Pseudelephantopus spicatus
| 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{Bunwong2014PhytoKeys37, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Bunwong2014PhytoKeys37">{{Citation See also the citation download page at the journal. |
Ordo: Asterales
Familia: Asteraceae
Genus: Pseudelephantopus
Name
Pseudelephantopus spicatus (Juss. ex Aubl.) C.F. Baker, Trans. Acad. Sci. St. Louis 12: 45, 55 & 56. 1902. – Wikispecies link – IPNI link – Pensoft Profile
- Pseudelephantopus spicatus (Juss. ex Aubl.) Rohr, Skrifl. Nat. Selsk. Kiobenh. 2: 216. 1792.
- Elephantopus spicatus Juss. ex Aublet, Hist. Pl. Guiane 2: 808. 1775.
Type
not ascertained. Figs 8E–F.
Description
Perennial herbs, 10–40 cm tall. Stems erect, inconspicuously ribbed, puberulous. Leaves simple, rosulate or alternate at base, 5–15 by 1.5–5 cm, obovate or oblanceolate, margin slightly serrate to entire, apex obtuse or rounded, base cuneate or attenuate, subcoriaceous; upper surface puberulous without glands, lower surface puberulous with filiform hairs and capitate glands; lateral veins 9–15-paired; petioles up to 2 cm long. Capitulescences terminal and axillary, capitula 1-4 aggregated in clusters supported by foliaceous bracts, clusters arranged in a spike. Capitula tubular, 14–17 mm long. Receptacle flat, 1–1.5 mm in diam., glabrous. Florets bisexual and fertile. Involucres oblong, in 2 series, 10–11 mm long. Phyllaries 8, decussate, light green, margin entire or piliferous, outer surface pilose without glands; the outer lanceolate, apicies acute; the inner ones obovate-lanceolate or oblong, apices acute. Florets 4; corollas salverform, white, zygomorphic, glabrous; corolla tubes 5–9 mm long; corolla lobes 2.5–2.8 mm long. Anthers 1.5–2 mm long, apical appendage acute, base acute. Styles white, 5–9 mm long, branches ca. 2 mm long, inner surface covered with stigmatic papillae. Achenes clavate, 4–5 mm long, pubescent with densely twin hairs, without glands, 10-ribbed. Pappus in 1 series, often of 2 sizes and bent at the tip, bristles 6–9, 2–6 mm long.
Distribution
Thailand: Chiang Rai, Nakhon Phanom, Ubon Ratchathani. Tropics.
Specimens examined
Thailand, Ubon Ratchathani, Chong Mek border crossing, 15°8.02'N, 105°28.01'E, 27 Oct 2007, S. Bunwong 342 (KKU); Chiang Rai, Muang District, 20 Nov 2007, S. Bunwong 352 (KKU, US); Nakhon Phanom, Ban Phang, 24 Feb 2003, Th. Wongprasert et al. 032-17 (BKF).
Diagnostic characters
Pseudelephantopus spicatus is distinguished from Elephantopus by having spicate capitulescences and contorted pappus.
Ecology
Open areas in dipterocarp forest or river bank, alt. 100–400 m; flowering October to December.
Vernacular name
Doo La Doo (โด่ลาโด่), Ton Tai Din (ต้นใต้ดิน).
Taxon Treatment
- Bunwong, S; Chantaranothai, P; Keeley, S; 2014: Revisions and key to the Vernonieae (Compositae) of Thailand PhytoKeys, 37: 25-101. doi
Images
|
