194 Memoirs Ucniicc P. Bishop Museum 



Lanai : .Miinro in 1914. 



Maui: Without locality, Jlillebrand in 1858. 



Hawaii- Kanchalia, Forbes 259; Papaalo, Forlies 313, 315a. Kukaiau Ranch, 



Hitchcock 14208, 14251, T4256, 14264. IIualaLai Mountains, Hitchcock 



14518; Mann iS: lirighani 237.'' Huniuula Sliccp Station, Hitchcock 14413; 



W'ainiea, Na Puu o Pclc, Wilkes Expk Exped. 

 Without locahty: Ilillcbrand. 



Dr. Sta])f has kindly sent me a portion of the top of /\iiiicum tcnuifolium 

 Hook. & Arn. collected at "Oahu Bay". The blades are narrow and involute, 

 j^labrous on the under or outer surface, densely pubescent and more or less pilose 

 on the upper surface. 'Phc ])lant is described originally as ijlabrous, the up]K'r 

 surface of the blades not having been investigated. The general aspect and the 

 character of the pubescence place this with the specimens referred by Hillebrand 

 to his variety rhyacophilum. 



Hillebrand's variety tcnuifolium is based upon Panicum toiuifolium Hook. 

 & Arn. but Hillebrand mentions two other specimens besides the type, as follows, 

 "Molokai! pali of Makonalua ; Maui! Haleakala; Oahu (Lay & Collie). In speci- 

 mens from E. Maui a slight imbescence becomes visible on the nodes of the stems 

 and on the leaf-sheaths". Among the specimens sent by Dr. Stapf there are three 

 from Maui collected by Hillebrand labeled respectively, "Haleakala 538", "Makawa 

 E. Maui 64". and "Maui 536". The first one is the common form of his variety 

 rhyacopJiilnm which 1 am referring to Pauicum tcnuifolium Hook. & Arn. The 

 second and third appear to be the same form and may be duplicates. Some of the 

 blades are flat, glabrous, and as much as 5 mm. wide, other blades are involute and 

 finely pubescent. The plants are cespitose, 25 to 30 cm. t ill. These may be the 

 specimens referred to by Hillebrand as having a slight ]nil)cscence. The Haleakala 

 specimen is so evidently pubescent as to appear to be excluded from this reference. 

 Hillebrand's Molokai specimen was kindly sent me from the Berlin Herbarium bv 

 Dr. Diels. This has glabrous blades as much as 5 or 6 mm. wide, flat below and 

 involute above. I have referred this to P. ncpJiclophilum as a small form. Pos- 

 sibly these intermediate specimens constitute a distinct species. This can be deter- 

 mined only by more material. 



A specimen in the herbarium of Cornell University, without data, is labeled 

 Panicum nephclopJiilum Gaud. P. tcnuifolium Plook. & Arn. and bears the note 

 "[revised 1885 by Dr. W. Hillebrand]." The blades are narrow and velvety with 

 a fine hirsutulous ])ubescence. 



15. Panicum issachnoides Miinro: Hillebr. Fl. I law. I>1. 301. 1888. 



Panicum concltoidcion Tlillcbr. as synonym under /'. isachnoidcs. 



Plant.s perennial, forming dense tussocks as much as 20 or 30 cm. or more in diameter, 

 repeatedly hranchin.sj. tlie lower jiarts of the culms dying' and the new shoots appearing at the 

 periphery ; culms indefinite in length but the new shoots only a few centimeters long, the leaves 

 closely imbricate ; sheaths striate, more or less pubescent, mostly hidden by the imbricate blades : 

 ligule a very short ciliate membrane 0.5 mm. long; blades horizontally spreading i to 3 cm. 

 lon.g, 5 to 7 mm. wide, conspicuously papillosc-ciliate, flat and firm, oblong-lanceolate, conchoid 

 or spcx')n-shaped, striate, clasiiing at base; panicle narrow ;iiid fcw-tlowered. i to 2 cm. long, 



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