Guizotia jacksonii is a low, creeping, perennial plant with ovate leaves and yellow flowerheads belonging to the family Asteraceae. This species is endemic to Kenya, and grows in along roads and other open treaded places in the forest zones the central highlands of Kenya.[2]
In 1902, Spencer Le Marchant Moore was the first to describe this species of sunfleck as Coreopsis jacksonii, based on a specimen collected by Frederick John Jackson from the Kiambu County in Kenya in 1899. John Hutchinson assigned a plant collected by Battiscombe from the Aberdare Range in Nyandarua County to the genus Guizotia and called it G. reptans. Earl Edward Sherff described in 1923 a plant from the western slopes of Mount Kenya, found by Mearns, as Bidens spathulata. By 1926 he had realised it was identical to Moore's species, but as he thought it better placed in Bidens, he made the new combination B. jacksonii. Robert Elias Fries collected a slightly different specimen in 1928 that he called Guizotia reptans var. keniensis, while Sherff also had a plant he regarded as sufficiently divergent and called it Coreopsis jacksonii var. arthrochaeta in 1929. It wasn't until 1974 that J. Baagøe synonymised all of these names, and had to create the new combination Guizotia jacksonii to satisfy the International Code of Nomenclature for algae, fungi, and plants.[3]
Descriptionedit
Guizotia jacksonii is a low (about 1 cm high) perennial, herbaceous, creeping plant, which branches sparingly, each hairless stem 3–30 cm long, that makes roots at the nodes and sometimes forms clumps. The leaves are set opposite along the stem and may be unequal to each other, lacking a leaf stalk, oval in shape 1–6¼ cm long and ½–2½ cm wide, merged at the narrowed foot with the opposing leaf. The edge of the leaf has distanced and very small teeth ending in a gland, and are often rolled back. There may be some hairs on the leaf or only on the veins. The flowerheads sit individually in the axil of the leaves near the tip and stand on a stalk of ½–3 cm long. The involucre is ¾–1¼ cm long, the individual bract with a row of hairs along the rim. The scales (or paleas) set on the common base of the florets (called receptacle) at the foot of each floret are yellowish and up to 3 mm long. Each flowerhead has four to nine yellow ray florets on the outside with a tube of 2 mm long, and a strap of ¾–1½ cm long, tipped with three teeth. In the middle are seven to thirteen disc florets, each 3¾–5 mm long. The ripe indehiscent and one-seeded fruits (called cypselas) are brown in color and 3½ mm long. There is no hairy or scaly pappus present.[3] The species has thirty chromosomes (2n=30).[4]
^"Guizotia jacksonii (S.Moore) Baagøe". The Plantlist. Retrieved 2017-03-08.
^Getinet, A.; Sharma, S.M. (1996), Niger. Guizotia abyssinica (L. f.) Cass.(PDF), Promoting the conservation and use of underutilized and neglected crops, vol. 5, Gatersleben/Rome: Institute of Plant Genetics and Crop Plant Research/International Plant Genetic Resources Institute
^ abcBeentje, H.; Jeffrey, C.; Hind, D.J.N. (2005). Flora of Tropical East Africa. Vol. Part 3. p. 547. cited on "Compilation Guizotia reptans". GSTORE Global Plants. Retrieved 2017-03-08.
^Mbuni, Yuvenalis Morara; Zhou, Yadong; Wang, Shengwei; Ngumbau, Veronicah Mutele; Musili, Paul Mutuku; Mutie, Fredrick Munyao; Njoroge, Brian; Kirika, Paul Muigai; Mwachala, Geoffrey; Vivian, Kathambi; Rono, Peninah Cheptoo; Hu, Guangwan; Wang, Qingfeng (18 April 2019). "An annotated checklist of vascular plants of Cherangani hills, Western Kenya". PhytoKeys. 120: 1–90.
