Falklands, etc.] FLOKA ANTARCTICA. 361 



Evidently the European E.palmtris, which is also a native of Patagonia, and very widely diffused throughout 

 the temperate regions of both the northern and southern hemispheres. Hypogynous setae are generally present, 

 though those of my specimens vary in size ; Kunth says, " setae plane abortientes in Scirpo melanostacltyo" and 

 D'Urville and Bronguiart have, from their occasional absence, included this species in FimbristyUs. 



3. ISOLEPIS, Br. 



1. Isolepis pygmcea, Kunth, En. Plant, vol. ii. p. 191. 



Yax.brevis. Isolepis brevis, Brong.in Dwperrey, Toy. Bot. p. ISO. I. Magellanica, Gaud. in Duperrey, 

 l r oy. Bot. p. 414. I. Meyeniana, Nees, in Nov. Act. Acad. Cms. vol. xix. Suppl. p. 87. 



Var. elongata. I. pygniaea, var. /3, Kunth, I. c. I. trigona, Kunze, in Poeppig, Coll. n. 1. p. 27 (?). 



Hab. Var. brevis, Falkland Islands, D'Urville, J. D. II. Var. elongata, Cape Tres Montes, 

 C. Darwin, Esq. 



The variations in the size, form, and markings on the surface of the achaenia of the otherwise almost identical 

 forms of Isolepis seem really endless. Falkland Island specimens are short, with small spikes, and small fuscous 

 achaenia, which are broader than long and punctulate, but the puneta not in parallel lines. Mr. Darwin's plant is 

 much longer, and has rather longer spikes, with elliptical ovate larger achaenia, which are longer than broad and 

 similarly punctulate, its culms are often ten inches long. The /. lepida, Nees (in Linnaea, vol. iv. p. 291), judging 

 by Cuming's Valparaiso specimens (in Herb. Hook.), resembles the plant of Mr. Darwin, its achaenia are precisely 

 similar to those of the Falkland Island variety in form, colour and surface, but scarcely half as large. 



The Cape of Good Hope I. pygmcea, so called by Kunth, has the achsnium of /. lepida, but pale coloured and 

 smaller still ; while the Auckland Island I. Aucklandica (p. 88. t. L) has larger fruit than any. 



All of the above differ from the European /. Savii, Seb. and Maur., in the achaenia not being so deeply punctate 

 or striate. In size and form the pericarp of /. Savii resembles that of the Falkland Island plant. 



4. CHiETOSPORA, Br. 



1. Ch.etospoka Antarctica, Hook, fil.; culmis dense caespitosis teretibus basi Miosis, foliis culnium 

 vix sequantibus anguste lineari-elongatis rigidis seniiteretibus super canaliculars glaberrimis, spiralis sub 6 

 in paniculam brevem coarctatani involucre 5-phyllo breviorem aggregatis 1-floris, squamis distichis carinatis 

 iinberbibus, setis liypogynis 6 capillaribus nucem superantibus. (Tab CXLVII.) 



Hab. Cape Tres Montes; Patch Cove, alt. 2,000 feet, C.Darwin, Esq. 



Radix e fibris crassis descendentibus. Rhizoma breve, inclinatum. Culmi dense caespitosi, rigidi, erecti. 

 Folia 6-pollicaria, basi in vaginam castaneam chartaceani 1 uuc. longam dilatata ; lamina vix \ lin. lata, apice 

 acuminata. Panicula sub 1 unc. longa, coarctata, involucro basi vaginante \ brevior. Spicules erectae, pedieellatse, 

 inferiores involucratas, \ unc. longa?, lineari-oblongae, uniilores. Squama sub 5, pallide flavo-fuscaa, nitidae, lineari- 

 oblongae, acuminata?, dorso carinatas, inferiores supremaque vacuae. Stamina 3. Selce hypogyuae 6, squamis breviores, 

 graciles, scaberulae. Nux elliptico-oblonga, angulis costatis, glaberrima, polita, pallide fusca. Stylus gracilis, 

 elongatus, apice stigmataque iiliformia exserta. 



Plate CXLVII. Fig. 1, spikelet ; fig. 2, flower with the anthers fallen away : — both magnified. 



2. Ch^etospora laxa, Hook, fil.; culmis dense cfespitosis teretibus basi foliosis, fobis cuhno brevioribus 

 anguste lineari-elongatis rigidis seniiteretibus super canaliculatis glaberrimis, spiculis plurimis in paniculam 



4 M 



