Hitchcock — Tlic Grasses of Hazvaii 187 



4. Panicum nubigenum Kunth, Enum. PI. i -.gS. 1833. 



Paniciim iiiontaninn Gaud. Voy. Uran. Bot. 411. 1830 (title page 1826). Not Panicum 

 iiionfannin Roxb. 1820. 



Neurachne montanum Gaud. Voy. Uran. Bot. Atlas pi. 26. 1830. 



Plants annual ; culms commonly much branched and spreading, 10 to 30 cm. tall, puberu- 

 lent, more or less villous at the nodes ; sheaths puberulent ; ligule a dense line of hairs i to 2 mm. 

 long; blades flat or involute, mostly less than 10 cm. long, i to 2 mm. wide, puberulent beneath, 

 pilose on the upper surface, subulate-pointed ; panicles numerous, greenish or tawny, narrow, 

 I to 5 cm. long, usually included at base in the uppermost sheath, the branches appressed, 

 angled, pilose : spikelets about 2,5 mm. long, acuminate ; glumes pubescent, the acuminate apex 

 pilose, the erect hairs forming a terminal tuft, the first a little longer, 5-nerved, the second 

 7-nerved : sterile lemma a little shorter than the glumes, glabrous, 7-nerved, the palea elliptic, 

 one-third as long as the lemma; fertile lemma 1.5 mm. long, 7-nerved, the palea inclosed at the 

 margins (fig. 72). 



Dry plains and slopes. Originally described from "Insnlis Sandwicen- 

 sibus." 



Oahu: Mokolii Island, Rock 12766; Koko Head, Forbes 2414, 2447. 

 Molokai : ^^'ithout locality, Stokes in 1909. 

 Lanai: Mamali, G. C. Munro, April 23, 191 7. Kahalepaloa, G. C. Alunro, 



Mar. 6, 1917. 

 Hawaii : Without localit}-, Wilkes Explor. Exped. 



5. Panicum kauaiense sp. nov. 



Plants annual, glabrous except the spikelets ; culms branching at base, 30 cm. tall ; ligule 

 about 0.5 mm. long, a shoit membrane dissected into hairs ; blades flat, involute at the long and 

 slender point, 10 to 15 cm. long, i to 3 mm. wide; panicles tawny, narrow, 5 to 8 cm. long, the 

 axis and branches scabrous, the lower branches as much as 5 cm. long ; spikelets narrow, 

 acuminate, 3 mm. long, pubescent, appressed along the branches ; glumes acuminate, pilose, the 

 hairs ascending as much as i mm. long; first glume a little shorter than the second, about 

 5-nerved, the second 7-nerved ; sterile lemma intermediate in length between the glumes, glabrous, 

 7-nerved, the palea narrow, about one-fourth as long as the lemma ; fertile lemma narrow, acute, 

 1.7 mm. long (fig. 76). 



Type in the U. S. National Herbarium, no. 836228, collected in Haupu 

 Range, near Nawiliwili Bay, Kauai, Hawaiian islands, October 31, 1916, by 

 C. N. Forbes (no. 703). 



A collection from East Maui by the Wilkes Expedition appears to be this 

 species but differs in having the leaves minutely hispidulous and the nodes slightly 

 villous. 



6. Panicum pellitum Trin. Gram. Pan. 198. 1826; Sp. Gram. 2: pi. 22,y. 1829. 



Paiiicuin gossypina Hook. & Arn. Bot. Beechey Voy. 100. 1841. 



Plants annual ; culms erect or decumbent at base, 30 to 50 cm. tall, glabrous or pubescent, 

 the nodes pilose; sheaths papillose-pilose or glabrescent ; ligule a line of hairs i mm. long; 

 blades flat, 5 to 15 cm. long, as much as 5 mm. wide, pilose; panicle 10 to 15 cm. long, rather 

 loose, the branches ascending, as much as 10 cm. long; spikelets appressed, acuminate, 2 mm. 

 long or, because of the longer point, 3 mm. long ; glumes about equal, pilose on the upper part 

 with a few hairs i mm. long from a papillose base, the first 3-nerved, the second 5-nerved ; 

 sterile lemma a little shorter than the glumes, glabrous, 7-nerved, the palea oval, one-third as 

 long as the lemma; fertile lemma 1.2 mm. long (fig. 75). 



I 89 ] 



