It is a profusely clustering, mostly stemless species that forms expansive rosettes.
The leaves are dark green to maroon (deepening in high sun exposure), heavily decorated with distinct white spots or markings, and lined with sharp teeth along the margins.
True to its name (macrosiphon meaning "long tube"), it pushes up large, minimally branched inflorescences bearing elongated, tubular red or pinkish flowers that are highly attractive to pollinators.
