Hitchcock — The Grasses of Hazmii 165 



A weed along streets ; introduced. Originally described from Jamaica. 



Kauai: Olokele Gulch, Hitchcock 15250. 



Oahu: Honolulu, Hitchcock 13681, 14121. Waikiki, Heller 1963. Without local- 

 ity, Remy 76 (Gray Herbarium). 



Lanai : Mr. Gay's place, Hitchcock 14722. 



Hawaii: Halawa, Faurie 1283. 



Without locality: Hillebrand. 



3. ChJoris gayana Kunth, Rev. Gram, i -.Sg. 1829. Rhodes grass. 



Plants perennial, producing strong creeping stolons; culms stout, 60 to 120 cm. tall, com- 

 pressed; blades elongate, scabrous, as much as 7 mm. wide; spikes ascending, rather thick, sev- 

 eral to manjr, 6 to 9 cm. long; glumes unequal, rather broad, the first acute, 1.5 mm. long, the 

 second mucronate, 2 mm. long; fertile lemma oblong, acute, 3 mm. long, the marginal nerves 

 short-pilose below, longer-pilose above, the awn below the tip, about 2 mm. long; first sterile 

 lemma oblong, similar in shape to the fertile lemma, 2.5 mm. long, glabrous, the awn about 

 1.5 mm. long, the palea as long as the lemma; second sterile lemma an oblong truncate rudiment 

 about I mm. long on a slender stipe, awnless (fig. 53). 



Introduced as a meadow grass and cultivated in the drier parts. Tending to 

 become established. Originally described from Africa. 

 Oahu: Schofield Barracks, open grassland, becoming well established, Hitchcock 



13946. Honolulu, Kalihi Valley, Hitchcock 14088. 

 Lanai : Upper part of mountain, Hitchcock 14641. 

 Maui: Without locality, Curran 18. 

 Hawaii : Puu Waawaa, hay field on Mr. Hind's ranch, Hitchcock 14492. Pasture 



on north side of Mauna Kea, Hitchcock 14296. 



4. Chloris truncata R. Br. Prodr. Fl. Nov. Holl. 186. 1810. 



Plants perennial; culms tufted, erect, or decumbent at base, 10 to 30 cm. tall; sheaths 

 compressed; blades flat or folded, short, i to 2 mm. wide; spikes several in i or 2 whorls, 

 finally spreading, slender, 5 to 10 cm. long, pubescent at base ; spikelets 3 mm. long, narrowly 

 wedge-shaped, appressed along the rachis ; first glume narrow, acuminate, a little over i mm. 

 long; second glume nearly as long as spikelet, apiculate, hyaline; fertile lemma black, oblong- 

 cuneate, truncate at apex, short-pilose at base and appressed-ciliolate on the marginal nerves 

 above, the awn about 1 cm. long; rudiment black, truncate-cuneate, about half as long as the 

 spikelet and raised on a stipe of about its own length (fig. 54). 



Open grassland; introduced. Originally described from Australia. 

 Oahu: Fort Shafter, Honolulu, Hitchcock 13849. 

 Also grown at United States Agricultural Experiment Station, Westgate, Oct. 9, 



1915- 



28. BOUTELOUA Lag. 



Spikelets i-flowered, with the rudiments of one or more florets above, sessile, in two 

 rows along one side of the rachis; glumes unequal, i-nerved, acuminate or awn-tipped, the first 

 shorter and narrower ; lemma as long as the second glume or a little longer, 3-nerved, the 

 nervcb extending into awns, the internerves usually extending into teeth ; palea 2-nerved, 

 sometimes 2-awned ; rudiment various, commonly 3-awned, a second rudimentary floret present, 

 in some species. Perennial or a few species annual, low or rather tall grasses, with two to 

 several or many spikes racemose on a common axis, or in some species solitary, the spikelets few 



[67I 



