Mapania tenuiscapa

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Mapania tenuiscapa


Leaves densely crowded, subcoriaceous, linear, with the midnerve prominent beneath, somewhat plicate lengthwise along several distinct lateral nerves, slightly narrowed towards the conduplicate base, very gradually narrowed into a long, flagelliform, triquetrous, aculeate-scabrous acumen, densely aculeate-scabrous throughout the margins and on the midnerve beneath, pale or bright green, up to 1 m by 7-10 mm; Inflorescence consisting of a single spikelet, ovoid when in fruit, terete, acute, 10-15 by 5-6(-10 when in fruit) mm. Flowers about as long as the glumes;


Asia-Tropical: Borneo present (Sarawak present); Malaya (Peninsular Malaysia present); New Guinea present; Thailand (Thailand present), Japen-Biak present, Johore present, Kedah present, Malacca present, P. Langkawi present, Pahang present, Palmer River present, Papua present, Perak present, W. New Guinea present
Thailand, Indo-China; in Malesia: Malay Peninsula (Kedah, Perak, Pahang, Malacca, Johore, P. Langkawi), Borneo (Sarawak), New Guinea (W. New Guinea: Japen-Biak; Papua: Palmer River).


CLARKE says that the spikelets are “more or less compound (i.e. basal partial spikes containing more than one spikelet)”. I always find them simple.
In the New Guinea specimens (M. archboldii.UITTIEN) the fruits are 6-7 mm long, in the other specimens examined 4-6 mm. Otherwise M. archboldii agrees in details with M. tenuiscapa.


Ridl. 1907 – In: Mat. Fl. Mal. Pen. (Monoc.): 105
Clarke 1898 – In: J. Linn. Soc. Bot.: 95
Clarke 1925 – In: Fl. Mal. Pen.: 173
Merr. 1921: En. Born.: 65
S.T. BLAKE 1947 – In: J. Arn. Arb.: 211
UITTIEN 1936 – In: Rec. Trav. Bot. Néerl.: 150