Hit ell cock — Tlic Grasses of Hazvaii iii 



plant, which was collected at Tahiti in Wilkes's Expedition." From this it is not 

 clear who collected the Hawaiian specimen. In the United States National Her- 

 barium is a specimen ( lea^'es only) collected bv the Wilkes Expedition at Sandal- 

 wood Bay, Fiji Islands. Hillebrand mentions a small bamboo, without flowers, 

 which he refers to this species. The species was originally described from Nuku- 

 hiwa, an island of the ^Marquesas group. 

 Oahu : Kahauiki A^alley, Forbes 1191. 

 I\Iaui : Xahiku, Rock in 191 1. 

 Hawaii: Hilo, Newell in 1917 — "the wild-growing kind.'" 



Baiiibos -i'ulgaris Schrad. : Weiidl. Coll. PI. 2:26. pi. 47. 1810, the common bamboo, is 

 frequently cultivated and may become established. 



2. BROMUS L. 



Spikelets several to many-flowered, the rachilla disarticulating above the glumes and 

 between the florets ; glumes unequal, acute, the first i to 3 nerved, the second commonly 

 3 to 5-nerved : lemmas convex on the back or keeled, 5 to 9-nerved. 2-toothed at the apex, 

 awnless or usuall}' awned from between the teeth ; palea usually shorter than the lemma. 

 Annual or perennial, low or rather tall grasses, with closed sheaths, flat blades, and open or 

 contracted panicles of large spikelets. 



The species in the Hawaiian islands are all introduced annual weeds, at 

 present not common, but may in the future spread rapidly in the drier parts of the 

 islands. 



Spikelets strongly flattened; lemmas acuminate or short-awned 1. B. unioloides. 



Spikelets not strongly flattened : lemmas long-awned. 



Panicle contracted, erect, oblong : lemmas pubescent. 



Awns straight; hairs of lemma straight and appressed 2. B. hordeaceus. 



Awns bent ; hairs of lemma spreading and more or less flexuous 3. B. molliformis. 



Panicle open ; lemmas glabrous or scabrous. 



Awns less than i cm. long 4. B. racemosus. 



Awns more than 2 cm. long 5. B. rigidus gussonei. 



I. Bromus unioloides H. B. K. Xov. Gen. & Sp. 1:151. 1816. 



Culms 50 to 100 cm. tall: sheaths pilose; blades narrow, scabrous or pilose; panicle 

 open, 20 to 40 cm. long: spikelets compressed, 2 to 3 cm. long, 5 to 9 mm. wide; glumes 

 glabrous, the first 5-nerved. 7 to 10 mm. long, the second 7-nerved, 10 to 12 mm. long: lemmas 

 subcoriaceous, glabrous or scabrous, compressed and keeled, several-nerved, 12 to 15 mm. long, 

 gradually acuminate or extending into an awn as much as 2 mm. long. 



A weed in pastures and open ground; introduced. Native country not 

 certainly known, but probably the Andes. Now distributed from Chile to southern 

 United States. Originally described from Ecuador. This species is cultivated 

 occasionally in the southern United States as a forage plant under the name of 

 rescue grass or Schrader's brome grass. It was probably introduced in the 

 Hawaiian islands for trial as a pasture grass on the ranches of the drier parts of 

 the islands. 

 Alolokai : Central part, 3000 feet, Hitchcock 15 156. 



[13] 



