Falklands, etc.] FLORA ANTARCTICA. 377 



5. Aiba Antarctica, Hook.; panicula efi'usissima ramis fasciculatis capillaribus pedicellisque elongatis, 

 spiculis lanceolatis 1— 2-tloris setiilaque flosculi secimdi tertiive auctis, flosculis puberulis pedicellatis basi 

 sericeis, palea inferiore profunde bifida basi aristata, arista glumas superante, cubno brevi, foliis subulatis 

 longe vaginantibus. A. Antarctica, Hook. Ic. Plant, t. 150. (Tab. CXXXIII.) 



Hab. Hermite Island, Cape Horn, tbe Falkland Islands, and Kerguelen's Land, abundantly, J.B.H.; 

 New Soutb Shetlands, Br. Eights. 



Planta pha?noganiica ante omnia Antarctica. Culmi dense ca?spitosi, breves, 1-3-unciales, erecti procumben- 

 tesve, foliosi. Folia glaberrima, herbacea, longe vaginantia ; vagina \-\\ unc. longa, teres, striata ; ligula 

 linearis, A unc. longa; lamina anguste lineari-subulata, marginibus involutis, vaginae aequilonga v. longior. 

 Panicula pro planta maxima, 4-6 unc. longa, effusa, 3-6 unc. lata, v. ob ramos appressos angustior ; ramis 1-5 unc. 

 longis pedicellisque scaberulis, capillaribus. Spiculis angusta?, fere \ unc. longa?, 1-2 flores, uniflores semper 

 biflores saepissirne pedicello ciUato floris alterius aucta?. Ghana lanceolata?, carina scabrida margiivibus sub lente 

 ciliatis, apicibus acutis, flosculis pedicellatis inclusis bis longiores. Palea inferior ciliata, oblongo-lanceolata, 

 scarioso-membranacea, bifida v. fere bicuspidata, sinu quadrato bidentato, dorso basi aristata ; arista recta, 

 scaberula, paulo ultra glumas exserta. Stamina exserta, antberis brevibus. Squamula oblique ovata? acuminata;. 

 Ovarium breviter stipitatum, stybs basi discretis divaricatis. 



Tbis elegant grass, appropriately named A. Antarctica, attains a higber southern latitude than any other 

 flowering plant, being the only phaenogamic species that inhabits the South Shetland Islands. Kerguelen's Land in 

 latitude 48° is its northern luuit; but that Island being situated in a longitude where the rigour of the Antarctic 

 climate extends further north than in any other, this grass is even there more typical of the frigid zone than the 

 latitude would indicate, and always seeks the most sheltered places. In the Falkland Islands again, the most 

 temperate region it inhabits, it invariably avoids shelter, bemg found chiefly in open marshy places near the sea, 

 fully exposed to the violence of the winds. 



Plate CXXXIII. Fig. 1, two locusts? and portion of panicle ; fig. 2, a floret from the same ; fig. 3, squamula ; 

 fig. 4, single-flowered locusta ; fig. 5, floret from the same : — all magnified. 



6. AiBAparmla, Hook. fil. ; caespitosa, puberula v. glabrata, panicula erecta contracta subsimpbci 

 pauciflora rarnis brevibus locustisque erectis, glumis lanceolatis acuminatis flosculis pedicellatis triplo lon- 

 gioribus, palea inferiore late ovata basi barbata apice bifida inter segmentos acutos bidentata dorso supra 

 basin aristata, arista geniculata glumas vix excedente, foliis setaceis culino brevioribus. 



Hab. Hermite Island, Cape Horn ; rocks near tbe mountain tops, /. B. H. 



Gramm 3-5-unciale, foliosum, dense ceespitosum, rigidiusculum. Culmi erecti, basi fibrosi et pluries 

 divisi, foliis perpluriniis vaginati. Folia 2 unc. longa, stricta, erecta, anguste subulata, glabrata v. pilis patidis 

 puberula, subcoriacea, marginibus involutis ; vagina latiuscula, membranacea ; ligula valde elongata, scariosa, 

 linearis, acuminata. Panicula l-l-i-uncialis, stricta, erecta j ramis paucis, brevibus, 1-floris, panicula? appressis. 

 Locusta a unc. longa;. Gluma a?quales, glabriuscula?. Flosculorum pedicelli sericeo-barbati ; flosculi superioris 

 palea superior setula aucta. Squamula ovata?, acuminata?. Ovarium obtusum, stylis discretis, laterabbus. 



A remarkably distinct little species, most nearly allied to A. Antarctica, but distinct in the foliage, the very 

 different panicle, and shorter florets. 



9. TRISETUM, Kunth. 



1. Teisetom subspicatum, Beauv., Agrost. p. 88. Ft. Antarct. Pt. 1. p. 97. T. andinum, Bent A. 

 Plant. Hartweg. p. 2G1. n. 1449. 



4 Q 



