Kingcup cactus

What does Kingcup cactus look like?

Kingcup cactus grows in rounded mounds, sometimes spreading over a meter wide, with hundreds of short, cylindrical stems. The stems are green to bluish-green, ribbed, and covered in dense, yellow to dark spines. Each stem can reach up to 40 cm long and 15 cm across. In spring, the plant produces large, funnel-shaped flowers in vivid scarlet or orange-red, with a thick nectar chamber and many pink, threadlike stamens. Its fruits are round, reddish, and lose their spines as they ripen.

Where does Kingcup cactus come from?

This cactus is found in the deserts and uplands of the southwestern United States and northern Mexico, from low-lying arid regions to mountain woodlands. It has adapted to a wide range of elevations, from 150 to 3500 meters. The name Echinocereus triglochidiatus comes from Greek, referring to 'three glochids,' a kind of spine. Over time, it has developed several forms, some of which are recognized as subspecies or even separate species.

When and how Kingcup cactus blooms

Kingcup cactus blooms in spring, with flowers opening on mature stems. It grows in rocky or sandy soils, often in full sun, and can be found in both deserts and higher, cooler areas. The plant spreads by forming new shoots around old stems, creating large, cushion-like mounds. Seeds are spread by animals such as rodents and birds, and young plants often grow under the shelter of shrubs like fourwing saltbush.

How Kingcup cactus is used

This cactus is valued as the official state cactus of Colorado. Its bright flowers attract hummingbirds and bees, making it important for local pollinators. While not commonly grown for cut flowers, it is appreciated in wild gardens and natural landscapes. One variety, the Arizona Hedgehog cactus, is protected as an endangered species in the United States.

Kinds of Kingcup cactus

There are several forms of kingcup cactus, with differences in spine length, shape, and flower color. Western populations once grouped as 'mojavensis' include both curly and straight-spined types. The Arizona Hedgehog cactus, sometimes treated as a separate species, is rare and federally protected. Only the eastern form, var. triglochidiatus, is widely accepted as a variety.

What Kingcup cactus means

Kingcup cactus is a symbol of Colorado, chosen as the state cactus. Its vivid flowers and resilience in harsh landscapes have made it a notable plant in the American Southwest. The cactus is also important for wildlife, providing food for pollinators and shelter for small animals. Conservation efforts focus on protecting rare varieties from habitat loss.

Questions people ask about Kingcup cactus

Good reading and sources

• Echinocereus triglochidiatusUS Department of Agriculture, Article
• IUCN Red List of Threatened SpeciesIUCN Red List, Article
• Plants of the World OnlineRoyal Botanic Gardens, Kew, Plant database
• Where it has been recordedGBIF, Plant database
• Sightings and photos by naturalistsiNaturalist, Plant database

• Echinocereus triglochidiatus on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos
• Wikidata recordOpen data