Hit ell cock — TJic Grasses of Hazi'aii 139 



^Vheat (Triticinii acsth'inii L. ; T. vnlgarc Vill. ; 7\ satk'tim Lam.) was found as a waif in 

 the experimental fields at Schofield Barracks (Hitchcock 13964, 13965, 13966) and may be 

 found in Avaste places. Spikelets 2 to 5-flowered, solitary, sessile, placed flatwise at each joint of 

 a continuous rachis, forming a dense spike; glumes rigid, broad, the apex abruptly mucronate 

 or toothed ; lemmas keeled, ending in a short point or a long awn ; plants annual : a pair of 

 appendages or small auricles at the junction of the sheath and blade. 



Rye (Sccalc cerealc L.) was also found as a waif at Schofield Barracks (Hitchcock 

 13962). Plants taller than wheat, the spike nodding; spikelets 2-flowered, solitary and sessile, 

 placed flatwise against the continuous rachis : glumes narrow, rigid, acuminate or subulate- 

 pointed ; lemmas broader, sharply keeled, 5-nerved, ciliate on the keel and exposed margins, taper- 



uig into a long awn. 



9. HORDEUM L. 



Spikelets i-flowered, 3 (sometimes 2) together at each node of the articulate rachis (con- 

 tinuous in Hordeum vulgave), the back of the lemma turned from the rachis, the middle one 

 sessile or subsessile, the lateral ones pediceled ; rachilla disarticulating above the glumes and, in 

 the central spikelet, prolonged behind the palea as a bristle and in some spikelets bearing a rudi- 

 mentary floret ; lateral spikelets commonly imperfect, in some species reduced to bristles ; glumes 

 narrow, often subulate and awned, rigid, standing in front of the spikelet; lemmas rounded on 

 the back, 5-nerved, as a rule obscurely so, tapering into a usually long awn. Annual or peren- 

 nial low or rather tall grasses, with flat blades and dense terminal spikes. 



I. Hordeum murinum L. Sp. PL 85. 1753. Wild barlby. 



Plants annual ; culms bushy-branched, spreading ; sheaths and blades smooth ; spike 5 to 7 

 cm. long, often partially enclosed in the uppermost inflated sheath ; glumes of the central spikelet 

 narrowly spindle-form, 3-nerved, long-ciliate on both margins, the nerves scabrous, the awn 

 about 2.5 cm. long; glumes of lateral spikelets unlike, the inner similar to the central, the outer 

 setaceous, not ciliate ; lemmas all broad, 8 to 10 mm. long, the awns somewhat exceeding those 

 of the glumes (fig. 24). 



Weed in pastures ; introduced. Originally described from Europe. 

 Oahu: Schofield Barracks, Hitchcock 13920. 

 Hawaii: Makahalau, Rock 3198. Wainiea, Hitchcock 14348. 



Barley {Hordeum vulgare L.) as a waif in the experimental fields was found at Schofield 

 Barracks (Hitchcock 13963).- Plants annual with flat blades and dense terminal spikes resemb- 

 ling those of bearded wheat but with longer awns ; auricles at base of blade larger than in wheat 

 or rye ; spikelets in groups of three, all three fertile in 4 and 6-rowed barley, the kind usually 

 grown; grain (except in naked barley) permanently enclosed in the spikelet. 



10. LOLIUM L. 



Spikelets several-flowered, solitary and sessile, placed edgewise to the continuous rachis, 

 one edge fitting to the alternate concavities, the rachilla disarticulating above the glumes and 

 between the florets; first glume wanting (except on the terminal spikelet), the second outward, 

 strongly 3 to 5-nerved, equaling or exceeding the second floret; lemmas rounded on the back, 

 5 to 7-nerved, obtuse, acute, or awned. Annuals or perennials, with flat blades and simple ter- 

 minal flat spikes. 



Plants annual; glume as long as or longer than the spikelet I. L. temulentum. 



Plants perennial ; glume shorter than the spikelet 2. L. multiflorum. 



I. Lolium temulentum L. Sp. PI. 83. 1753. 



Plants annual; culins 60 to 80 cm. tall; spike stout and strict, 15 to 20 cm. long; glume 

 about 2.5 cm. long, as long as or longer than the 5 to 7-flowered s-pikelet, firm, jxiinted ; lemmas 

 as much as 8 mm. long, obtuse, the awn wanting or as much as 8 mm. long (fig. 25). 



[41 J 



