Hitchcock — TJic Grasses of HcvK'aii 149 



Open bogs, summit of mountains. Originally described from "top of 

 Mt. Eeka, :\Iaui." 



Molokai: Central part, Hitchcock 15 186. 

 Maui: Puu Kukui, Hitchcock 14730; Rock 8190, 16003; "Mt. Eeka", Forbes 369. 



2. Calamagrostis expansa (MunroJ. 



Dcyeuxia expansa Munro ; Hillebr. Fl. Haw. Isl. 519. 1888. 



Culms 50 to 60 cm. tall, erect, decumbent and naked below; sheaths minutely retorse- 

 scaberulous, overlapping rather closel}- along the middle of the culm ; ligule membranaceous, 

 I to 2 mm. long; blades flat or more or less involute, firm, 15 to 20 cm. long, as much as i cm. 

 wide, the uppermost near the panicle, 2 to 4 cm. long, ending in a hard sharp point, glabrous 

 beneath, scabrous on the upper surface; panicle oblong, contracted, 8 to 15 cm. long, the axis 

 and branches scabrous : glumes acuminate, about 7 mm. long, the keels scabrous ; lemma thin, 

 3 to 4 mm. long. 4-toothed at apex, the teeth slender, the callus .hairs abundant and a little 

 longer than the lemma; awn from near the middle, scabrous, spreading, about 5 mm. long; palea 

 a little shorter than the lemma, 2-toothed, scabrous on the keels ; rachilla prolongation about 0.5 

 to 2 mm. long with silky hairs similar to the callus hairs (fig. 34 J. 



The lemma is glabrous in Hitchcock's no. 14830 and scabrous in Forbes's 

 no. 371. Hillebrand, who had only a fragment, states that the lemma is glabrous. 

 The duplicate type in the Gray Herbarium is larger than the specimens cited below. 

 The panicle is 20 cm. long, and the blades as much as 1.5 cm. wide. 



Boggy places at upper altitudes. Originally described from "north bank of 

 the crater of Haleakala (U. S. E. Exp.)." 

 Maui: Edge of woods near bog, summit of Puu Kukui, Hitchcock 14830, "Mt. 



Eeke", Forbes 371. North bank of crater, East Maui, ^^llkes Expl. Exped. 



(Gray Herbarium). 



19. AGROSTIS L. 



Spikelets i-flowered, disarticulating above the glumes, the rachilla in most species not pro- 

 longed; glumes equal or nearly so, acute, acuminate, or even awn-pointed, carinate, usually scab- 

 rous on the keel and in some species also on the back ; lemma obtuse, usually shorter and thinner 

 in texture than the glumes, awnless or dorsally awned, often hairy on the callus ; palea usually 

 shorter than the lemma, 2-nerved in only a few species, in most species small and nerveless or 

 obsolete. Annual or usually perennial, delicate or moderately tall grasses, with glabrous culms, 

 mostly flat scabrous blades, and open or contracted panicles oi small spikelets. 



Lemma pubescent; panicle finally diffuse i. A. retrofracta. 



Lemma glabrous ; panicle more or less open but not diffuse. 

 Spikelets awnless ; plants spreading or decumbent. 



Panicle contracted and lobed or verticillate ; glumes scabrous on keel and back 



2. A. verticillata. 



Panicle more open; glumes scabrous on keel, smooth on back 3. A. stolonifera. 



Spikelets awned (some awnless in A. saiidzviccnsis). 



Panicle small but open 4. A. canina. 



Panicle contracted and spikelike. 



Plants solitary or few together in bogs 5. A. fallax. 



Plants strongly tufted. 



Blades involute 6. A. sandwicensis. 



Blades flat 7. A. exarata microphylla. 



I. Agrostis retrofracta Willd. Enum. PI. 94. 1809. 



Avena filifoniiis Forst. Prodr. 9. 1786. Not Agrostis filifonnis \'ill. 1787. 



[51] 



