Big Needle Cactus vs Common corncockle

Coryphantha macromeris compared with Agrostemma githago

Key Differences

• Big Needle Cactus is Least Concern while Common corncockle is Critically Endangered.

Taxonomic Classification

Rank	Big Needle Cactus	Common corncockle
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order same	Caryophyllales (Caryophyllales)	Caryophyllales (Caryophyllales)
Family	Cactaceae	Caryophyllaceae
Genus	Coryphantha	Agrostemma
Species	Coryphantha macromeris	Agrostemma githago

Evolutionary Relationship

Big Needle Cactus and Common corncockle share a common ancestor at the Order level: Caryophyllales. (Caryophyllales)

Conservation Status

Big Needle Cactus

LC — Least Concern

Common corncockle

CR — Critically Endangered

Physical Characteristics

Attribute	Big Needle Cactus	Common corncockle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Big Needle Cactus

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Common corncockle

Habitat

Found across multiple habitat types including montane grasslands and shrublands, tropical and subtropical moist broadleaf forests, and temperate coniferous forests, among 13 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Lesotho), Asia (7 countries), Europe (24 countries), North America (Canada, Mexico, United States), Oceania and the Pacific (Australia), and South America (Brazil, Chile). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Big Needle Cactus

The Big Needle Cactus (Coryphantha macromeris) is a species in the genus Coryphantha. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Common corncockle

<em>Agrostemma githago</em>, commonly known as common corncockle, is an annual flowering plant in the family Caryophyllaceae. Once a widespread weed of cereal crops across Europe, Asia, and beyond, this species is now Critically Endangered on the IUCN Red List due to the dramatic decline caused by modern agricultural practices, particularly improved grain cleaning and herbicide use. Corncockle is a tall, slender plant covered in silky white hairs, bearing large, solitary pink to purple flowers with distinctive dark veining. Its seeds contain toxic saponin compounds called githagins, which historically contaminated grain supplies. The species now survives primarily in wildflower conservation areas, seed banks, and traditional farmland conservation schemes. It typically grows in open, disturbed arable soils with full sun exposure. Biological traits of this species remain poorly documented in the scientific literature.