Pachyphytum bracteosum Link, Klotzsch & Otto
Silver Bracts / Large-Bracted Pachyphytum
Pachyphytum bracteosum, commonly called Silver Bracts, is a Mexican succulent that grows naturally on rocky cliff faces in Hidalgo, Querétaro, and San Luis Potosí. Its spatulate, silver-grey leaves are noticeably larger and flatter than those of other genus members, forming rosettes of elegant, architectural appearance.
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Overview
| Category | Classification |
|---|---|
| Family | Crassulaceae |
| Genus | Pachyphytum |
| Growth Habit | Single or sparsely branched rosette on an erect stem that may become lignified at the base; tends to produce basal offsets over time. |
| Conservation Status | Not formally assessed; Mexican endemic with fragmented populations in semiarid zones of the Sierra Madre Oriental. |
| pH Target | 6.0 – 7.0 |
| Type | Rocky calcareous soil, highly porous, nutrient-poor, with rapid drainage. |
Origin & Habitat
Morphology
Spatulate to obovate leaves 4–8 cm long and 2–4 cm wide, with grey-silver farina and entire margin; apex rounded with a small mucronate tip. Flatter than P. oviferum, storing less water but showing better tolerance to direct solar radiation.
ecoErect to suberect stem, 10–25 cm tall, robust, covered in persistent leaf scars; may become lignified at the base in mature plants.
ecoErect raceme 30–45 cm; tubular flowers deep red to orange-red, with prominent leafy bracts that give the species its name; spring flowering (March–May).
ecoFibrous and relatively shallow roots, capable of anchoring in narrow rock fissures; moderate nutrient-absorption capacity.
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Requirements
Soil & Substrate
Type
Rocky calcareous soil, highly porous, nutrient-poor, with rapid drainage.
groups Beneficial Associations
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Propagation Strategy
- 1 Choose a fully mature, spatulate silver leaf; gently twist it until it detaches cleanly at the base.
- 2 Hold the leaf only at its basal end and allow it to callus for 2–4 days in a shaded, well-ventilated spot.
- 3 Place the leaf on dry mineral substrate; its larger size compared to other species in the genus allows good contact with the substrate.
- 4 Lightly mist the substrate every 6–8 days; roots and plantlets will appear at the base in 4–6 weeks.
- 5 Transplant plantlets when they reach 1–2 cm, always using tweezers to preserve the pruina.
- 1 Cut a stem with sterilized scissors, leaving a rosette on the cutting and some leaves on the mother plant.
- 2 Remove lower leaves by holding only their base; set these aside for additional leaf propagation.
- 3 Allow the cut end to callus for 3–5 days in an airy spot without intense sun.
- 4 Plant in dry mineral substrate; begin gentle watering 7–10 days after planting.
Never touch the pruina/farina; handle leaves and stems at their base only. Fingerprints permanently damage the silver coating.
Handling leaves directly with fingers, smudging and irreversibly damaging the characteristic silver pruina.
Every 2–3 years in spring. Use shallow terracotta pots, slightly larger than the rosette.
Once a month in spring and summer with cactus fertilizer at half dose. No fertilizer in autumn-winter.
Uses & Applications
Precautions / Toxicity
No documented toxicity for humans or domestic animals; considered safe in collections.
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"The epithet «bracteosum» refers to the leafy bracts accompanying the flowers in the inflorescence, an unusual character within the genus that aids identification even in bloom. The bracts carry the same farina as vegetative leaves."
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Scientific Integrity
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Sources
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Discussion
Disclaimer
This species record is provided for educational and informational purposes only. Jardín Roca Negra does not guarantee the accuracy or completeness of the data. Content is community-curated and may be subject to revision; it should not replace advice from a qualified botanist. This species may be toxic, invasive, or subject to legal restrictions — verify before handling or cultivating. Jardín Roca Negra accepts no liability for any harm arising from reliance on this information. Images are reproduced under Creative Commons or equivalent free licenses; credits are noted below each image.