Hitchcock — Tlic Grasses of Hazcaii 175 



long, villous on the margins ; sterile lemma as long as the spikelet, about 5-nerved, the lateral 

 nerves villous; fertile lemma as long as the spikelet, pale (fig. 62). 



This species differs from S. sangninalis in the erect racemes and the shorter 



glumes. 



A weed in shady moist rich soil ; introduced. Originally described from 



Hawaii and the Marquesas Islands ("Inss. Sandw. et Marchion."). 



Kauai: Kaloko Reservoir, Forbes 582. Olokele Gulch, Hitchcock 15257. 



Oahu: Alakiki, Heller 1972. Honolulu, Hitchcock 13735. Mt. Tantalus, Hitch- 

 cock 13862. 



Hawaii: Hilo, Hitchcock 14190; Newell in 1917. Kukuihaele, Rock 4545. South- 

 east coast of Puna, Wilkes Expl. Exped. (Gray Herbarium. In this speci- 

 men the sheaths are glabrous or A'ery sparsely beset with papillae.) 



4. Syntherisma sanguinalis(L.) Dulac, Fl. Haut. Pyr. yy. 1867. 



Panicinn saiigitiiialc L. Sp. PI. 57. 1753. 



Digitaria sanguinalis Scop. Fl. Carn. ed. 2. i -.^2. 1772. 



Culms visually decumbent-spreading, often rooting at the nodes, as much as i meter long, 

 glabrous : sheaths, at least the lower, ])apillose-hispid ; ligule a short membrane : blades flat, lax. 

 5 to 15 cm. long', 5 to 10 mm. wide, scabrous, more or less pilose at base; racemes several, 

 mostly 3 to 10, rarely 2, digitate or with i or 2 fascicles below the summit, 3 to 15 cm. long, 

 more or less spreading at maturity ; rachis winged, the green wings about as broad as the 

 whitish center, scabrous on the margins ; spikelets 3 mm. long, lanceolate, acute ; first glume 

 evident, triangular-acute, about 0.5 mm. long; second glume narrow, 3-nerved, about two-thirds 

 as long as the spikelet, prominently villous on the margins and often also on the internerves : 

 sterile lemma as long as the spikelet, 5 to 7-nerved. usually 3 nerves on the flat face of the 

 spikelet, the marginal nerves more or less silky-villous, the hairs appressed at first, often 

 spreading and prominent at maturity; fertile lemma pale, acute (fig. 64). 



A weed in fields and waste places ; introduced. Originally described from 

 Europe. 



Kauai : Lihue, Forbes 466. 

 Oahu: Honolulu, Forbes 1714; Hitchcock 13683. Slopes of Kaala, Forbes in 



1912. Pauoa, Heller 2320. 

 Hawaii: Hilo, Hitchcock 14191 ; Newell in 1917. Without locality, Mann & 



Brigham. 



5. Syntherisma debilis (Desf.) Skeels, U. S. Dept. .\gr. Bur. PI. Ind. Bull. 261:30. 1912. 



■Panicum dcbilc Desf. Fl. At!, i -.^g. 1798. 



Digitaria debilis Willd. Enum. Hort. Berol. 91. 1809. 



Culms weak and slender, erect or decumbent at base ; sheaths glabrous or sparsely pilose ; 

 ligule thin, truncate-erose, 2 mm. long; blades flat, lax, scabrous, 5 to 10 cm. long, 2 to 5 mm. 

 wide ; racemes mostly 2 to 4, ascending or spreading, 2 to 3 approximate at the summit and 

 sometimes one a short distance below, 3 to 8 cm. long ; rachis narrow, 0.5 mm. wide, narrowly 

 winged, scabrous; spikelets lanceolate, acute, 3 mm. long; first glume wanting or only about 

 0.2 mm. long ; second glume about half as long as the spikelet, narrow, acute, slightly villous 

 along t'he margin ; sterile lemma as long as the spikelet, about 7-nerved, glabrous ; fertile lemma 

 pale. ; ; ^• 



A weed in waste places ; introduced. Originally described from the Medi- 

 terranean region. 



[77I 



