Hitchcock — TJic Grasses of Hawaii 185 



scabrous and somewhat villous : spikelets acuminate, 4 mm. long, the lower half hidden by the 

 dense pubescence ; glumes equal, 5-nerved, acuminate, the lower two-thirds densely long-villous, 

 the hairs spreading, i to 2 mm. long, the upper third pubescent only; sterile lemma a little 

 shorter than the glumes, 7-nerved, pubescent, or appressed-villous toward the apex, the palea 

 wanting; fertile lemma rather thin, oblong-elliptic, 2 mm. long, the palea enclosed only at the 

 margins (fig. Jt,). 



Open dry plains of lee side. Originally described from the "Sandwich 

 Islands." 



Molokai: North coast, G. C. Munro in 1903. 

 Lanai : Kahalepaloa, Munro 6 and 6b in 1917. Maneli, Munro in 1917; May 2, 



1918. 



3. Paniciim torridum Gaud, in Freyc. Voy. Uran. Bot. 411. 1830. 



Panicum cinereum Hillebr. Fl. Haw. Isl. 500. 1888. 



Plants annual ; culms erect, or branched and decumbent at base, 20 to 60 cm. tall, or even 

 taller, densely soft-pubescent or villous; sheaths and blades soft-pubescent or villous like the 

 culms; ligule a short ciliate membrane alxiut i mm. long; blades 10 to 20 cm. long, as much as 

 I cm. wide; panicle green or tawny, oblong-elliptic, rather densely flowered, 3 to 15 cm. long, 

 I to 4 cm. wide, the approximate branches ascending, closely flowered ; spikelets 3 mm. long, 

 acuminate; glumes nearly equal, acuminate, the first a little shorter, 3 to 5-nerved, the second 

 5 to 7-nerved, both villous with ascending or spreading hairs 2 to 3 mm. long from papillae, 

 the hairs not dense enough to hide the glumes ; sterile lemma acute, as large as the first glume 

 except the acuminate point, 7-nerved, glabrous, or sparsely villous on upper part, the palea 

 triangular-acute, about half as long as the lemma; fertile lemma 1.5 mm. long, the palea 

 inclosed only at the margins (fig. 74). 



Hillebrand describes this species as having a hairy sterile lemma. In our 

 specimens the sterile lemma is usually glabrous. In some specimens, c. g., Wilkes 

 Exped., labeled "P. pellitum," and Forbes 2415, which appear to differ in no other 

 respect, the sterile lemma is pilose on the upper part. 



We have seen no authentic specimens of Paniciiiii cincreuiu, though a 

 Mann and Brigham specimen has been so labeled (cited below). From the 

 description it appears to be referable to P. torridum, except for the peculiar ligule. 

 Hillebrand says, "sheath ending in the blade with a broad beak-like truncate pro- 

 jection of about 6" [6 lines or 12 mm.] in length, the ligule forming a thick woolly 

 border to it." This may be an abnormality or his specimen might have included 

 an admixture of something else. 



Dry plains, chiefly on lee side of islands. Originally described from "insulis 

 Sandwicensibus." Panicuiii cinereum was described from "Maui! Haleakala (Prof. 

 Alexander)." 

 Oahu : Koko Head, Mann & Brigham; Forbes 1454, 2415, 2455, 2449. Laie, 



Mann & Brigham. Waialua Mountains. Mann & Brigham 2'/2. 

 Molokai: Kauluwai, Rock 8704; Ka Lae o Ka Laau, Rock 2545. 

 Lanai: G. C. Munro, March 31, 1914; Forbes 150; ]\Iiki, G. C. Munro, December, 



1916; west end of island, Hitchcock 147 19; Nahua, G. C. Munro, 



December, 1916. 

 Maui : Sand hills, East Maui. Wilkes Expl. Exped. 

 Hawaii : \\'ithout locality, Mann & Brigham. 



[ 87 ] 



