ijo Memoirs Invnicc P. F>ishop Miisciiin 



Weed in tield; introduced. Originally described from Europe. 

 Oahu: .Schofield Barracks, Hitchcock 13915. 

 Maui: Haleakala, Hitchcock 14988. 



Rice ( Orvru sutkv L. Sp. I'l. 333. 1753) is cultivated an<l is occasionally found QTowinsj 

 spontaneously in fields and ditches. 



ArundiiicUa ai;;rostoidcs Trin. is included douhtfu'ly In- llillebrand'- l)ut should he omit- 

 ted as the locality "Oahu" is probably an error. 



,^2. VALOTA Adans. 



Spikelets lanceolate, in pairs, short-pediceled. in two rows along one side of a narrow 

 racliis : first glume minute, glalirous : second glume and sterile lemma alx)iit as long as the fruit, 

 3 to 5 nerved, copiously silky: fertile lemma cartilaginous, lanceolate, acuminate, usually brown, 

 the flat white h\aline margins broad. Perennial grasses, the slender racemes erect or nearly so, 

 aggregate along the upper part of the main axis, forming a pale or brownish woolly panicle. 



I. Valota insularis ( L. ) Chase, Proc. Biol. Soc. Washington 19:188. 1906. Sour gr.^ss. 



Andropogoii insularis L. Syst. Xat. ed. 10. 2:1304. 1759. 



Paiiiciim leucophacum H. B. K. Nov. Gen. & Sp. i :97. 1816. 



Culms erect, or decumbent at base, about i meter tall, glabrous ; sheaths sparsely hirsute 

 or glabrous: blades flat, elongate, 5 to 10 mm. wide; panicle 15 to 20 cm. long, nodding, the 

 numerous racemes about 10 cm. long: spikelets narrow, about 4 mm. long, appressed along the 

 rachis; second glume and sterile lemma obscured by the long silky tawny hairs: fruit acuminate, 

 3 mm. long (fig. 60). 



Along roadsides and in waste places, infrequent: introduced. Originally 

 described from Jamaica. 

 Oahu: Honolulu, Hitchcock 13841. 



},},. SYNTHERISMA Walt. 

 { Digitaria Hall. ) 



Spikelets solitary or in twos or threes, subsessile or short-pediceled, alternate in two rows 

 on one side of a three-angled winged or wingless rachis ; spikelets lanceolate or elliptic, plano- 

 convex : first glume minute or wanting : second glume equaling the sterile lemma or shorter ; 

 fertile lemma cartilaginous, the ■hyaline margins pale. Annual or sometimes perennial, erect or 

 prostrate grasses, the slender racemes digitate or somewhat scattered, but aggregate at the 

 suinmit of the culms. Our species are all animals. 

 Si)ikelets 1.5 mm. long, obtuse. 



Stems creeping, the sterile shoots with short broad blades I to 2 cm. long., i. S. longiflora. 



Stems erect, or decumbent at base: blades all linear 2. S. chinensis. 



Spikelets 3 mm. long, acute. 



Racemes several, erect, remaining close together even at maturity 3. S. pruriens 



Racemes ascending or spreading at maturity. 



First glume evident, 0.5 mm. long; second glume alxiut two-thirds as long as the 



spikelet, villous on the margins 4 S. sanguinalis. 



First glume wanting or only alx)ut 0.2 nmi. long; second glume usually not over half 

 as long as the spikelet. 

 Second glume acute, about half as long as the spikelet, slightly villous; racemes 



2 to 4 5. S. debilis. 



Second glume obtuse, less than one-fourth as long as the spikelet ; racemes several 



6. S. microbachne. 



"Op. cit.. p. 514. 



