Edit History
Dendrosenecio keniensis (Baker f.) Mabb. [family COMPOSITAE]
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, Part Part 3, page 547, (2005) Author: H. Beentje, C. Jeffrey & D.J.N. Hind
Names
Dendrosenecio keniensis (Baker f.) Mabb. [family COMPOSITAE], in Vuilleumier and Monasterio, High Altitude Tropical Biogeography: 100 (1986). Type: Kenya, Mt Kenya, Höhnel Valley, Gregory s.n. quoad inflorescentiam et flores (BM!, lecto., chosen by C. Jeffrey)
Senecio keniensis Baker f. [family COMPOSITAE], in J.B. 32: 140 (1894); U.K.W.F. ed. 2: 223 (1994)
Lobelia gregoriana [family CAMPANULACEAE], sensu Baker f. in J. B. 32: 66 (1894) pro parte, quoad folia
Senecio brassica R.E.Fr. & T.C.E.Fr. [family COMPOSITAE], in Svensk Bot. Tidskr 16: 336 (1922), nom. illegit. superfl.; A.V.P.: 226 (1957); K.T.S.: 159 (1961). Type as for S. keniensis Baker f.
Dendrosenecio brassica B. Nord. [family COMPOSITAE], in Opera Bot. 44: 43 (1978), nom. illegit.
Senecio keniensis subsp. keniensis [family COMPOSITAE], : C. Jeffrey in K.B. 41: 892 (1986); K.T.S.L.: 562 (1994), autonym
Information
Polycarpic plant to 1.5 m tall (in flower), initially upright, with trunk to 5 cm in diameter, pith to 2 cm in diameter; stem with densely packed leaf-rosettes of 30–40 leaves, with no internode elongation, cloaked with marcescent foliage. Lateral branches produced near ground-level readily capable of adventitious rooting to support a ‘creeping’ horizontal growth-form. Leaf lamina oblanceolate, to 56 cm long and 18 cm wide, basal portion wide, non-photosynthetic, and capable of secreting limited quantities of a mucilaginous fluid containing ice-nucleating polysaccharides, hair cushion present on upper leaf-base, which is also often coated with dried mucilage, lower surface with a dense, felty indumentum on the photosynthetic portion only. Inflorescence narrowly conical to 110 cm tall, 20 cm in diameter; capitula pendulous. Ray florets 12–16, to 25 mm long; disc florets 60–80.
Range
DISTR. K 4 endemic to Mt Kenya
Altitude range
3300–4275 m
Distribution
KENYA Mt Kenya, Jan. 1932, Rammell 2674! & Sirimon Track, Jan. 1963, Verdcourt 3539! & Lower Hinde Valley, ENE of Urumandi Hut, Jan. 1985, Townsend 2265!
Notes
USES. None recorded on specimens from our area CONSERVATION Protected in the National Park; least concern (LC) A mix-up with the Gregory material resulted in descriptions that united the leaf of Lobelia gregoriana with the inflorescence of this species and vice versa. Senecio keniensis was rejected as a nomen confusum, but this practice is no longer permitted by the Code and the replacement name, S. brassica, is now superfluous and other names based on this basionym are correspondingly illegitimate. Although Fries and Fries (1922) cited the Gregory material for S. brassica, Hedberg (1957) subsequently lectotypified this name with Fries & Fries 1305 (UPS!).
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, Part Part 3, page 547, (2005) Author: H. Beentje, C. Jeffrey & D.J.N. Hind
Names
Dendrosenecio keniensis (Baker f.) Mabb. [family COMPOSITAE], in Vuilleumier and Monasterio, High Altitude Tropical Biogeography: 100 (1986). Type: Kenya, Mt Kenya, Höhnel Valley, Gregory s.n. quoad inflorescentiam et flores (BM!, lecto., chosen by C. Jeffrey)
Senecio keniensis Baker f. [family COMPOSITAE], in J.B. 32: 140 (1894); U.K.W.F. ed. 2: 223 (1994)
Lobelia gregoriana [family CAMPANULACEAE], sensu Baker f. in J. B. 32: 66 (1894) pro parte, quoad folia
Senecio brassica R.E.Fr. & T.C.E.Fr. [family COMPOSITAE], in Svensk Bot. Tidskr 16: 336 (1922), nom. illegit. superfl.; A.V.P.: 226 (1957); K.T.S.: 159 (1961). Type as for S. keniensis Baker f.
Dendrosenecio brassica B. Nord. [family COMPOSITAE], in Opera Bot. 44: 43 (1978), nom. illegit.
