CHASE, PAPUAN GRASSES, III PAPUAN GRASSES COLLECTED BY L. J. BRASS, III* AGNES CHASE With four text-figures THE grasses here enumerated were collected in 1938-39, in Papua andin Netherlands New Guinea. Part I of Papuan Grasses collected by Mr.Brass, by A. S. Hitchcock, was published in Brittonia 2: 107-130. 1936,Part II, by Agnes Chase, in the Journal of the Arnold Arboretum 20:304-316. 1939. The types of the species here described are deposited in theGray Herbarium, with isotypes in the United States National Herbarium.Species previously collected by Mr. Brass in Papua are not included in thepresent paper, except when collected in Netherlands New Guinea. A fewcollections by J. and M. S. Clemens or by Mrs. Clemens are included whenthey represent species not before collected in New Guinea.Oreiostachys producta Pilger, Bot. Jahrb. Engler 62: 460. 1929. NETHERLANDS NEW GUINEA: Bele River, 18 kilometers northeast of Lake Habbema,alt. 2300 m., Brass 11072; abundant in forest margins, downfall openings, etc., scram-bling and tangled; flowering specimen. Eighteen kilometers southwest of BernhardCamp, Idenburg River, alt. 2150 m., Brass 12662; scrambling to 5-6 m. in mossyforest, frequent at 1800 m., and on the highest point of the ridge at 2200 m., forminga high dense undergrowth, practically excluding the usual undergrowth and substagetrees; sterile specimen. These collections agree well throughout with Pilger's description. Thepalea is 2-keeled and sulcate toward the summit, the rachilla segment isprolonged and bears a rudimentary floret, the rachilla and rudiment reach-ing the apex of the palea. Henrard (Blumea 2: 71. 1936), in reestablish-ing the genus Chloothamnus Buse, reducing Oreiostachys Gamble to it as asynonym, states that because of the prolonged rachilla segment and rudi-mentary floret he hesitated to place 0. producta in the genus Chloothamnus.Endemic.Chloothamnus sp. NETHERLANDS NEW GUINEA: Six kilometers southwest of Bernhard Camp, IdenburgRiver, alt. 1450 m., Brass 13020; "upper limits of rain-forests; occasional open clumpsof few stout stems up to -4 cm. diam. at base, 7-8 m. long, upper part weak, restingon substage trees; internodes up to --45 cm. long; leaves glaucous below; spikeletsglaucous." The specimen, which consists of an internode and two nodes of a stoutculm and four flowering twigs, agrees with the generic description ofChloothamnus but differs from any known species in the open panicles, thestiff branches having pronounced pulvini at their base. An over mature specimen collected in "Lower regions of British NewGuinea" in 1894 by MacGregor, no. 49, is apparently the same species. *Botanical Results of the third Archbold Expedition.19431
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