Leptocereus
| Leptocereus | |
|---|---|
| File:Leptocereus quadricostatus.jpg | |
| Kingdom | Plantae |
| Family | Cactaceae |
| Subfamily | Cactoideae |
| Tribe | Phyllocacteae |
| SubTribe | Corryocactinae |
| Genus | Leptocereus |
| Species | |
| Notes | Taxonomy follows Joël Lodé (2015). A primitive genus of shrubby cacti endemic to the Caribbean. |
Etymology
The name is derived from the Greek leptos (slender) and the Latin cereus (wax candle), referring to the thin, deeply ribbed stems characteristic of the genus.
Description
Leptocereus consists of shrubby or tree-like cacti, often with sprawling or semi-erect branches.
- Stems: Thin, cylindrical, and divided into segments. They are characterized by having few but very prominent and thin ribs (usually 3 to 8).
- Areoles: Small, bearing numerous needle-like, often very sharp and stiff spines.
- Flowers: Diurnal or nocturnal (depending on the species), appearing near the apex. They are funnel-shaped to bell-shaped, relatively small, and usually greenish-white, yellowish, or cream-colored. The floral tube is typically covered with spines or bristles.
- Fruits: Globose to ovoid berries, often covered with deciduous spines. They are fleshy and greenish or reddish when ripe.
- Seeds: Small, black, and pitted.
Habitat
The genus grows in dry tropical forests, coastal thickets, and on limestone cliffs (mogotes). They are well-adapted to the hot, maritime climate of the Greater Antilles. Altitudinal range: 0–600 m.
Distribution
- Caribbean: Primarily Cuba (center of diversity), Dominican Republic, Haiti, Puerto Rico, and the British Virgin Islands.
Species and Subspecies
Following the classification of Lodé (2015), the genus includes 15 recognized species and 2 subspecies:
- Leptocereus arboreus
- Leptocereus assurgens
- Leptocereus carinatus
- Leptocereus ekmanii
- Leptocereus grantianus
- Leptocereus leonii
- Leptocereus maxonii
- Leptocereus paniculatus
- Leptocereus quadricostatus
- Leptocereus santamarinae
- Leptocereus scopulophilus
- Leptocereus sylvestris
- Leptocereus weisneri
- Leptocereus wrightii
- Leptocereus yunckeri
Taxonomy
Lodé maintains Leptocereus in the subtribe Corryocactinae. Molecular studies confirm its isolated and primitive position. It is often considered a "relic" genus, representing an early stage in the radiation of the tribe Phyllocacteae across the Caribbean islands.
