378 FLOKA ANTARCTICA. [Fuegia, the 



Hab. Strait of Magalhaens ; Port Famine, Capt. King ; Hermite Island, on sandy beaches near the 

 sea, /. D. H. Falkland Islands, most abundant, D' Urville, J. B. R. 



In the first part of this work I have given the geographical range of the Trisetmn subspicatum, when noticing 

 it as a native of Campbell's Island ; at which time I was not aware of any other South American station for it than 

 the Andes of Peru. Since then 1 have seen several specimens collected both in the Cordillera of Columbia and in 

 Mexico, whence it is evident that this plant, bke many common to the opposite temperate zones, has availed 

 itself of the direct communication afforded by the Andes of the American continent for migrating from the 

 Northern to the Southern Hemisphere. Its great abundance in the New World and especially in the extreme South 

 of America, coupled with its rarity in the southern regions of the Old World, where it is only known on the tops 

 of the mountains of Campbell's Island, seem to indicate its having been transmitted from east to west, or against 

 the course of the prevailing winds in the Antarctic regions. 



10. AVENA, L. 



1. Avena leptodaclnjs, Hook, fil.; glaberrima, nitida, panicula gracillima flexuosa nutante ramis 

 breviusculis subverticillatis capillaribus paucifloris, glurnis inaequalibus inferiore flosculo \ breviore, palea 

 inferiore lanceolata basi barbata bicuspidata inter segmenta aristata, arista gracili reflexa locusta bis longiore, 

 culmis gracilibus, foliis plants elongatis. 



Hab. Strait of Magalhaens ; Port Famine, Capt. King. 



Culmus exemplare inconrpleto pedalis, gracilis, erectus, debilis, foliis vagiuatus, nitens. Folia caulina longe 

 vaginantia ; vagina teres, striata, 5-unc. longa ; ligula membranacea, ovata, fimbriata ; lamina 6-8-pollicaris, % unc. 

 lata, flaccida, membranacea, striata. Panicula 6 unc. longa ; ramis capillaribus, \- 1-uucialibus, glaberrimis. Lo- 

 custa \ unc. longa?, biflores ; flosculis pedieellatis ; superiore longius pedicellato, setula ciliata aucto. Glumes ovato- 

 lanceolatse, acuminata;, glaberrima? ; inferiore -i-miuore, 1-nervi ; superiore 3-nervi. Palea inferior lanceolata, 

 pubenda, 1-nervis, nervo dorso scaberulo ; superior brevior, apice bicuspidata. Squamules 2, oblonga?, lacera?. 

 Ovarium obovatum, breviter stipitatum, apice barbatum ; styhs lateralibus, basi paido discretis. 



A very elegant species, of which I regret having seen but one culm, which wants the rooting portion. It is 

 nearly allied to the United States Avena palustris, Mich. ; from which it may readily be distinguished by the smaller 

 locusta?, more exserted florets, and unequal glumes. 



11. POA, L. 



1. Poa scaberula, Hook, fil.; erecta, gracilis, scabrida, panicula subsecunda coarctata densiflora, glumis 

 3-floris subsequalibus 1-nerviis puberulis dorso scabridis, flosculis pubescentibus basi lanatis breviter 

 pedieellatis, palea inferiore subcarinata 3-nervi, nervis lateralibus tenuissimis inconspicuis, carina dorso 

 superne scabrida inferne ciliato-plumosa, superiore \ breviore apice 2-dentata, foliis lineari-setaceis scaberulis 

 culmo gracili erecto scabrido multoties brevioribus. 



Hab. Strait of Magalhaens ; Port Famine, Cap/. King. 



Radix fibrosa. Culmi erecti v. basi ascendentes, pedales et ultra, graciles, striati, scaberuli. Folia pauca, 

 longe vaginantia; vagina scaberula, profuude striata; lamina 8-5-uncialis, setacea, involuta ; ligula ovata, obtusa, 

 membranacea. Panicula 2-3-pollicaris, coarctata, basi interrupta, unilateraliter secunda, ■J— J unc. lata. Locmtee 

 parvse, \ unc. longa?, pubenda?, purpureo-picta?, late ovata?, sub 3-flores. Glumes virescentes, compressa?, 

 locusta •!• breviores, acuta?. Flosculi basi longe arachnoideo-lanati. Palea superior acuta, membranaceo-margi- 

 nata. Squamules parvEe, ovata?, acuminata?. 



I know of no species with which the present can be confounded. The scabridity, coarctate panicle, dense 

 locusta?, and other characters at once distinguish it from its congeners. 



