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  4. Crassula multicava subsp. multicava

Crassula multicava subsp. multicava

Papa Aroha, November.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Papa Aroha, November.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Pest plant

NPPA pest plant

Environmental Weed

Environmental Weed (2024)

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Common names

fairy crassula

Biostatus

Exotic

Category

Vascular

Structural class

Herbs - Dicotyledons other than Composites

Flower colours

Red/Pink

Detailed description

Glabrous perennial herb; stems prostrate, creeping, sprawling or decumbent, rooting at nodes. Leaves shortly petiolate, sometimes with petioles to 2 cm long, mostly on distal ascending part of stems, not decussate or imbricate except in small rosettes at stem apices, to 45-(55) x 40-(43)mm, broadly ovate, broadly oblong-elliptic, to suborbicular or almost square, flat, entire, green or glaucescent, often suffused with red, especially towards margins, dotted with numerous whitish or reddish hydathodes; base rounded , truncate or subcordate; apex rounded or more or less emarginate. Inflorescence a loose thyrse, to about 10 cm long but very variable in size; main axis with very small bracts. Flowers 5-merous, 8-12 mm diameter, usually 12-numerous, on pedicels slightly < to = flowers. Calyx 1.5-2 mm long; lobes triangular. Carolla star-like, petals free and patent, (4)-5-6 x 1-2 mm, narrowly triangular or triangular-lanceolate, rose to crimson in bud, pale pink inside at anthesis; apex acute. Stamens 3-4 mm long, < carpels. Scales 0.2-0.3 mm long, more or less rectangular (wider than long). Fruits and seeds not seen, but flowers often replaced by small plantlets in inflorescence branch axils. (Webb et al 1988).

Habitat

Terrestrial.

Conservation status

Not applicable

Detailed taxonomy

Genus

Crassula

Family

Crassulaceae

Authority

Crassula multicava Lem. subsp. multicava

Endemic genus

No

Endemic family

No

Ecology

Flowering

August, September, October, November, December, January, February

Year naturalised

1959

Origin

South Africa

Reason for introduction

Ornamerntal.

Life cycle and dispersal

Perennial. Spreads vegetatively to form dense cover. Plantlets on flowerheads drop off and develop. Seed not observed in NZ.

Other information

Etymology

crassula: From the Latin crassus ‘thick’, meaning ‘rather thick’

National Pest Plant Accord species

This plant is listed in the 2020 National Pest Plant Accord. The National Pest Plant Accord (NPPA) is an agreement to prevent the sale and/or distribution of specified pest plants where either formal or casual horticultural trade is the most significant way of spreading the plant in New Zealand. For up to date information and an electronic copy of the 2020 Pest Plant Accord manual (including plant information and images) visit the MPI website.

Environmental Weed (2024)

This plant is named in a list of 386 environmental weeds in New Zealand 2024 prepared by DOC. 759 candidate species were considered for inclusion on this new comprehensive list of environmental weeds in New Zealand. The species considered were drawn from published lists of weed species, lists of plants that must be reported or managed by law if observed, existing national and regional programmes and agreements for pest management, and species already managed by the Department of Conservation (DOC). Candidate species were then assessed to see if they were fully naturalised and whether they have more than minor impacts in natural ecosystems. Read the full report here.

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