Media related to Guizotia jacksonii at Wikimedia Commons
January 01, 1970
guizotia, jacksonii, creeping, perennial, plant, with, ovate, leaves, yellow, flowerheads, belonging, family, asteraceae, this, species, endemic, kenya, grows, along, roads, other, open, treaded, places, forest, zones, central, highlands, kenya, scientific, cl. Guizotia jacksonii is a low creeping perennial plant with ovate leaves and yellow flowerheads belonging to the family Asteraceae This species is endemic to Kenya and grows in along roads and other open treaded places in the forest zones the central highlands of Kenya 2 Guizotia jacksonii Scientific classification Kingdom Plantae Clade Tracheophytes Clade Angiosperms Clade Eudicots Clade Asterids Order Asterales Family Asteraceae Genus Guizotia Species G jacksonii Binomial name Guizotia jacksonii S Moore J Baagoe 1 Synonyms Coreopsis jacksonii Bidens jacksonii Coreopsis jacksonii var arthrochaeta Guizotia reptans Guizotia reptans var keniensis Bidens spathulata Contents 1 Taxonomy 2 Description 3 Distribution 4 ReferencesTaxonomy editIn 1902 Spencer Le Marchant Moore was the first to describe this species of sunfleck as Coreopsis jacksonii based on a specimen collected by Frederick John Jackson from the Kiambu County in Kenya in 1899 John Hutchinson assigned a plant collected by Battiscombe from the Aberdare Range in Nyandarua County to the genus Guizotia and called it G reptans Earl Edward Sherff described in 1923 a plant from the western slopes of Mount Kenya found by Mearns as Bidens spathulata By 1926 he had realised it was identical to Moore s species but as he thought it better placed in Bidens he made the new combination B jacksonii Robert Elias Fries collected a slightly different specimen in 1928 that he called Guizotia reptans var keniensis while Sherff also had a plant he regarded as sufficiently divergent and called it Coreopsis jacksonii var arthrochaeta in 1929 It wasn t until 1974 that J Baagoe synonymised all of these names and had to create the new combination Guizotia jacksonii to satisfy the International Code of Nomenclature for algae fungi and plants 3 Description editGuizotia jacksonii is a low about 1 cm high perennial herbaceous creeping plant which branches sparingly each hairless stem 3 30 cm long that makes roots at the nodes and sometimes forms clumps The leaves are set opposite along the stem and may be unequal to each other lacking a leaf stalk oval in shape 1 6 cm long and 2 cm wide merged at the narrowed foot with the opposing leaf The edge of the leaf has distanced and very small teeth ending in a gland and are often rolled back There may be some hairs on the leaf or only on the veins The flowerheads sit individually in the axil of the leaves near the tip and stand on a stalk of 3 cm long The involucre is 1 cm long the individual bract with a row of hairs along the rim The scales or paleas set on the common base of the florets called receptacle at the foot of each floret are yellowish and up to 3 mm long Each flowerhead has four to nine yellow ray florets on the outside with a tube of 2 mm long and a strap of 1 cm long tipped with three teeth In the middle are seven to thirteen disc florets each 3 5 mm long The ripe indehiscent and one seeded fruits called cypselas are brown in color and 3 mm long There is no hairy or scaly pappus present 3 The species has thirty chromosomes 2n 30 4 Distribution editGuizotia jacksonii is an endemic of Mount Elgon Cherangani Hills Forest 5 the Aberdare Range Mau Forest and Mount Kenya where it occurs between 2350 3900 m altitude 3 References edit Guizotia jacksonii S Moore Baagoe The Plantlist Retrieved 2017 03 08 Getinet A Sharma S M 1996 Niger Guizotia abyssinica L f Cass PDF Promoting the conservation and use of underutilized and neglected crops vol 5 Gatersleben Rome Institute of Plant Genetics and Crop Plant Research International Plant Genetic Resources Institute a b c Beentje H Jeffrey C Hind D J N 2005 Flora of Tropical East Africa Vol Part 3 p 547 cited on Compilation Guizotia reptans GSTORE Global Plants Retrieved 2017 03 08 Hiremath S C Murthy H N 1992 Cytogenetical studies in Guizotia Asteraceae Caryologia 45 1 69 82 doi 10 1080 00087114 1992 10797212 Mbuni Yuvenalis Morara Zhou Yadong Wang Shengwei Ngumbau Veronicah Mutele Musili Paul Mutuku Mutie Fredrick Munyao Njoroge Brian Kirika Paul Muigai Mwachala Geoffrey Vivian Kathambi Rono Peninah Cheptoo Hu Guangwan Wang Qingfeng 18 April 2019 An annotated checklist of vascular plants of Cherangani hills Western Kenya PhytoKeys 120 1 90 nbsp Media related to Guizotia jacksonii at Wikimedia Commons Retrieved from https en wikipedia org w index php title Guizotia jacksonii amp oldid 1216308097, wikipedia, wiki, book, books, library,
