Hitchcock — The Grasses of Hawaii 153 



5. Agrostis fallax Hillebr. Fl. Haw. Isl. 516. 1888. 



Culms solitary or few together, with creeping rhizomes, erect, 15 to 30 cm. tall; sheaths 

 glabrous: ligule membranaceous, 3 mm. long; blades of innovations capillary, of the culm i to 

 2 mm. wide, all less than 10 cm. long: panicle narrow, spikelike, 5 to 10 cm. long-; glumes broad 

 at base, acute, 4 mm. long, scabrous on the keel : lemma rather broad, about 2 mm. long, obtuse, 

 the summit divided into 4. fine short teeth, the awn from below the middle, nearly straight or 

 somewhat bent, 3 mm. long', extending about to the tip of the glumes or a little beyond ; palea 

 none (tig. 37). 



Open bogs on summit of mountain. Originally described from "Plateau of 

 Mt. Eeka, Maui!" 

 Maui: Puu Kukui, Hitchcock 14729. Mt. Eeka, in summit swamp, 5000 feet, 



Rock 16001. 



6. Agrostis sandwicensis liillebr. Fl. Haw. Isl. 515. 1888. 



Agrostis rockii Hack. Repert. Nov. Sp. Fedde, 10:167. 1911- 



Plants densely tufted, the culms and blades generally stiffly upright; culms 30 to 50 cm. 

 tall, scabrous ; sheaths scabrous ; ligule acute, 3 mm. long ; blades tirm, scabrous, involute or 

 sometimes flat, i to 2 mm. wide when flat, sharp-pointed; panicle spikelike, 5 to 10 cm. long, the 

 branches and pedicels very scabrous ; glumes narrow, acuminate, 3 to 4 mm. long, scabrous on 

 keel and back; lemma thin, 2 mm. long, the faint nerves extending into minute teeth, the awn 

 from about the middle, bent and twisted below, about as long as the glumes, or reduced, or 

 almost wanting; palea wanting (fig. 39). 



Sandy or gravelly plains and slopes at upper altitudes, mostly from 8000 



to 1 1 000 feet. Originally described from "E. Maui! Oahu!" 



Maui: Haleakala Crater, Hitchcock 14976; Rock 8508 (type collection of A. 

 rockii), 16004. 



Hawaii: Kau Desert, Rock 12580. Hualalai ^lountains, Hitchcock 14529. 

 Mauna Kea, Hitchcock 14285, 14298, 14452; Forbes 474. Bullock Plains, 

 Wilkes Expl. Exped. Kukaiau Ranch, Hitchcock 14243. Kilauea Crater, 

 Hitchcock 14604. Mauna Loa, Hitchcock 1463 1. Xa Puu o Pele, \\'ilkes 

 Expl. Exped. Road from Kona to Volcano, Hitchcock 14592. Humuula 

 Sheep Station, Hitchcock 14418. Without locality, Mann & Brigham; 

 Remy 75 (Gray Herbarium). 



7. Agrostis exarata microphylla (Steud.) Hitchc. Amer. Journ. Bot. 2:303. 1915. 



Agrostis microphylla Steud. Syn. PI. Glum, i :i64. 1854. 



Culms tufted, 60 cm. tall, scabrous below the panicle ; sheaths scabrous : ligule 3 mm. 

 long; blades flat, rather lax, scabrous, 10 to 15 cm. long, 2 to 4 mm. wide; panicle contracted, 

 interrupted, 10 to 20 cm. long, branches and pedicels scabrous; spikelets in clusters, short- 

 pediceled, pale; glumes acute or acuminate, about 3 mm. long, scabrous on the keel and more 

 or less on the back; lemma thin, 1.5 mm. long, the awn from near the middle, twisted below, 

 geniculate or straight, extending about 2 mm. beyond the glumes: palea none (fig. 40). 



Moist places ; introduced. Originally described from western North 

 America. 



Hawaii: Kukaiau Ranch, 6000 feet, in a gulch, Hitchcock 14245. 



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