Hitchcock — The Grasses of Hazvaii 147 



the silvery shining spikelets 3 mm. long, clustered toward the ends of the spreading capillary 

 branches: lemma of both florets with a geniculate awn 4 mm. long, the teeth setaceous (fig. 33). 



A weed along trail, 4000 to 6000 feet; introduced. Originally described 

 from Europe. 

 Maui: Haleakala Crater, Hitchcock 14973. Along Olinda pipe line in very wet 



forest, Hitchcock 14938. 



17. NOTHOLCUS Nash. 



Spikelets 2-flowered, the pedicel disarticulating below the glumes, the rachilla curved and 

 somewhat elongate below the first floret, not prolonged above the second floret ; glumes about 

 equal, longer than the two florets ; first floret perfect, its lemma awnless ; second floret staminate, 

 its lemma awned on the back. Perennial grasses, with flat blades and contracted panicles. 



I. Notholcus lanatus (L.) Nash; Hitchc. in Jepson, Fl. Calif. 1:126. 1912. Velvet grass. 



Holms lanatus L. Sp. PI. 1048. 1753. 



Plants grayish, velvety-pubescent ; culms erect, 30 to 60 cm. tall ; panicle 5 to 10 cm. long, 

 narrow, contracted, sometimes almost spikelike, purple-tinged ; spikelets 4 mm. long ; glumes 

 villous, hirsute on the nerves, the second broader than the first, 3-nerved; lemmas ciliate at the 

 apex; awn of the second floret hooklike (fig. 32). 



Pasture land at medium altitudes ; introduced. Originally described from 

 Europe. 

 Hawaii: Kukaiau Ranch, Elitchcock 14204, 14252. Paauhau, Rock 3437. 



18. CALAMAGROSTIS Adans. 



Spikelets i -flowered, the rachilla disarticulating above the glumes, generally prolonged 

 behind the palea as a short, commonly hairy bristle; glumes about equal, acute or acuminate; 

 lemma shorter and as a rule more delicate than the glumes, the callus bearing a tuft of hairs, 

 these in many species copious and as long as the lemma, awned from the back, usually below 

 the middle, the awn being delicate and straight, or stouter and exserted, bent and sometimes 

 twisted ; palea shorter than the lemma. Perennial, usually moderately tall or robust grasses, with 

 small spikelets in open or usually narrow, sometimes spikelike panicles. 



Callus hairs very short i. C. hillebrandi 



Callus hairs longer than the floret 2. C. expansa. 



I. Calamagrostis hillebrandi (Munro). 



Dcycii.via hillebrandi Munro; Hillebr. Fl. Haw. Isl. 519. 1888. 



Culms tufted, apparently with slender rhizomes, erect, glabrous, 30 to 50 cm. tall ; sheaths 

 glabrous, longer than the internodes ; ligule a membrane about i mm. long, erose ; blades flat or 

 more or less involute, those of the midculm 10 to 15 cm. long, 2 to 4 mm. wide when flat, the 

 uppermost near the panicle, 2 to 4 cm. long, all very scabrous on the upper surface, glabrous 

 or nearly so beneath, firm and stiff ; panicle ovate, 5 to 10 cm. long, 3 to 7 cm. wide, rather 

 loose, the branches ascending, glabrous, commonly pubescent about the base, the lower in fas- 

 cicles, naked below, branching below the middle ; glumes nearly equal, acuminate, 4 to 6 mm. 

 long, glabrous including the keel ; lemma 4 to 5 mm. long, firm, faintly 5-nerved, short-pilose at 

 base, the hyaline apex 4-toothed, the teeth extending into slender awns as much as i mm. long; 

 awn dorsal, arising above the middle, scabrous, curved-spreading, 5 to 10 mm. long: palea nearly 

 as long as the lemma, sharply 2-toothed, scaberulous on the keels ; rachilla prolongation more 

 than half as long as the lemma, silky-villous, the hairs extendmg as far as the tip of the lemma 

 (fig- 31)- 



[49] 



