CactiWikiBot: sample article

2026-07-11T16:15:47Z

sample article

← Older revision		Revision as of 16:15, 11 July 2026
Line 1:		Line 1:
	'''Astrophytum asterias''' is a ~~flat~~, spineless, disc-shaped ~~Mexican~~ cactus and the ~~parent of~~ most ~~modern Astrophytum cultivars~~. ~~This~~ is a ~~placeholder stub — the full article~~ is ~~generated by~~ the ~~content build~~.		{{Care
			\| light = Bright light; some shade from intense afternoon sun
			\| water = Sparingly; allow to dry fully between waterings, dry rest in winter
			\| soil = Fast-draining mineral mix (see [[Soil and potting mix]])
			\| temperature = Keep above freezing; USDA zones 9b–11
			\| toxicity = Non-toxic to cats and dogs
			\| propagation = Seed (primary); grafting to speed seedling growth
			}}
			'''''Astrophytum asterias''''' is a small, spineless, disc-shaped cactus from northeastern Mexico and southern Texas, and one of the most popular collector cacti in the world. Its flattened green body is divided into (usually) eight low ribs and dusted with tufts of white woolly scales, giving it a speckled, star-like appearance that has earned it common names such as '''sand dollar cactus''', '''sea urchin cactus''' and '''star cactus'''. It is the parent species behind most modern [[Astrophytum]] cultivars.

	[[Category:Astrophytum]] [[Category:Cactus]]		== Description ==
			''Astrophytum asterias'' forms a solitary, flattened globe 5–15 cm across and rarely more than a few centimetres tall. The body is firm and spineless, marked by broad, rounded ribs separated by shallow grooves. Along the centre of each rib sits a row of woolly areoles, and the whole surface is flecked with white trichomes whose density varies enormously between plants — a trait selectively bred to extremes in cultivation.

			Flowers emerge from the woolly crown in spring and summer: glossy yellow with a red-orange throat, 3–6 cm across, opening for a few days each. In habitat the plant contracts down into the soil during drought, leaving little more than the flat top visible among grass and leaf litter.

			== Distribution and habitat ==
			The species grows in Tamaulipan thornscrub and open grassland in the Mexican states of Tamaulipas and Nuevo León, and just across the border in the Rio Grande valley of southern Texas. Plants typically root in gritty or sandy soils among low shrubs and grasses that provide light shade.

			Wild populations have declined sharply from illegal collection and habitat loss. It is protected as an endangered species in the United States, and — like the whole cactus family — is listed under [[CITES]] Appendix II. Nursery-propagated plants, by contrast, are common, inexpensive and entirely legal to own and trade; collecting from the wild is not.

			== Cultivation ==
			''Astrophytum asterias'' is rewarding but unforgiving of overwatering, which is the most common cause of loss. Grow it in a very free-draining, mostly mineral [[Soil and potting mix\|mix]] in a snug pot, in bright light with a little protection from the fiercest afternoon sun. Water thoroughly when the soil has dried completely, then wait; keep the plant dry and cool through winter to encourage flowering and prevent rot.

			Because the species is naturally slow, many growers speed up young plants by [[Grafting\|grafting]] seedlings onto a vigorous rootstock, then growing them on their own roots later. See [[Watering]] and [[Repotting]] for general technique.

			== Propagation ==
			Seed is the standard method. The seeds germinate readily on a warm, mineral surface kept humid, and nearly all named cultivars are maintained and improved through seed selection rather than cuttings. The species seldom produces offsets, so vegetative propagation is uncommon outside of grafting. See [[Propagation — seed]] for a full walkthrough.

			== Cultivars ==
			''A. asterias'' has been bred more intensively than almost any other cactus, especially in Japan. Notable lines include '''Super Kabuto''' (dense, large, snow-white flecking), '''Onzuka''' (bright patterned flecking), '''nudum''' (a fleckless glossy-green form), '''Ooibo''' (enlarged areole wool) and countless hybrids with other ''Astrophytum'' species. See the [[Astrophytum]] genus page for an overview of the cultivar groups.

			== Common problems ==
			* '''Rot''' — almost always from overwatering or a slow-draining mix; the plant softens and browns from the base or crown.
			* '''Etiolation''' — insufficient light makes the body pale and dome upward, losing its flat symmetry.
			* '''Pests''' — red spider mites (fine webbing, bronzed skin) and mealybugs (white fluff in the areoles) are the usual culprits.

			== See also ==
			* [[Astrophytum]] — the genus overview
			* [[Grafting]] · [[Soil and potting mix]] · [[Watering]] · [[Propagation — seed]]

			== References ==
			<references />
			{{Care disclaimer}}

			[[Category:Astrophytum]]
			[[Category:Cactaceae]]
			[[Category:Cactus]]
			[[Category:Beginner friendly]]

CactiWikiBot: seed stub

2026-07-11T09:12:34Z

seed stub

New page

'''Astrophytum asterias''' is a flat, spineless, disc-shaped Mexican cactus and the parent of most modern Astrophytum cultivars. This is a placeholder stub — the full article is generated by the content build.

[[Category:Astrophytum]] [[Category:Cactus]]

Astrophytum asterias - Revision history

CactiWikiBot: sample article

CactiWikiBot: seed stub