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(Upload on August 10 2017) [ 日本語 | English ]

Isotoma axillaris Lindl.






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Isotoma Lindl. (ホシアザミ*)


10 species in Australia, New Zealand, Society Islands and West Indies
No native species to Japan
I. axillaris Lindl. (ホシアザミ)
Australia
I. petraea F. Muell. (イワホシアザミ*)

Isotoma axillaris in Hokkaido


I. axillaris Lindl.
Hoshi-azami (ホシアザミ*, 星薊), rock isotome or showy isotome

*: confusing (e.g., Hippobroma longiflora (L.) G. Don (syn. Laurentia longiflora (L.) Peterm.) also called as Hoshi-azami

Lifeform: short-lived perennial forb, treated as annual for gardening
Distribution: Australia (Queensland, New South Wales and Victoria)
Habitat: damp crevices on rocky cliffs, especially granite and sandstone, or shallow sandy soils
Use: gardening → cultivars, e.g., Alba, Blue Star, White, Avant-Garde Blue, Pink Star, Stargazer Mixed
Poison: severe irritation to skin and temporary blindness
Synonyms:

Laurentia axillaris (Lindl.) E. Wimmer, basionym

索引

ST1 ST2
ST3 ST4
[1-4] at a small garden (like a pot) adjacent to a bulding in N10/W3, North Ward, Sapporo, on July 7 2017.

Isotoma petraea F. Muell. in central Australia


Iwahoshi-azami (イワホシアザミ, 岩星薊), rock isotome (*: tentative translation)
Lifeform: perennial forb
Distribution: arid regions in central Australia
Habitat: breakways among rocky outcrops and in rock crevices
Flower: white - bule-purple
Use: gardening (cultivars, e.g., cv bullet blush)

ST1 ST2
[1/2] at the bottom of Uluru (Ayers Rock), central Australia, on July 17 2004.

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