of the. Galapagos Archipelago. 1 73 



Gramen rigidum, glaberrlmum, laeve. Radix, ut videtur, vage repens. Culmi prostrati, 

 elongati, nudi, geniculati, pluri-nodosi, ad nodos dichotome ramosi, teretes, glaberrimi, 

 duri; nodis tumidis. Rami ex ima basi curvata adscendentes, 4-6-pedale8, deinde 

 erecti, rigidi, apicem versus foliosi, internodiis sub 2-3-uncialibus. Vaginae cylin- 

 draccfE, internodiis ^ breviores, striatae, ad basin fissae, marginibus mox involutis, 

 3-4 una. longae, 2 lin. latae. Spies solitariae et binas, terminales vel axillares, filiformes, 

 foHis subbreviores. Rachis undulata, sub lente pubescens. Spiculae alternae, subses- 

 siles, distichae? \ lin. longae, glaberrimae, basi setis brevibus scabridis suffultae. Gluma 

 inferior minima, orbiculari-ovata, 3-nervis, paleis ^ brevior, ad apicem acuminatum 

 eroso-ciliata. Floris inferioris palea ovato-lanceolata, acuminata, chartacea, 5-nervis, 

 glabra ; floris superioris palea inferior subsimilis, concava, 3-nervis ; superior subaequi- 

 longa, 2-nervis. Squamulae 2, obovato-quadratae, truncatae. Stamina 3. Ovarium 

 minimum, ovatum ; stylis 2 elongatis ; stigmatibus plumosis. Caryopsis late ovata, 

 obtusa. 



Apparently a widely-creeping and probably binding littoral grass. The 

 upper palea of the fertile flower is decidedly 2-nerved. 



45. EuTRiANA piLosA, Hook. JiL; spicis horizontalibus, locustis sub 4 con- 

 fertis 2-floris, floris inferioris palea inferiore 3-nervi ad apicem trifida 

 segmentis subulato-aristatis ; superiore bifida bicarinata carinis minute 

 scabridis, floris superioris palea 1 (nempe exteriore) bifida inter segmenta 

 ciliata long^ aristata nervis lateralibus ultra segmenta in aristas breves 

 productis, foliis vaginisque supra laxfe patentim pilosis. 



Hab. Albemarle Island, Mr. Macrae. 



Gramen erectum, gracile, Ig-pedale. Radix fibrosa. Culmi fasciculati, e basi ramosi, 

 erecti, vel geniculati et adscendentes, ter quaterve nodosi, teretes, glaberrimi, striati, 

 foliosi, nodis contractis brunneis. Vaginae cylindraceae, sulcatae, inferne glabrae, su- 

 perne parce pilosae, pilis basi minute tuberculatis, infra medium interdum ad basin 

 fissae, 2-3 unc. longae, ad orem penicillato-barbatae. Folia plana, lineari-lanceolata, 

 divaricata, attenuata, acuminata, pilosa, pilis laxis moUibus patulis, 2-3 unc. longa, 

 1^ lin. lata. Spicae horizontales, rariiis suberectae, brevi-pedunculatae, secundae, \ unc. 

 longae ; rachis compressa, ultra locustas in laminam subulatam ad apicem bifidam pro- 

 ducta. Locustae in quavis spica sub 4, fasciculatae, biflorae; flos superior imperfec- 

 tus. Glumse 2, acuminatae, 1-nerves, nervo lato dorso scabrido; superior apice vix 

 bifida, subcarinata ; inferior minor basi subremota. Flos inferior hermaphroditus, bre- 

 viter pedicellatus. Paleae 2, inferior ovato-lanceolata, dorso superne 3-nervis, nervo 



2 A 2 



