, trunk can be 40 centimeters diameter and the pith Script error: No such module "convert". diameter.[1][3] The stems have 25 to 60 leaves densely packed in a rosette shape at the top. Old leaves are persistent,[1] withered leaf-bases covering the stalk for 1 to 3 meters below the leaf-rosettes. Leaf surfaces are elliptic to heart shaped and can be Script error: No such module "convert". long and Script error: No such module "convert". wide, hairy on the top and not hairy on the bottom. Branched clusters of flowers to Script error: No such module "convert". tall and Script error: No such module "convert". wide. The droopy flower heads have 9 to 20 ray florets, 16 millimeters long or no ray florets at all and 90 to 250 disc florets.[3]
Distribution
The Congo Basin is very wet; humid air is trapped by the mountains and rain falls on most days even in the drier months. Above Script error: No such module "convert". clouds can persist for several days making the Rwenzori and the Virunga a wetter environment than the other East African mountains.[4] Dendrosenecio adnivalis lives at altitudes of Script error: No such module "convert". on the Rwenzori Mountains with another giant groundsel, Dendrosenecio johnstonii. D. adnivalis more common on the wetter soils.[1]
On the Virunga Mountains groves of Senecio stanleyi (Dendrosenecio adnivalis) grow after the tree heaths (Erica sp.) in clearings along with Lobelia wollastonii until the altitude of Script error: No such module "convert". when vegetation becomes sparse.[5]
Synonyms
The herbarium has all of the Dendrosenecio adnivalis specimens filed under Senecio johnstonii[6] and indeed, one is probably a variety or subspecies of the other that adapted to live closer to water and on damper ground.[7][8]
A synonym for Senecio stanleyi is Dendrosenecio adnivalis (Stapf) E.B.Knox var. petiolatus (Hedberg) E.B.Knox; for this article, Senecio stanleyi was considered to be a synonym of Dendrosenecio adnivalis.[9]
References
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External links
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- Dendrosenecio
- Endemic flora of Kenya
- Rwenzori Mountains
- Virunga Mountains
- Afromontane flora