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Plant identification guide.
| Plants with areoles – rounded agglomerations of dense short hairs – which usually, out the center, give rise to longer spines, pellicles or hairs. Areoles may be distributed on all surface of stem or on edges and papillae. - Cactuses. |
Plants without areoles. Stems numerous, sappy, always square in cross section. Large, not pricking cogs stick out of edges of stems. Lateral shoots partly decumbent. - Stapelia. |
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