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Graminae: Eragrostis leptostachya

E.Y.Hosaka, 1848


Eragrostis leptostachya aka Hosakai

Original Distribution

US, Hawaii, Moloka’i, Mauna Loa

Extinction Data

IUCN = N/a


Spikelets breaking up at maturity, Rhachilla tough and persisting after the lemmas have fallen or at least in the lower hald palea keels glabrous or obscurely ciliolate. Plants annual sometimes short lived. Leaf blates without glands on the margins. Palea persisting on rhachilla at maturity. Spikelets linear or oblong, 0.7-2mm wide; lowest panicle branches whorled. Panical exsertied well above basal leaves. Upper glume as long as adjacent lemma or almost so. Panical open, lanceolate to ovate, the branches spreading, leaf blades mostly flat. Panicle contracted, linear, the branches appressed; leaf-blades mostly convolute, 1-2mm wide. Pedicels 2-6mm long with angulae gland. pedicels 5-15mm long eglandular.

Number of Specimens at Kew


Specimen Type (Y/N)


Kew Herbcat Barcode Number



E.Y. Hosaka

Collector Number


Date Collected

16th April 1937

Other Information

Ref - Notes on the grasses of Hawaii: new record, corrections and Name changes; Derral, R.H - Hawaii Biological survey, Bishop Muesum, Hawaii & Clayton, W.D. - RBG Kew (1997)

Information Sources

Wagner, W., Herbst, D. & Sohmer, S. (1990). Manual of the flowering plants of Hawaii. University of Hawaii Press, Bishop Museum Press, Honolulu.Walter, K.S. and Gillett, H.J. (eds) (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre IUCN – The World Conservation Union, Gland, Switzerland and Cambridge, UK