A Guide to Identifying 100 Popular Agave Species | Complete Explanation of Titanota, Horrida, Parryi, and Geminiflora
A complete guide to the characteristics and identification methods of 100 popular Agave species. Introduces identification points and selection tips in detail, from Titanota, Horrida, Parryi, and Geminiflora to rare varieties.
Key Takeaways
A complete guide to the characteristics and identification methods of 100 popular Agave species. Introduces identification points and selection tips in detail, from Titanota, Horrida, Parryi, and Geminiflora to rare varieties.
Why Agave Identification is Difficult
The Agave genus (Agave) belongs to the Asparagaceae family (formerly Agavaceae) and comprises over 200 species classified primarily in North and Central America. Due to this diversity, many similar varieties exist, and accurate identification is often difficult because scientific names, common names, and clone names are often mixed.
The main issues are:
- Appearance changes due to cultivation environment: Even the same variety can display different leaf color and spine shape depending on light exposure, fertilizer, and temperature
- Diversity of common names: Cases where a single species has multiple commercial names (e.g., Titanota = titanota = Raijin)
- Increase in hybrids: Intentional and unintentional hybridization by growers has increased intermediate form specimens
In this article, we organize the representative varieties currently on the market by lineage and explain the key points for identification.
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Titanota Group (Agave titanota / A. oteroi)
The most popular group among Agave varieties. Characterized by compact rosette form and thick, white serrated teeth.
Agave Titanota (Agave titanota)
Identification points: - Continuous white to cream-colored serrated teeth extending toward the leaf tip - Leaves are relatively wide with gently tapered tips - Mature size: 30–60 cm diameter
Agave Oteroi (Agave oteroi)
Often confused with Titanota, but technically a different species.
Main differences from Titanota: - The serrated teeth are finer and more pointed, with weaker interlocking characteristics - Leaf green is slightly brighter with a tendency toward slender form - Mature plants tend to be slightly larger than Titanota
Popular Titanota Group Clones (Reference)
| Clone Name | Characteristics | Price Range (Approximate) |
|---|---|---|
| FO-076 | Wide white serrated teeth, compact | ¥10,000–80,000 |
| Hakugei (White Whale) | Dense pure white serrated teeth, high ornamental value | ¥20,000–150,000 |
| Caesar | Serrated teeth curve upward | ¥8,000–50,000 |
| Hades | Dark green leaves with contrasting white serrated teeth | ¥15,000–100,000 |
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Horrida Group (Agave horrida)
Native to central Mexico. Smaller and more compact than Titanota. Fine serrated teeth line gray-green leaves.
Identification points: - Leaf color is blue-tinged gray-green - Serrated teeth are fine and sharp, not as thick as Titanota - Rosette diameter: 20–40 cm, compact
Horrida Soul Food (A. horrida 'Soul Food')
A widely available clone. Popular for its beautiful fine serrated teeth along the leaf edges and compact size.
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Parryi Group (Agave parryi)
A cold-hardy lineage widely distributed in the southwestern United States. Characterized by blue-tinted gray leaves and large terminal spines.
Identification points: - Leaf color: Blue-gray to silver-gray - Terminal spine (apical spine) is long and dark brown - Rosette diameter: 50–90 cm, relatively large
Main Parryi Group Varieties
- Agave parryi var. truncata: Characteristic leaf shape with rounded, cut-off tips
- Agave parryi var. huachucensis: Fine serrated teeth with an overall slender appearance
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Geminiflora (Agave geminiflora)
Distinguished from other Agave by its unique silhouette of numerous thin leaves radiating outward.
Identification points: - 300–400 or more fine, thread-like leaves densely packed - White fibrous threads hang from leaf margins (filaments) - Spines are inconspicuous, making it safe to handle - Rosette diameter: 40–80 cm
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Utahensis / Desmethiana Group
Agave Utahensis (Agave utahensis)
Native to Utah in North America, ranked among the most cold-hardy. Small with slow growth, highly popular among collectors.
Identification points: - Leaf color: Gray-green - Spines are slender and sharp - Slow growth rate, mature diameter 30–50 cm - Cold hardiness: Can withstand below −20°C (depending on variety)
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Shawii Group (Agave shawii / schottii)
Agave Shawii (Agave shawii)
A medium-sized species native to Baja California. Beautiful wavy leaf margins.
Identification points: - Leaf margins undulate in a wavy pattern - Vibrant green color - Serrated teeth are relatively small and irregular
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Rare Lineages and Hard-to-Find Species
Agave Potatorum (Agave potatorum)
Native to Puebla, Mexico. Known as the wild ancestor of Raijin (Kissho Kan), it is among the finest for leaf beauty.
Identification points: - Uniform serrated teeth along leaf margins - Distinctively fine leaf tips with long terminal spines - Blue-tinted green
Price range: Premium specimens range from tens of thousands to hundreds of thousands of yen
Agave Nickelsiae (Agave nickelsiae)
An extremely rare species with limited availability. Distinctive beauty with dense white serrated teeth on slender leaves.
Agave Bracteosa (Agave bracteosa)
A rare specimen with little to no spines and octopus leg-like leaf shape. Extremely soft leaves make it safe for households with children.
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Identification Checklist
To accurately identify an Agave, check the following items:
| Checklist Item | Details to Verify |
|---|---|
| Leaf color | Green, gray-green, blue-green, silver |
| Leaf cross-section | Flat, convex, V-shaped |
| Terminal spine shape | Length, thickness, color |
| Serrated teeth shape | Size, spacing, color, continuity |
| Filaments | Present (fibers hanging down) or absent |
| Rosette shape | Spreading, upright, compact |
| Mature size | Small (≤30 cm diameter), medium (30–60 cm), large (≥60 cm) |
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Important Points When Purchasing Agave
Beware of Mislabeled Plants
Mislabeled specimens and low-quality plants sold under popular variety names have been confirmed. When purchasing:
- Verify multiple identification points
- Purchase from reputable growers or specialists
- Check cultivation records and photos of parent plants
Seed-Grown vs. Imported Specimens
Domestically seed-grown specimens have clear cultivation histories and typically good root condition, though they take longer to mature. Imported bare-root plants can provide large specimens at lower cost but carry re-rooting risk.
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Summary
Agave identification fundamentally requires comprehensive evaluation of leaf color, serrated teeth, terminal spines, presence or absence of filaments, and mature size. Beyond mainstream varieties like Titanota, Horrida, and Parryi, rare species such as Geminiflora, Utahensis, and Potatorum are also available on the market, offering diverse collecting opportunities.
Acquire your specimens from trusted growers with detailed variety information to enhance the quality of your Agave collection.