Ancistrocactus scheeri (Salm-Dyck) Britton & Rose

국표에 없다.

Origin and Habitat: USA (Texas); Mexico (Coahuila, Nuevo León, Tamaulipas).
Altitude: 20-1600 metres over sea level.
Habitat and Ecology: Sclerocactus scheeri grows under drip line of brush in Tamaulipan thorn scrub community, on grassy plains and open low hills or brushy areas in grasslands, on sandy, loamy, silty, or gravelly soils. It is scattered and not very abundant. There are no known major threats to this species. The same area support endemic succulents and xerophyte plants such as Mammillaria centralifera, Mammillaria plumosa, Astrophytum asterias, Echinocereus blanckii, Echinocereus stramineus, Thelocactus bicolor, Thelocactus saussieri, Echinocactus platyacanthus, Echinocactus horizonthalonius, Ferocactus stainesii, Agave striata, Coryphantha roederiana, Opuntia bulbispina, Opuntia cholla, Euphorbia antisyphilitica, Agave lechuguilla... and many other.

Common Names include:
ENGLISH: Fishhook Cactus, Twisted Ribs Cactus, Scheer's Fish-hook Cactus, Tobusch Fishhook Cactus, Root cactus
SPANISH (Español): Biznaga-bola Ganchuda

Description: Sclerocactus scheeri best known as Ancistrocactus scheeri is a small fish-hook cactus with a large fleshy turnip root, neck-shaped grown together with the stem. The spines varies from yellow to brown and often prevent the flowers from opening fully. Flowering in early spring; flowers pale-green or yellow-green.
Habit: Solitary (unless injured) until very old age, or with few branches from ground level when old. Seedlings and immature plants often have narrowly cylindrical stems. With age, the stems broaden distally.
Stem: Cylindrical to club-shaped, or spheric, up to 17cm tall, 5-8 cm in diameter.
Spines: Radial spines 13-28 per areole, translucent yellowish, tips red-brown, longest spines 6 to 28 mm long; central spines 3-4 per areole; abaxial central spine tan to whitish 1 per areole, hooked terete or slightly flattened, generally whitish or light brown, 12-38 mm long; adaxial central spines (2-)3 per areole, brown to dark reddish brown, erect, straight, 19-50 mm long. Juvenile spines are all radials numerous, short, tightly appressed and pectinate.
Roots: Long, fleshy, tuberlike taproots, sometimes having bulbous secondary roots horizontally oriented, sausage-shaped or otherwise strongly tuberlike, but always separated from the stem by a fragile constriction, in contrast to the short, succulent, vertical taproots of Ancistrocactus brevihamatus.
Flowers: Bright green to yellowish (rarely pink to pale reddish) with a brown midline. Flowering in February-March.
Remarks: Ancistrocactus scheeri is relatively similar above ground to the related species Ancistrocactus brevihamatus, but the roots of Ancistrocactus scheeri are frequently horizontally oriented, strongly tuberlike and always separated from the stem by a fragile constriction, in contrast to the short, succulent, vertical taproots of Ancistrocactus brevihamatus; and also the stems of immature Ancistrocactus brevihamatus, are not obscured by spines and are often flush with the soil surface, whereas those of Ancistrocactus scheeri are nearly hidden by spines and fully exposed above the soil.
Ribs on the stems of Ancistrocactus scheeri seem straighter and better defined than ribs of Ancistrocactus brevihamatus, even prior to sexual maturity.

Ancistrocactus scheeri (llifle.com)

https://youtu.be/8nUb36UA1Is

https://youtu.be/r6NObLjtyTo