Bulbostylis densa

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Bulbostylis densa


Leaves much shorter than the stems, capillary, glabrous (except for the long white hairs at the orifice of the sheaths), slightly scaberulous at the top, ¼-⅓ mm wide. Inflorescence very variable, simple or subcompound, with 1-many spikelets, in Mal. usually very loose, up to 5 cm long. Stamens 2;


Alor present, Asia-Temperate, Asia-Tropical: Lesser Sunda Is. present (Bali present); New Guinea present; Philippines (Philippines present), Atjeh present, Australasia, Benguet present, Bontoc present, Cagayan present, Central and E. Java present, E. Coast Res present, Japan present, Lepanto present, Lombok present, Luzon present, N. Sumatra present, Old World tropics and subtropics present, Pampanga present, S. and E. Asia present, SW. Celebes present, Tropical Africa present, Wetar present
Widely distributed in the Old World tropics and subtropics: S. and E. Asia to China and Japan, tropical Africa and Australia, in Malesia: N. Sumatra (Atjeh, E. Coast Res.), Central and E. Java, Lesser Sunda Islands (Bali, Lombok, Wetar, Alor), Philippines (Luzon: Cagayan, Pampanga, Lepanto, Bontoc, Benguet), SW. Celebes, and New Guinea.


B. densa is very near to the American B. capillaris (L.) CLARKE, differing by the more acute, glabrous or only slightly pubescent glumes, and the granular, not or hardly transversely rugulose nuts.
Remarkable specimens of this species were col- lected on Mt Pulog in Luzon (FB 16143; MERRILL Philip. Pl. 541): the inflorescence is reduced to 1-3 spikelets, the latter are larger than usual, c. 3 mm wide; the glumes c. 3 mm long; the nuts broadly obovate to turbinate, 1.1 by 0.95 mm; the anthers somewhat longer than usual, c. ½ mm. The cited collections may represent a local race of this extremely variable species.
Isolepis trichocolea STEUD. was based on ZOLLINGER 613. The sheet in STEUDEL'S herbarium (P) contains two specimens, one of which is B. densa, the other B. barbata. Hence STEUDEL'S description partly refers to the former species, partly to the latter. In accordance with CLARKE (), the specimen of B. densa is selected as the type.


STEUD. 1855 – In: Syn.: 96
Miq. 1856 – In: Fl. Ind. Bat.: 308
KERN 1968 – In: Back. & Bakh.f., Fl. Java 3: 468
Miq. 1856 – In: Fl. Ind. Bat.: 320
HARA 1942 – In: J. Jap. Bot.: 467
OHWI 1944 – In: Mem. Coll. Sc. Kyoto B: 50
STEUD. 1855 – In: Syn.: 111
Clarke 1907 – In: Philip. J. Sc.: Bot. 98
Miq. 1856 – In: Fl. Ind. Bat.: 312