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H ab. Strait of Magalhaens ; P o rt Famine, Capt. King ; Hermite Island, on sandy beaches near the
sea, J . D. H . Falkland Islands, most abundant, B ’ UrviUe, J . B . H.
In the first part of this work I have given the geographical range of the Trisetum subspieatum, 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, like many common to the opposite temperate zones, has availed
itself of the dhect communication afibrded by the Andes of the American continent for migrating from the
Northern to the Southem Hemisphere. Its great abundance iu the New World and especiaUy in the extreme South
of America, coupled with its rarity in the southem 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.
1 0 . AYENA, L .
1. Avena leptmtachys. Hook, fib; glaberrima, nitida, panicula graciUima flexuosa nutante ramis
breviusculis subverticillatis capillaribus paucifloris, glumis inæquabbus inferiore flosculo a breviore, palea
inferiore lanceolata basi barbata bicuspidata inter segmenta aristata, arista gracib reflexa locusta bis longiore,
culmis gracibbus, fobis planis elongatis.
H ab. Strait of Magalhaens ; Port Pamine, Capt. King.
Culmus exemplare incompleto pedalis, gracilis, erectus, debilis, foliis vaginatus, nitens. Folia caubna longe
vaginantia ; vagina teres, striata, 5-unc. louga ; Ugula membranacea, ovata, fimbriata ; lamina 6- 8-poDicaris, A unc.
lata, flaccida, membranacea, striata, Fanicula 6 unc. longa ; ramis capillaribus, 1-uuciabbus, glaberrimis. Locusta:
A uno. longæ,biflores; flosculis pedicellatis; superiore longius pedicellato, setula ciliata aneto. Gluma ovato-
lanceolatæ, acuminatæ, glaberrimæ; inferiore .^-minore, 1-nervi ; superiore 3-nervi. Palea inferior lanceolata,
puberula, 1-neiwis, nervo dorso scaberulo ; superior brevior. apice bicuspidata. Squamulæ 2, oblongæ, laceræ.
Ovarium obovatum, breviter stipitatum, apice barbatum ; stybs laterabbus, basi panlo discretis.
A very elegant species, of wEich I regret Laving seen but one cubn, whicli wants the rooting portion. It is
nearly aUied to the United States Avena palustris, Mich. ; from which it may readily be distinguished by the smaber
locustæ, more exserted florets, and unequal glumes.
1 1 . POA, L .
1. P oa scaberula, Hook, fil.; erecta, gracibs, scabrida, panicula subsecunda coarctata densiflora, glumis
•3-floris subæqualibus 1-nervbs puberulis dorso scabridis, floscubs pubescentibus basi lanatis breviter
pedicebatis, palea inferiore subcarinata 3-nervi, nervis laterabbus tenuissimis inconspiouis, carina dorso
superne scabrida infeme cibato-plumosa, superiore a breviore apice 2-deutata, fobis bneari-setaceis scaberubs
culmo gracib erecto scabrido multoties brevioribus.
H ab. Strait of Magabiaens ; Po rt Famine, Capt. King.
Radix fibrosa. Culmi erecti v, basi ascendentes, pedales et ultra, graciles, striati, scaberuli. Folia pauca,
longe vaginantia ; vagina scaberula, profunde striata; la»;«! 3 -5 -uncialis, setacea, involuta; Ugula ovata, obtnsa,
membranacea. Panicula 2-3-poUioaris, coarctata, basi interrupta, unilnterabter secunda, a _ j unc. lata. Locustæ
parvæ, A une. longæ, puberulæ, pui'piueo-piotæ, late ovatæ, sub 3-flores. Glumæ virescentes, compressæ.
locusta breviores, acutæ. Flosculi basi longe aracbnoideo-lanati. FaZca superior acuta, membranaceo-margi-
nata. Squamulæ parvæ, ovatæ, acuminatæ.
I know of no species with which the present can be confounded. The scabridity, coarctate panicle, dense
locustæ, and other characters at once distinguish it from its congeners.
