Bothriocline
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{Robinson2016PhytoKeys, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Robinson2016PhytoKeys">{{Citation See also the citation download page at the journal. |
Ordo: Asterales
Familia: Asteraceae
Name
Bothriocline Oliv. ex Benth. – Wikispecies link – Pensoft Profile
- Bothriocline Hooker’s Icon. Pl. 12: 30, t. 1133. 1873. – Type: Bothriocline schimperi Oliv. & Hiern ex Benth.
- Volkensia O. Hoffm., Bot. Jahrb. Syst. 20: 219. 1894; Engl. & Prantl, Natürl. Pflanzenfam. iv. 5: 387. 1893. – Type: Volkensia argentea O. Hoffm.
Resources
Many species are keyed in Jeffrey’s (1988)[1] treatment of Vernonieae in East Africa and in Wild and Pope (1977)[2], Wild (1978a[3], 1978b[4]).
Descriptions
Perennial herbs (up to 1 m) to subshrubs, branching sparse, stems erect with a solid pith and long-armed T-shaped hairs with short 2-celled stalks. Leaves alternate, opposite or whorled, sessile to short petiolate, blade narrow to ovate or elliptical, pinnately veined, often paler or tomentose to sericeous below. Inflorescence laxly to densely corymbiform or thyrsiform cymes; heads pedunculate. Involucres campanulate, bracts ca. 50–60, gradate in 3–4 series, cuspidate at apex, with distinct pale or reddish lateral margins, nearly glabrous to pilosulous outside; receptacle convex, epaleaceous, with glabrous reticulum. Florets 3–100 or more in a head; corollas purplish, funnelform, basal tube slender with small stipitate glands, throat shorter than 1 mm, lobes, linear-lanceolate, with glandular dots and often with stiff subapical hairs; anther thecae blunt at base with few sterile cells; apical appendages ovate-oblong, with thin cell walls; style base with minimal annuliform node; sweeping hairs acicular, mostly restricted to branches. Achenes prismatic, short and broad with 3–6(–9) ribs, setuliferous with sparse short setulae scarcely split at tips, often densely covered with idioblasts and with scattered subquadrate raphids. Pappus of few or no short easily deciduous bristles narrowed at base, without obvious shorter ourter series or outer pappus a rim or collar. Chromosome number n = 9, 10, 18–20 (Jones 1979[5], 1982[6]). Pollen grains ca. 47 μm in diam, lophate to rarely sublophate, finely echinate, pores in triplet of connected colpar lacunae, perforated tectum usually restricted to muri (Fig. 4 A–C). Notable secondary metabolites include 5-alkylcoumarins and sesquiterpene glaucolides/hirsutanolides [Bohlmann and Jakupovic 1990[7], as Bothriocline laxa N.E. Br., Bothriocline longipes (Oliv. & Hiern) N.E. Br.], and Volkesia ripensis Hutch. and 5-alkylcoumarins (Bohlmann and Jakupovic 1990[7], as Erlangea fusca S. Moore, Erlangea rogersii S. Moore).
Taxon Treatment
- Robinson, H; Skvarla, J; Funk, V; 2016: Vernonieae (Asteraceae) of southern Africa: A generic disposition of the species and a study of their pollen PhytoKeys, (60): 49-126. doi
Images
|
Other References
- ↑ Jeffrey C (1988) The Vernonieae in East Tropical Africa. Notes on Compositae: V. Kew Bulletin 43(2): 195–277. doi: 10.2307/4113734
- ↑ Wild H, Pope G (1977) The compositae of the Flora Zambesiaca area. Vernonieae (excluding Vernonia Schreb.). Kirkia 10: 339–384.
- ↑ Wild H (1978a) New and interesting Vernonia species from the Flora Zambesiaca area. Kirkia 11: 1–23.
- ↑ Wild H (1978b) The Compositae of the flora Zambesiaca area – Vernonieae (Vernonia). Kirkia 11: 31–127.
- ↑ Jones S (1979) Chromosomes of the Vernonieae (Compositae). Bulletin of the Torrey Botanical Club 106: 79–84. doi: 10.2307/2484281
- ↑ Jones S (1982) Pp. 126–127 In: Löve A (Ed.) IOPB Chromosome number reports LXXIV. Taxon 31: 119–128. http://www.jstor.org/stable/1219710?seq=1#page_scan_tab_contents
- ↑ 7.0 7.1 Bohlmann F, Jakupovic J (1990) Progress in the chemistry of the Vernonieae (Compositae). Plant Systematics and Evolution Suppl. 4: 3–43. doi: 10.1007/978-3-7091-6928-5_2
