Hitchcock — The Grasses of Hawaii 167 



to many in each spike, pectinate or more loosely arranged and appressed, the rachis of the spike 

 usually produced beyond the insertion of the spikelets. 



I. Bouteloua curtipendula (Michx.) Torr. in Emory, Notes Mil. Recon. 154. 1848. 



Chloris cuytipoidula Michx. Fl. Bor. Amer. 59. 1803. 



Plants perennial, tufted ; culms erect, slender, 30 to 60 cm. tall ; blades elongate, 2 to 3 mm. 

 wide, scabrous; inflorescence a i-sided raceme 10 to 20 cm. long of short deflexed spikes; spikes 

 8 to 10 mm. long, with few spikelets; lemma scabrous, ending in 3 short slender awns; sterile 

 lemma with 2 acute lobes and 3 straight awns, the lateral ones much shorter than the middle 

 awn (fig. 55). 



On United States Agricultural Experiment Station grounds (substation) 

 halfway up Mt. Tantalus. Introduced but apparently established away from origi- 

 nal planting. Originally described from Illinois. 

 Oahu: Hitchcock 14075, 14064. 



29. MICROLAENA R. Br. 



Spikelets with i perfect terminal floret and 2 aterile lemmas below, disarticulating above 

 the minute glumes ; sterile lemmas narrow, firm, awned from the tip ; fertile lemma hyaline, 

 compressed, shorter than the sterile lemmas ; palea narrow, compressed, nerveless, shorter than 

 the lemma ; lodicules 2, large, hyaline, broad. Perennial, rather low or lax grasses, with mostly 

 flat rather short blades and narrow loose panicles, the spikelets short-pediceled and appressed 

 along the axis or the main branches. 



I. Microlaena stipoides (Labill.) R. Br. Prodr. Fl. Nov. Hell. 210. 1810. 



Ehrhartia stipoides Labill. Nov. Holl. PI. 1:91. pi. 118. 1804. 



Culms more or less decumbent at base, glabrous ; sheaths glabrous or retrorsely scabrous, 

 shorter than the internodes; ligule a very short membrane; blades flat, spreading, mostly less 

 than 10 cm. long, 2 to 3 mm. wide, scabrous on the margins and upper surface; panicle narrow, 

 about 10 cm. long, mostly simple, the rather distant spikelets appressed along the slender main 

 axis, a few short branches below with 2 or 3 spikelets ; spikelets narrow, about i cm. long, the 

 pedicels i to 2 mm. long, the rachilla somewhat elongate above the glumes and between the 

 sterile lemmas; glumes very short, nerveless, unequal, less than i mm. long; sterile lemmas rather 

 firm, narrow, 5-nerved, scaberulous on the keels, the rather prominent callus pilose with 

 appressed hairs about i mm. long, the apex narrowed into a slender awn i to 1.5 cm. long, the 

 first shorter; fertile lemma compressed, faintly 7-nerved, about as long as the sterile lemma and 

 inclosed in its margins, scabrous on the keel, apiculate; palea similar to the lemma, a little 

 shorter, nerveless; lodicules 2, prominent, broad and hyaline, irregularly triangular, about i mm. 

 long; stamens 4; stigmas long and plumose (fig. 56). 



Open dry forest. Originally described from Tasmania. Also in Australia, 

 New Zealand, and the Philippines. 

 Hawaii : Puu Waawaa on summit of hill, Hitchcock 14465. 



30. ANTHOXANTHUM L. 



Spikelets with i terminal perfect floret and 2 sterile lennnas, the rachilla disarticulating 

 above the glumes, the sterile lemmas falling attached to the fertile floret ; glumes unec[ual, acute 

 or mucronate ; sterile lemmas shorter than the glumes, empty, awned from the back ; fertile 

 lemma shorter than the sterile ones, awnless; palea i-nerved, rounded on the back, inclosed in 

 the lemma. Sweet-smelling annual or perennial grasses, with flat blades and spikelike panicles. 



I. Anthoxanthum odoratum L. Sp. PL 28. 1753. Sweet vernal grass. 



Plants perennial ; culms slender, erect, 20 to 60 cm. tall ; panicle 3 to 8 cm. long, pointed ; 

 spikelets brownish green, 8 to 10 mm. long; glumes sparsely pilose; first sterile lemma short- 

 leg] 