2. P o a nemoralis, Linn., Sp. P L 102. Engl. Bo t. 1 .1265.
H a b . Strait of Magalhaens ; P o rt Gregory, Capjt. King.
Most distinctly the P. nemoralis of Ben-Lawers, whose flowers are slightly webbed at the
a Eocky-Moimtain plant, but has not hitherio been fouud on the Cordillera of South America.
base. I t is also
3. P o A p ra te n s is ,U im ., S p .P L 99. B ank s et Sol. in Mus. Banhs. Engl. Bo t. 1.1912,. P . compressa,
i/ar. virescens, B ’ Urv. in Mini. Soc. U n n . Faris, vol. iv. p. 600. P . alpina, Brongn. in Buperrey, Toy. Bot.
p . 4 4 , non L in n .
Var. 1, bgula fobi superioris oblonga, panicula laxa, glumis 4-floris paleisque angustioribus.
Var. 2, panicula subcoarctata, glumis latioribus brevioribusque 2-8-floris.
Var. 3, panicula effusa, glumis 3-5-floris.
Var. 4, panicula coarctata, glumis sub 4-floris paleisque angustioribus, floscubs basi fere nudis.
Var. 5, 6 -unciabs, locustis minoribus 2-3-floris.
H a b . Strait of MagaUiaens; P o rt Pamine, Capt. King [pars. 1, 3, and 4), Good Success Bay, Banhs
and Solander; Falkland Islands, abundant (vars. 2 and 5).
I cannot ascertain the identity of tliis species with the European P. pratensis, so satisfactorily as that of the
former with P. nemoralis ; nevertheless, the more the present grass is studied, the more difficult it appears to
detect specific characters. The five varieties enumerated, appear all to belong to one plant ; except, perhaps, the
var. 1, in which the ligula of the upper leaf is oblong as in the Em-opean P . alpina, to a North American state of
which I should have referred that variety, had its florets not been webbed, a character, wliich, though of trilling
importance, (perhaps even less'than the form of the ligula) does not exist in any of the numerous individuals of
P . alpina that I have examined.
In British, and, indeed, in European examples of P . alpina, we are accustomed to see a small panicle of
short and broad flowers, with a diflerent aspect to that oî P . pratensis ; hut North American individuals are subject
to great vai-iations in the size and outline of the panicle, so great that without connecting forms it would be very
difficult to recognize them. Mr. Watson is equally persuaded w-ith myself of the close affinity between this Antarctic
Poa and P. alpina, though neither of us can adduce a tangible character beyond the webbed florets
to separate the plants of Arctic aud Antarctic America. I have not seen any of these species from the intervening
Cordillera, a circumstance of little importance, the Gramineæ of these regions having been veiy much neglected by
all collectors since the period of the travels of the illustrious Humboldt.
12 , TRIO D IA, B r .
1. Teiodia Aeri/ae&KiM, Hook, fil,; parvula, dense cæspitosa, panicula simpbci paucifiora scaberula,
glumis inæqualibus acutis 3-nerviis 2-floi-is, floscubs breviter pediceUatis glumis inclusis basi nudis, paleis
æquilongis iuferiore dorso convexa obscm-e 5-nervi, superiore æquilonga bifida, folds setaceis, culmis brevibus
basi fobosis. (Ta b . C X X X V III. sub nomine Poæ).
H a b . Kerguelen’s Land ; rocky places, a t an elevation of 3 0 0 -1 2 0 0 feet.
Gramen parviilum, dense cæspitosum, 2-4-miciale. Folia glaberrima, brevia, recta sed vix rigida, setacea,
mai-giiiibiis involutis; lamina vix pollicaris vagina tumida longior; Ugula ovata, subacuta. Panicula seu
racemus simplex, 3-5 lin. longus, erectus ; rachi flexuosa, scaberula. L-ocustæ pedunculatæ, lin. longæ,
ovato-oblongæ, virides. Glumæ margine dorso nervisque scaberulæ, concavæ, coriaceo-cbai-taceæ ; superior longior,
paulo angnstioi- ; inferior oblique acuminata. Flosculi glumas vix superantes, inferior subsessilis, superior brevitci