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Taxonomic notes on Encephalartos ferox (Cycadales: Zamiaceae), with the description of a new subspecies from Mozambique
Journal Article
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Rousseau P, Vorster PJ, Afonso AV, Van Wyk AE. 2015. Taxonomic notes on Encephalartos ferox (Cycadales: Zamiaceae), with the description of a new subspecies from Mozambique. Phytotaxa 204
(2): 99-115.
https://doi.org/10.11646/phytotaxa.204.2.1.
Abstract
Continued work on the systematics of the genus Encephalartos has been conducted over a large area along the Mozambican
coast to determine the infraspecific variation and taxonomic status of Encephalartos ferox populations. The northern extent
of the species was also investigated based on anecdotal information that it might represent a new taxon. Several (45) vegetative
and reproductive (ca. 40) characters were analysed and used to re-circumscribe E. ferox. Literature and iconographic
citations are included, as is information on ecology, cytology and conservation as available. No specimens of E. ferox were
located north of the Save River in the Sofala Province, Mozambique, and the northernmost population of the species was
found to be anomalous. Accordingly a new subspecies, E. ferox subsp. emersus, is recognised based on its invariably emergent
stems, shorter unarmed petiole length, shorter leaves, greater number and narrower leaflets (in seedlings as well) which
are more closely spaced. Strobili and peduncles in subsp. emersus are shorter and narrower with strobili having a propensity
towards yellow, while internally the megasporophylls are green, grading to white away from the outer surface. The IUCN
Red List status is suggested as Critically Endangered A4d + B1a,b(v) + B2a,b(v), with the threat of illegal over-collection
highlighted.
Linked Species (3)
| Scientific Name | Status | Pages | Plates | Comments |
|---|---|---|---|---|
| Description | 99-115 | 3-9 | ||
| Protologue | 99-115 |
Protologue description
|
||
| Description | 99-115 | 3, 5A-B & 7C-D |
Autonym generaed
|
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