list of figures - Terry Sunderland

Not threatened (species distribution > 20,000 km²)
Table 33. The conservation status of African rattan species
Species Geographical range
(km²)
IUCN Category
Calamus deërratus 8,049,170 Not threatened
Eremospatha barendii One collection only Endangered
E. cabrae 1,918,050 Not threatened
E. cuspidata 1,891,190 Not threatened
E. haullevilleana 2,703,930 Not threatened
E. hookeri 1,102,420 Not threatened
E. laurentii 2,731,880 Not threatened
E. macrocarpa 4,259,660 Not threatened
E. quinquecostulata 9,276 Vulnerable
E. tessmanniana 5,899 Vulnerable
E. wendlandiana 604,086 Not threatened
Laccosperma acutiflorum 1,485,230 Not threatened
L. laeve 1,226,210 Not threatened
L. opacum 1,807,940 Not threatened
L. robustum 1,537,390 Not threatened
L. secundiflorum 3,195390 Not threatened
Oncocalamus macrospathus 701,830 Not threatened
O. mannii 129,432 Not threatened
O. tuleyi 18,423 Vulnerable
O. wrightianus 2,872 Endangered
9.3. HARVEST AND MANAGEMENT
9.3.1. Growth rates
Rattans are vigorous climbers with relatively high growth rates, and are thus able to be
harvested on a short cycle. For the majority of rattans, stem production from the
rosette stage (and the seedling bank) is initiated by exposure to adequate light. Stem
elongation is also affected by light and, whilst continuous, varies, usually on a
seasonal basis. Whilst no data on the growth rates of African rattans is available as
yet, results of long-term studies of the growth rates of selected Asian taxa are known.
Table 34. The growth rates of some commercial rattans in cultivation (Modifed from Dransfield
and Manokaran, 1994).
Species Growth rates (m / year)
Calamus caesius 2.9-5.6
Calamus egregius 0.8
Calamus hainanensis 3.5
Calamus manan 1.2
Calamus scipionum 1.0
Calamus tetradactylus 2.3
Calamus trachycoleus (5.0)
Daemonorops margaritae (2.0-2.5)
(Figures in brackets are estimates)
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