Baccharoides
| 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
Baccharoides Moench, 1794 – Wikispecies link – Pensoft Profile
- Baccharoides Moench, Methodus 328 (1794). – Type: Conyza anthelmintica L.
- Ascaricida Cass., Dict. Sci. Nat. 3, suppl. 38 (1817), nom. superfl. – Type: Conyza anthelmintica L.
- Candidea Tenore, Atti Reale Accad. Sci. Sez. Soc. Reale Borbon 4 (CI. Botan.): 104, t. 1, 2 (1839). – Type: Candidea senegalensis Tenore.
- Vernonia subsect. Stengelia Sch. Bip. ex Walp., Repert. Bot. Syst. 2: 946 (1843). – Type: Vernonia adoensis Sch. Bip. ex Walp.
- Stengelia Steetz in Peters, Reise Mossamb., Bot. 360. 1864. – Type: Vernonia schimperi DC.
- Vernonia sect. Stengelia (Sch. Bip. ex Walp.) Benth. in Benth. & Hook.f., Gen. Pl. 2: 127 (1873).
Resources
Treatment by Isawumi et al. (1996)[1].
Descriptions
Annual or perennial herbs, suffruticose; stems erect or reclining; hairs short-stalked with an erect, elongate apical cell. Leaves alternate, narrowly petiolate; blades chartaceous, ovate to elliptic, serrate, secondary veins pinnate, ascending at 45° angles or more. Inflorescence with single lateral or terminal head or heads in corymbiform groups; peduncles usually solid, sometimes fistulose. Heads with involucres broadly campanulate or hemispherical; bracts 25–100 in 4–8 series, mostly gradate but with outer bracts sometimes elongate and foliiform, tips of bracts appendaged, white or colored; receptacles epaleate. Florets 25–100 in a head; corollas reddish or lavender to white, with long slender basal tube, limb abruptly expanded at base, cylindrical, with lobes about as long as throat, erect, with various hairs and glands outside, inside with cells elongate, transversely striate; anther thecae spurred with small tails; endothecial cells with nodular thickenings on tranverse walls; apical appendages oblong-ovate, rounded or acute at tips, glabrous; nectary elongate, cylindrical; style base without node; sweeping hairs acicular. Achenes cylindrical or turbinate, 8–20-costate, glabrous or with setulae distinctly cleft or with glands or idioblasts, carpopodium annuliform, large to obsolete, with thickened porose walls, raphids in ovules elongate, with rhomboid tips; pappus pluriseriate, persistent or caducous, inner capillary, flattened, barbellate on margins, sometimes shortly connate at base, sometimes with outer row of small scales. Chromosome number x = 10 (Jones 1970[2], Mathew and Mathew 1983[3])
Pollen. 43.5–72.0 μm diam. (Isawumi et al. 1996[1]); tricolporate, echinolophate; lacunae regularly disposed, one at each pole, 2 across intercolpus; tectum restricted to muri, with distinct microperforations; stout baculae under muri firmly attached to footlayer (Fig. 3A–I). Most notable secondary metabolites, sesquiterpene elemanolides (Bohlmann and Jakupovic 1990[4], as Vernonia anthelmintica (L.) Willd., Vernonia hymenolepis A. Rich., Vernonia lasiopus O. Hoffm.), eudesmanolide (Bohlmann and Jakupovi 1990[4], as Vernonia adoensis Sch. Bip. ex Walp.).
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
|
![Figure 3. Scanning electron electron micrographs from three collections of acetolyzed echinolophate Baccharoides pollen showing variations in spine shape from acute to markedly blunt. A–H. Baccharoides anthelmintica (L.) Moench. A polar view B Equatorial view C Lateral view D Near polar view E Equatorial view F Fractured grain G Lateral view H Equatorial view I Fractured grain. (A–C, USDA P.I. 283729; D–F, Cooray 70031701R; G–I, Koelz 7469). [Views from Robinson and Skvarla (2010); Figure 1 B = original Figure 1G; Figure 1C = original Figure 1H; and Figure 1H = original Figure 1J.]](/wiki/File:Phytokeys-60-e6734-g003.jpg)
Other References
- ↑ 1.0 1.1 Isawumi M, El-Ghazaly G, Nordenstam B (1996) Pollen morphology, floral microcharacters and taxonomy of the genus Baccharoides Moench (Vernonieae: Asteraceae). Grana 35: 205–230. doi: 10.1080/00173139609430008
- ↑ Jones S (1970) Chromosome numbers in Compositae. Bulletin of the Torrey Botanical Club 97(3): 168–171. doi: 10.2307/2483355
- ↑ Mathew P, Mathew A (1983) Studies on south Indian Compositae. V. Cytotaxonomic consideration of the tribes Vernonieae and Eupatoriae. Cytologia 48: 679–690. https://www.jstage.jst.go.jp/browse/cytologia/41/0/_contents
- ↑ 4.0 4.1 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
