- Family: Asteraceae Bercht. & J.Presl
Dendrosenecio (Hauman ex Hedberg) B.Nord.
This genus is accepted, and is native to Africa..
Descriptions
According to Flora of Tropical East Africa
[FTEA]Compositae, H. Beentje, C. Jeffrey & D.J.N. Hind. Flora of Tropical East Africa. 2005
- Habit
- Perennial giant-rosette plants to 10 m tall with woody trunks; typically upright and polycarpic, with branching initiated below each terminal inflorescence, sometimes monocarpic or creeping; primary stem 2–12 cm wide, comprised mainly of pith, which provides internal water capacitance; secondary growth produces abundant white wood and a grey, furrowed bark
- Seeds
- Seedlings and young plants with leaves commonly constricted toward the base, forming a pseudo-petiole, particularly when growing in partial shade
- Leaves
- Developing leaves of mature plants revolutely folded, the upper lamina glabrescent; commonly bathed in mucilage, an ice-nucleating pectinaceous material that in some species is secreted among the leaf bases and may collect in the leaf-rosette Leaves alternate (although appearing whorled in densely packed leaf-rosettes), to 120 cm long and 35 cm wide, simple, in rosettes of 10–100, with developing leaves often reaching almost mature length in a massive ‘apical bud’ before unfurling to join the leaf-rosette; leaf base wide, sheathing, often with a dense cushion of white trichomes on the upper surface; leaf margin occasionally entire, but usually serrate or dentate, tipped with hydathodes; indumentum of lower lamina comprising multicellular, uniseriate trichomes, variable among species, but generally villose along the lower midvein
- Inflorescences
- Inflorescence to 2.5 m tall, erect, pyramidal-paniculate or cylindrical, densely pubescent to glabrescent; bracteate, with a range of transitional shapes from the mature vegetative leaves subtending the peduncle to the small bracts subtending each capitulum; capitula numerous, with biseriate involucral bracts; outer bracts 5–23, filiform, 5–18 mm long; inner bracts 10–25, narrow to broadly ovate, 11–16 x 2–6 mm, with apical papillae; receptacle nude
- Ray
- Ray florets absent or 6–20, yellow, female, with staminodes sometimes present, ray 2–23 x 2–5 mm; tube 4–8 mm long
- Florets
- Disc florets 30–380, yellow, hermaphrodite, 8–10 mm long; style with a continuous stigmatic surface; anthers non-auriculate, filament collars balusteriform Ray florets absent or 6–20, yellow, female, with staminodes sometimes present, ray 2–23 x 2–5 mm; tube 4–8 mm long
- Disc
- Disc florets 30–380, yellow, hermaphrodite, 8–10 mm long; style with a continuous stigmatic surface; anthers non-auriculate, filament collars balusteriform
- Fruits
- Achenes glabrous, 8–10-ribbed; pappus of many bristles.
Images
Distribution
Accepted Species
- Dendrosenecio adnivalis (Stapf) E.B.Knox
- Dendrosenecio battiscombei (R.E.Fr. & T.C.E.Fr.) E.B.Knox
- Dendrosenecio brassica (R.E.Fr. & T.C.E.Fr.) B.Nord.
- Dendrosenecio brassiciformis (R.E.Fr. & T.C.E.Fr.) Mabb.
- Dendrosenecio cheranganiensis (Cotton & Blakelock) E.B.Knox
- Dendrosenecio elgonensis (T.C.E.Fr.) E.B.Knox
- Dendrosenecio erici-rosenii (R.E.Fr. & T.C.E.Fr.) E.B.Knox
- Dendrosenecio johnstonii (H.H.Johnst.) B.Nord.
- Dendrosenecio keniensis (Baker f.) Mabb.
- Dendrosenecio keniodendron (R.E.Fr. & T.C.E.Fr.) B.Nord.
- Dendrosenecio kilimanjari (Mildbr.) E.B.Knox
- Dendrosenecio meruensis (Cotton & Blakelock) E.B.Knox
Other Data
Dendrosenecio (Hauman ex Hedberg) B.Nord. appears in other Kew resources:
Bibliography
First published in Opera Bot. 44: 40 (1978)
Accepted by
- Roskov Y. & al. (eds.) (2018). Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.
Literature
Flora of Tropical East Africa
- E. B. Knox in Contr. Univ. Michigan Herb. 19: 243 (1993)
- C. Jeffrey in K.B. 41: 887 (1986)
- B. Nord. in Opera Bot. 44: 40 (1978)
- Mabb. in K.B. 28: 80 (1973)
- A.V.P.: 226 (1957)
- in Rev. Zool. Bot. Afr. 28: 31 (1935)
Sources
Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0
Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0
Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0