Hitchcock — The Grasses of Hazi'aii 119 



panicle immature ; spikelets few-flowered, the glumes acuminate, almost bristle-pointed, a little 

 unequal, the second about 4 mm. long ; lemmas copiously webbed at base, the keel and marginal 

 nerves villous, the intermediate nerves rather obscure. 



Siphonocoleus sect. nov. 



Sheaths closed ; ligule united at the edges forming a tube, a somewhat thickened auricle 

 or tooth extending upwards into the ligule from the sinus of the sheath ; culms flattened, solid. 

 Type Poa siplwiioglossa Hack. Includes three species from the Hawaiian islands. (Siphon, 

 tube, col ens, sheath.) 



4. Poa mannii ]\Iunro: Hillebr. Fl. Haw. Isl. 526. 1888. 



Plants perennial without rhizomes ; culms tufted, flattened, wiry, glabrous, striate, some- 

 what glaucous, the internodes solid ; sheaths gla1)rous, striate, mostly shorter than the internodes, 

 closed nearly or quite to the mouth, an auricle continued upward from the sinus for 2 to 3 mm. ; 

 ligule membranaceous, about 0.5 mm. long, the margin fimbriate, the divisions i to 3 mm. long-; 

 blades flat, lax, as much as 15 cm. long, mostly shorter, 2 to 4 mm. wide, acuminate, glabrous 

 beneath, scabrous on the upper surface, somewhat cla.sping at the base, the lower finally decidu- 

 ous from the sheaths ; panicle ovate, mostly less than 5 cm. long, the lower branches about 3, 

 ascending, bearing above the middle a cluster of spikelets ; spikelets mostly 4 or 5-flowered, flat- 

 tened, about 5 mm. long, pale, greenish or tawny, the rachilla nearly glabrous ; glumes glabrous, 

 narrow, acuminate, slightl}' unequal, about 3 mm. long, 3-nerved, the first in some spikelets 

 faintly nerved; lemmas 3 to 4 mm. long, acute, more or less webbed at base, the keel and lateral 

 nerves villous on the lower part, the intermediate nerves not very prominent (fig". 8). 



Wet cliffs. Originally described from "Kauai, ^^'ain^ea (]\I. & B. 274)." 

 Kauai: Olokele Gulch, Hitchcock 15229; Faurie 1306. Waimea, 2000-3000 feet, 



Mann & Brighani 274 (the type collection of Poa mannii Munro). 



The iiidigenous species of Poa are not sufficiently known. One of the speci- 

 mens cited (Faurie 1306) has a few hairs in the a.xils of some of the branches of 

 the inflorescence. 



5. Poa siphonoglossa Hack. Repert. Nov. Sp. Fedde 11:24. 1912. 



Plants perennial without creeping rhizomes ; culms .solid, flattened, smooth, striate, tufted, 

 the tufts often large, depending from banks in long masses as much as 4 meters long, the old 

 culms naked and rushlike, bearing bladeless sheaths, the internodes much elongate, as much as 

 65 cm. long; sheaths glabrous, closed to the mouth, shorter than the internodes, on the older 

 culms much shorter; ligule membranaceous, more or less dentate, 2 to 3 mm. long, continuous 

 across the mouth except where ruptured by the splitting of the sheath ; blades flat, lax, mostly 

 less than 10 cm. long, 2 to 3 mm. wide, smooth beneath, scabrous on upper surface, deciduous 

 from the sheaths on the old culms ; panicle ovate, mostly less than 5 cm. long, the lower branches 

 about 5. ascending, the whole panicle rather few-flowered ; spikelets flat, 2 to 5-flowered, 4 to 7 

 mm. long, the rachilla pubescent : glumes narrow, acuminate, glabrous, 3-nerved, a little unequal, 

 the second about 4 mm. long; lemmas narrow, acute, 4 to 5 mm. long, not webby at base, sca1> 

 rous on the keel and marginal nerves, or scabrous-pubescent toward the base, the intermediate 

 nerves rather prominent : palea scabrous-ciliate on the keels, nearly as long as the lemma, 

 2-toothed (fig. 9). 



Shady banks along a ridge. Originally described from Kauai "prope 

 Waimea, 1000 m. s. m. et prope Holokele, Mart. 1910, leg. U. Faurie (no. 1305 

 et 1306)." No. 1305 may be taken as the type. 



Kauai: Maulili, near Kaholuamano, Hitchcock 15536, Rock 9018. 



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