Senecio keniensis subsp. keniensis [family COMPOSITAE], : C. Jeffrey in K.B. 41: 892 (1986); K.T.S.L.: 562 (1994), autonym
Information
Polycarpic plant to 1.5 m tall (in flower), initially upright, with trunk to 5 cm in diameter, pith to 2 cm in diameter; stem with densely packed leaf-rosettes of 30–40 leaves, with no internode elongation, cloaked with marcescent foliage. Lateral branches produced near ground-level readily capable of adventitious rooting to support a ‘creeping’ horizontal growth-form. Leaf lamina oblanceolate, to 56 cm long and 18 cm wide, basal portion wide, non-photosynthetic, and capable of secreting limited quantities of a mucilaginous fluid containing ice-nucleating polysaccharides, hair cushion present on upper leaf-base, which is also often coated with dried mucilage, lower surface with a dense, felty indumentum on the photosynthetic portion only. Inflorescence narrowly conical to 110 cm tall, 20 cm in diameter; capitula pendulous. Ray florets 12–16, to 25 mm long; disc florets 60–80.
Range
DISTR. K 4 endemic to Mt Kenya
Altitude range
3300–4275 m
Distribution
KENYA Mt Kenya, Jan. 1932, Rammell 2674! & Sirimon Track, Jan. 1963, Verdcourt 3539! & Lower Hinde Valley, ENE of Urumandi Hut, Jan. 1985, Townsend 2265!
Notes
USES. None recorded on specimens from our area CONSERVATION Protected in the National Park; least concern (LC) A mix-up with the Gregory material resulted in descriptions that united the leaf of Lobelia gregoriana with the inflorescence of this species and vice versa. Senecio keniensis was rejected as a nomen confusum, but this practice is no longer permitted by the Code and the replacement name, S. brassica, is now superfluous and other names based on this basionym are correspondingly illegitimate. Although Fries and Fries (1922) cited the Gregory material for S. brassica, Hedberg (1957) subsequently lectotypified this name with Fries & Fries 1305 (UPS!).
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, Part Part 3, page 547, (2005) Author: H. Beentje, C. Jeffrey & D.J.N. Hind
Names
Dendrosenecio keniensis (Baker f.) Mabb. [family COMPOSITAE], in Vuilleumier and Monasterio, High Altitude Tropical Biogeography: 100 (1986). Type: Kenya, Mt Kenya, Höhnel Valley, Gregory s.n. quoad inflorescentiam et flores (BM!, lecto., chosen by C. Jeffrey)
Senecio keniensis Baker f. [family COMPOSITAE], in J.B. 32: 140 (1894); U.K.W.F. ed. 2: 223 (1994)
Lobelia gregoriana [family CAMPANULACEAE], sensu Baker f. in J. B. 32: 66 (1894) pro parte, quoad folia
Senecio brassica R.E.Fr. & T.C.E.Fr. [family COMPOSITAE], in Svensk Bot. Tidskr 16: 336 (1922), nom. illegit. superfl.; A.V.P.: 226 (1957); K.T.S.: 159 (1961). Type as for S. keniensis Baker f.
Dendrosenecio brassica B. Nord. [family COMPOSITAE], in Opera Bot. 44: 43 (1978), nom. illegit.
Senecio keniensis subsp. keniensis [family COMPOSITAE], : C. Jeffrey in K.B. 41: 892 (1986); K.T.S.L.: 562 (1994), autonym
Information
Polycarpic plant to 1.5 m tall (in flower), initially upright, with trunk to 5 cm in diameter, pith to 2 cm in diameter; stem with densely packed leaf-rosettes of 30–40 leaves, with no internode elongation, cloaked with marcescent foliage. Lateral branches produced near ground-level readily capable of adventitious rooting to support a ‘creeping’ horizontal growth-form. Leaf lamina oblanceolate, to 56 cm long and 18 cm wide, basal portion wide, non-photosynthetic, and capable of secreting limited quantities of a mucilaginous fluid containing ice-nucleating polysaccharides, hair cushion present on upper leaf-base, which is also often coated with dried mucilage, lower surface with a dense, felty indumentum on the photosynthetic portion only. Inflorescence narrowly conical to 110 cm tall, 20 cm in diameter; capitula pendulous. Ray florets 12–16, to 25 mm long; disc florets 60–80.
Range
DISTR. K 4 endemic to Mt Kenya
Altitude range
3300–4275 m
Distribution
KENYA Mt Kenya, Jan. 1932, Rammell 2674! & Sirimon Track, Jan. 1963, Verdcourt 3539! & Lower Hinde Valley, ENE of Urumandi Hut, Jan. 1985, Townsend 2265!
Notes
USES. None recorded on specimens from our area CONSERVATION Protected in the National Park; least concern (LC) A mix-up with the Gregory material resulted in descriptions that united the leaf of Lobelia gregoriana with the inflorescence of this species and vice versa. Senecio keniensis was rejected as a nomen confusum, but this practice is no longer permitted by the Code and the replacement name, S. brassica, is now superfluous and other names based on this basionym are correspondingly illegitimate. Although Fries and Fries (1922) cited the Gregory material for S. brassica, Hedberg (1957) subsequently lectotypified this name with Fries & Fries 1305 (UPS!).
![Dendrosenecio keniensis (Baker f.) Mabb. [family COMPOSITAE]](/fsi/img/misc/plants/static_thumbs/flora_tropEA_icon96.jpg)
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