Crassula columnaris

Crassula columnaris is a small succulent in the stonecrop family, Crassulaceae. Its common names include upright crassula and khaki button. It comes from South Africa’s Cape region. Records place it in the Eastern, Northern and Western Cape. It grows mainly in the Succulent Karoo. Its habitats include gravel flats in Namaqualand and quartz fields in the Knersvlakte. Plant colours blend with the dry, stony ground around them.

This plant forms a compact body with a short, upright stem. Its stated height range is about 0.05–0.20 feet [0.015–0.06 metres]. Some stems reach about 0.23 feet [0.07 metres]. Plants in the wild can sit low in the ground. Their shape can look round rather than tall. In cultivation, they develop a more column-like form. Most remain unbranched, though short shoots can form near the base. The roots are fibrous. Eight to ten pairs of leaves hide the thin stem.

The fleshy leaves range from grey-green to brownish green. They overlap in four tight rows around the stem. Each leaf is broader than it is long. The leaves have no stalks, and their bases join together. Their inner faces curve inward, while their outer faces bulge outward. Rounded tips and fine hairs along the edges add detail. Upper leaves grow smaller, so the whole body tapers. This tight leaf pattern gives the plant much of its distinct form.

Plants take five to ten years to reach maturity. Rain can prompt a mature plant to open and flower. Many small blooms crowd into a head at the top. Upper leaves may hide part of this flower head. The flowers have a sweet scent. Their colour ranges from white to cream or pale yellow. Some show red tones, and the broader account also mentions orange-yellow. The petals join at the base and narrow toward blunt tips. Anthers range from yellow to brown. The plant is monocarpic: it dies after flowering.

The species rests during summer and comes from a subtropical region. The supplied sources give no tested frost limit or detailed garden-care routine. They also give no species-level evidence about pests, diseases or landscape uses. No supplied account establishes edible parts or safety for people and pets.