Edit History
Helichrysum ruderale [family ASTERACEAE]
Date Updated: 19 August 2007
Herbarium
South African National Biodiversity Institute, Compton Herbarium, Cape Town (SAM)
Collection
Flora of Southern Africa
Resource Type
Reference Sources
Entry From
Flora of South Africa, (2003) Author: Dr J.P. Roux
Names
Helichrysum ruderale [family ASTERACEAE]
Information
Biennial herb, aromatic when fresh, up to c. 1 m tall, stem stout, base up to 10 mm diam., simple below the inflorescence, glandular-setose, the uppermost part and the inflorescence branches thinly white-woolly as well, leafy throughout. Radical leaves wanting at flowering; cauline leaves up to 180 x 65 mm, decreasing in size upwards, elliptic or lanceolate-elliptic, upÂpermost lanceolate, apex acute to acumiÂnate, apiculate, base broad, cordate-clasping, all but the uppermost decurrent in long or short wings, both surfaces glandular-setose, margins often white-woolly as well. Heads heterogamous, depressed-globose, c. (22—) 25—32 mm across the radiating bracts, many in a large corymbose panicle, the branches obliquely ascending. Involucral bracts in c. 9 series, graded, imbricate, much exceeding flowers, radiating, glossy, bright yellow. Receptacle honeycombed. Flowers 811-1053, 121-226 ("female"), 681—754 ("bisexual"), yellow. Achenes c. 1 mm long, barrel-shaped, glabrous. Pappus bristÂles many, equalling corolla, tips barbellate, bases with patent cilia, cohering or not.
Habitat
Closely allied to H. cooperi (below) and not easy to distinguish in the herbarium. The persistent white wool on the inflorescence branches to well below the first forking is a useful character to distinguish H. ruderale; white wool is usually wanting in H. cooperi except sometimes immediately below the heads. H. ruderale flowers in spring, H. cooperi in summer. In the field, the obliquely-ascending inflorescence branches of H. ruderale immediately distinguish it from H. cooperi with inflorescence branches wide-spreading to nearly horizontal.
Use
239. Helichrysum ruderale Hilliard & Burtt in Notes R. bot. Gdn Edinb. 34: 82 (1975); Hilliard, Compositae in Natal 244 (1977). Type: Natal, Pinetown distr., Ever-ton, Eskotene, c. 600 m, Hilliard & Burtt 7216 (NU, holo.!; E; K; PRE, iso.!).
Range
Recorded only from Natal, from Eshowe, Mtunzi-ni and Umvoti districts in the north to Port Shepstone district in the south, from near sea level to c. 1 050 m. A weed, often forming dense stands along roadsides and in old fields; flowering in September and October, fading in November. Map 233.
Date Updated: 19 August 2007
Herbarium
South African National Biodiversity Institute, Compton Herbarium, Cape Town (SAM)
Collection
Flora of Southern Africa
Resource Type
Reference Sources
Entry From
Flora of South Africa, (2003) Author: Dr J.P. Roux
Names
Helichrysum ruderale [family ASTERACEAE]
Information
Biennial herb, aromatic when fresh, up to c. 1 m tall, stem stout, base up to 10 mm diam., simple below the inflorescence, glandular-setose, the uppermost part and the inflorescence branches thinly white-woolly as well, leafy throughout. Radical leaves wanting at flowering; cauline leaves up to 180 x 65 mm, decreasing in size upwards, elliptic or lanceolate-elliptic, upÂpermost lanceolate, apex acute to acumiÂnate, apiculate, base broad, cordate-clasping, all but the uppermost decurrent in long or short wings, both surfaces glandular-setose, margins often white-woolly as well. Heads heterogamous, depressed-globose, c. (22—) 25—32 mm across the radiating bracts, many in a large corymbose panicle, the branches obliquely ascending. Involucral bracts in c. 9 series, graded, imbricate, much exceeding flowers, radiating, glossy, bright yellow. Receptacle honeycombed. Flowers 811-1053, 121-226 ("female"), 681—754 ("bisexual"), yellow. Achenes c. 1 mm long, barrel-shaped, glabrous. Pappus bristÂles many, equalling corolla, tips barbellate, bases with patent cilia, cohering or not.
Habitat
Closely allied to H. cooperi (below) and not easy to distinguish in the herbarium. The persistent white wool on the inflorescence branches to well below the first forking is a useful character to distinguish H. ruderale; white wool is usually wanting in H. cooperi except sometimes immediately below the heads. H. ruderale flowers in spring, H. cooperi in summer. In the field, the obliquely-ascending inflorescence branches of H. ruderale immediately distinguish it from H. cooperi with inflorescence branches wide-spreading to nearly horizontal.
Use
239. Helichrysum ruderale Hilliard & Burtt in Notes R. bot. Gdn Edinb. 34: 82 (1975); Hilliard, Compositae in Natal 244 (1977). Type: Natal, Pinetown distr., Ever-ton, Eskotene, c. 600 m, Hilliard & Burtt 7216 (NU, holo.!; E; K; PRE, iso.!).
Range
Recorded only from Natal, from Eshowe, Mtunzi-ni and Umvoti districts in the north to Port Shepstone district in the south, from near sea level to c. 1 050 m. A weed, often forming dense stands along roadsides and in old fields; flowering in September and October, fading in November. Map 233.
![Helichrysum ruderale [family ASTERACEAE]](/fsi/img/misc/plants/static_thumbs/cover_florasa_icon96.jpg)
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