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Distribution and habitat:—From 0°00’–0°37’S and 70°11–72°26’W in Colombia (Amazonas, Vaupés)<br />
at 194(160–250) m elevation along margins of blackwater streams (Fig. 7).<br />
Taxonomic notes:—Except for its short, recurved, swollen-based rachis spines and peduncular bracts, D.<br />
interjectus strongly resembles D. horridus subsp. palustris. This subspecies, as noted above, has rachis spines<br />
which are less developed than in other subspecies, and in some cases are abaxial and appear short and<br />
recurved, almost like those of D. polyacanthos. In fact, D. interjectus appears more similar to D. horridus than<br />
to other species with recurved rachis spines, and its recurved rachis spines may be secondarily derived from<br />
straight spines.<br />
FIGURE 7. Distribution maps of Desmoncus horridus subsp. prostratus, D. interjectus, D. kunarius, and D. latisectus<br />
7. Desmoncus kunarius de Nevers ex Henderson, sp. nov. (Appendix IV Plates 6–12)<br />
A speciebus aliis crusta fructuum fibris subepidemalibus numerosis, brevibus atque obliquis tuberculata differt.<br />
Type:—PANAMA. Panama: El Llano–Cartí road, 16–18½ km by road N of Pan. Am. Hwy. at El Llano, 400–450 m, 28<br />
March 1974, M. Nee & E. Tyson 10982 (holotype PMA!, isotype MO!).<br />
Plants height no data; stems 3.3(3.1–3.6) cm diameter. Leaf petioles 4.5(3.0–5.5) cm long; rachises 100.0 cm<br />
long, 14.2(11.6–18.5) mm wide, the spines usually >1 cm long, mostly adaxial or lateral, straight with briefly<br />
swollen bases; pinnae 19 per side of rachis, without long, filiform apices, with an adaxial beard of spines at<br />
the bases, without spinules or dense tomentum at the bases adaxially; basal pinna 29.5 cm long, 4 cm wide;<br />
A REVISION OF DESMONCUS (ARECACEAE)<br />
Phytotaxa 35 © 2011 <strong>Magnolia</strong> <strong>Press</strong> 27
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