Othonna burttii B.Nord.

Species

Angiosperms > Asterales > Asteraceae > Othonna

Characteristics

A glabrous low shrub, repeatedly branching and forming mats. Stems short or elongated, up to ca. 20 cm long, soon becoming defoliated and clothed with remains of leaf-bases and sometimes also leaf remains, especially midribs. Leaves closely set, alternate, almost rosulate at branch ends, erecto-patent, entire, 2-8 cm long, 1-8 mm wide, flattened, linear-oblanceolate, somewhat leathery to subcarnose, faintly midveined, glaucous green, sometimes with a red line along leaf-margins, acute or subacute with an apiculate tip; leaf-base dilated, half-clasping. Peduncles terminal, solitary, erect, 8-22 cm long, 1-2 mm wide, striate, simple or sometimes with a lateral branch from a leaf axil below the middle, otherwise nude or with an occasional reduced bract. Capitulum radiate, with bright yellow florets. Involucre broadly campanulate, 1.2-1.5 cm in diam. Involucral bracts uniseriate, 8, narrowly oblong-ovate, 7-10 mm long, 2.5^1.0 mm wide, basally connate, coriaceous, 3-5-veined, acute. Receptacle somewhat convex especially when young, shallowly honey-combed, glabrous. Ray-florets 5-8, female, fertile. Tube 3.5-5.5 mm long, cylindrical or somewhat flattened, sometimes slightly tapering upwards. Lamina oblong, 10-14 mm long, 5-6 mm broad, 4-6-veined, minutely 3-4-fid at the rather truncate apex. Style terete or somewhat flattened, 2-veined; base somewhat swollen, on a short and indistinct stylopodium; branches linear-narrow-ly oblong, 1.0-1.5 mm long, with 2 discrete stigmatic lines and an obtuse or rounded glabrous tip. Achene oblong-obovate, often slightly curved and compressed, 5.5-6.5 mm long, 2.5-3.5 mm broad, with 12-15 close-lying low ribs (and achene wall with 12-15 corresponding veins), densely and shortly white-villous with duplex obtuse hairs, ca. 0.5 mm long, becoming mucilaginous when wet. Ovary wall crystals numerous, elongate, flattened, hexagonal in outline. Pappus bristles copious, pluriseriate, persistent, 4-7 mm long at anthesis, growing to 10-15 mm long in the fruiting stage, whitish or somewhat buff coloured, minutely barbellate. Disc-florets ca. 50-100. Corolla 4.5-5.5 mm long, glabrous; tube cylindrical, 1.5-2.0 mm long; limb narrowly campanulate, 3-4 mm long, 5-lobed; lobes deltoid-ovate, 0.7-1.0 mm long, with lateral veins and a distinct median resin duct. Anthers 1.7-2.5 mm long inch the ovate somewhat keeled apical appendage; anther base obtuse, ecaudate; endothecial tissue radial (i.e., with numerous longitudinal wall thickenings); filament collar somewhat swollen towards the base. Style sterile, terete, with swollen base on a distinct stylopodium, apically undivided and dilated to a conical papillate tip. Ovary terete, narrow, 2.5-4.5 mm long, 5-veined, glabrous. Pappus bristles subuniseriate, ca. 20-30, erect, 2.5-4.0 mm long, minutely barbellate.
More
Glabrous, glaucous, semi-fleshy, perennial herb, forming mats; stems branching, up to 200 mm long, soon defoliated, leaf bases persistent. Leaves at branch tips, linear-oblanceolate, flat, 20-80 mm long, base ± clasping. Capitula broadly campanulate, up to 40 mm in diam., rays (5-8) and disc yellow; peduncles (scapes) terminal, up to 220 mm long; involucral bracts oblong-ovate, acute, basally connate, 7-10 mm long. Flowering time Oct.-Feb. Pappus of whitish bristles, up to 15 mm long. Cypselae oblong-obovate, ribbed, white-villous, up to 6.5 mm long, mucilaginous when wet.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
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Environment

Light -
Soil humidity -
Soil texture 5-8
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Hardiness (USDA) 9-11

Usage

Uses -
Edible -
Therapeutic use -
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Cultivation

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Distribution

Othonna burttii world distribution map, present in Lesotho and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:896628-1
WFO ID wfo-0000008070
COL ID 75CPK
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Othonna burttii