/ lilclicock — The Ci'rasscs of Ilai^'aii 129 



Escaped from tlic L'liitcd States Agricultural Experiment Station grounds; 

 introduced from Africa. In the original description no locality is cited. 

 Oahu: Honolulu, Ililchcock 14123. 



6. Eragrostis atropioides llillchr. \'\. flaw. I>1. 5.^. 1888. 



Plants perennial, in loose tnfts with short liard scaly creepini,-- rhizomes as nuich as 7 cm. 

 lone:: culms erect, hard, jjlabrons, slif^ditly scabrous below the panicle, i to 1.5 meters tall; 

 sheaths ijlabrous, pilose on the margins especially in the sterile shoots, pilose at the throat ; ligule 

 a pilose ridge, the hairs 5 mm. long; blades elongate, 30 to 40 cm. long, 4 to 6 mm. wide, 

 glabrous beneath, scabrous on the upper surface ; panicle erect, narrow, contracted but scarcely 

 spikelike. 25 to 50 cm. long, 2 to 4 cm. wide, the branches appressed, several at a node, some 

 short or the spikelets sessile, others as much as 10 cm. long and naked at the base. Spikelets 

 linear, many-flowered, as much as 2.5 cm. long, the rachilla glabrous ; glumes a little uneciual, 

 T, to 4 mm. long, acuminate, more or less scabrous on the keel ; lemmas glabrous, obtuse and 

 erose at the summit, about 2 mm. long, pale or purplish, rather closely imbricate; palea persist- 

 ent, alxnit as long as the lemma, obtuse, minutely ciliate on the keels ffig. 15). 



Sandy plain between Mauna Kea and Mauna Loa, about 4000 feet. Origi- 

 nally described from "East Maui? (label lost), probably growing in wet places". 

 Hillebrand also describes two varieties !i and 7), one from "TTawaii or Maui," tlie 

 other from "Oahu." 



Hawaii: West of Humuula Sheep Station on road to W'aimea, Hitchcock 14445, 

 14459. P"u Waawaa, Hitchcock 14493, 14495- Mauna Kea, above Wai- 

 kii, Rock 8405. Parker's Ranch. Smith in 1902. Mauna Loa, Wilkes Expl. 

 Exped. 



Without locality: Hillebrand. 



A specimen in the dray Herbarium collected in the "]\Its. East Maui" by the 



Wilkes Expedition appears to be this species. 



7. Eragrostis mauiensis sp. nov. 



Plants perennial: culms erect, cespitose, glabrous, 30 to 40 cm. tall: sheaths glabrous, 

 slightly villous at the throat; ligule a ciliate membrane less than 0.5 mm. long; blades mostly 

 involute, 10 to 15 cm. long, i to 2 mm. wide, glabrous on the lower surface, slightly villous on 

 the upper surface near the base, tapering to a fine point ; panicle oblong, open, about 30 cm. long 

 and 5 to 7 cm. wide, the branches slender, stiffly ascending, as much as 10 cm. long, scabrous, 

 villous in the axils, the ultimate branchlets or pedicels stitfly ascending, mostly longer than the 

 spikelets ; spikelets 7 to 10 mm. long, mostly 8 to lo-flowered, brownish yellow ; glumes nearly 

 equal, acuminate, scabrous on the keel, i-nerved, the first a little shorter and narrower, about 

 2 mm. long, about as long as the lower lemma, almost awn-pointed : lemmas tapering to an 

 obtuse ]3oint, 2 to 2.5 mm. long, obscurely scabrous on the keel near the apex, rounded on the 

 back or keeled toward summit, faintly 3-nerved, imbricate and hiding the rachis, glabrous ; palea 

 a little shorter than the lemma, closely and minutely ciliate ; grain oblong, dark brown, finely 

 alveolate, 1.2 mm. king (fig. 16). 



Type in the Gray Herbarium of Harvard University, collected on sandhills 

 at Wailuku, Maui, Hawaiian islands, by the \\^ilkes Exploring Expedition. 



This species resembles Eragrostis ellioftii S. Wats, in the slender, stiffly 

 ascending branches and pedicels, but differs in the shape of the panicle. 



[31 J 



