Campbell's Islands.] FLORA ANTARCTICA. 81 



2. ROSTKOVIA, Desv. 



Flos majusculus, solitarius. Perianthium glumaceum, hexaphyllum ; foliolis lineari-subulatis, 3 exteriori- 

 bus paulo majoribus, dorso acutis. Stamina 6, imo perianthii inserta, foliolis opposita ; antherm apice unguicu- 

 latae. Ovarium oblongum, elongatum v. ovatum, trigonura, uniloculare. Ovula plurima, biserialia, placentis 

 3 parietalibus adnexa, anatropa. Stylus validus, elongatus, apice incrassatus. Stigmata 3, exserta, maxima, 

 lineari-subulata, intus glandulosa, dorso profunde canaliculars. Capsula unilocularis, trivalvis, valvis medio 

 intus carinatis, carinis e septis retractis formatis. Semina plurima, horizontalia v. ascendentia. Testa, varia. 

 Embryo minimus, subquadratus, in basi albuminis carnosi inclusus. — Herbae Antarctica. Culmi basi vaginati. 

 Folia solitaria v. plurima, elongata, teretia. Scapi graciles, apice uniflori, foliis breviores. — Character ex Des- 

 vaux, paucis mutatis. — Rostkovia et Marsippospermum, Desv. 



1. Rostkovia Magellanica ; culmis casspitosis simplicibus v. ima basi divisis, foliis plurimis 

 strictis erectis basi vaginantibus longe lineari-subulatis semiteretibus infra medium canaliculatis, sea- 

 pis foliis longioribus, floribus bractea elongata subtensis, perianthii foliolis ovato-lanceolatis margini- 

 bus late scarioso-membranaceis, capsula perianthio paulo longiore, seminum testa albumine conformi 

 coriacea. — Rostkovia sphaerocarpa, Desvaux, Journ. de Bot. vol. i. p. 327. Juncus Magellanicus, Lamk. 

 Encycl. Method, iii. p. 266. Gaud, in Ann. Sc. Nat. vol. v. p. 100, et in Freyc. Voy. Bot. p. 132. 

 D'Urv. Fl. Ins. Mai. in Ann. Soc. Linn. Paris, vol. iv. p. 604. Kunth, En. Plant, vol. iii. p. 357- 



Hab. Campbell's Island ; in mossy and springy places on the hills, especially at the sources of 

 streams. 



Culmi basi compressi, subelongati, inclinati, fibras crassas emittentes, interdum subsurculosi, simplices vel 

 divisi, rarius parce ramosi. Folia plurima, ad basin scapi cujusvis 8-10, erecta, stricta, rigida, longissime 

 lineari-subulata, 5-10 unc. longa, basi longe vaginantia, semiteretia v. obscure trigona, intus solida, supra basi 

 ad medium canaliculars, superne subtriquetra, ad apices pungentia, plus minusve curvata, glaberrima, polita, 

 nitida : vagina? compressse, \- 1 unc. longse, basi 3-4 lin. lata, subchartacea?, superne coriacea?, oblique trun- 

 cate. Scapi solitarii v. rarissime duo, erecti, graciles, teretes v. subtrigoni, foliis ^—^ breviores, infra florem soli- 

 tarium subincrassati, rigidi, solidi. Bractea ad basin floris 2, valde inaequales ; superior e basi ovato-lanceolata 

 subulata, concava, chartacea, perianthium vix superans ; inferior concava, e basi vaginante late ovata, longe 

 subulata, erecta, stricta, perianthium bis quaterve superans, interdum folium omnino simulans. Perianthium 

 \ unc. longum ; foliola lineari-oblonga, attenuata, acuta v. acuminata, inter se subsequalia ; exteriora paulo 

 majora, concava, dorso acuta, superne carinata, coriacea, striata, castanea, nitida, marginibus late scariosis, pal- 

 lidis ; interiora planiora, medio incrassata. Stamina 6, inclusa ; filamenta linearia, medio uninervia, perianthio 

 £ breviora ; anthera lineares, elongate, filamentis paulo breviores ; connectivo ultra apicem in unguem brevern, 

 obtusum, subrecurvum producto ; loculis parallelis, rimis lateralibus dehiscentibus. Pollen tetragonum, intus 3-4- 

 granulosum, flavum. Ovarium elliptico-ovatum, in stylum attenuatum, obtuse trigonum, 1-loculare. Placenta 

 nerviformes, parietales, dissepimentis obsoletis site. Ovula plurima, biserialia, ascendentia, funiculis brevibus pla- 

 centis adnexa, anatropa. Stylus elongatus, erectus, validus, strictus, basi gracilis, superne gradatim incrassatus, 

 ovario aequilongus. Stigmata 3, tota exserta, erecto-patentia, subulato-filiformia, ad baseos latiores confluentia, 

 intus per totam longitudinem glandulosa, dorso glaberrima, profunde canaliculata. Capsula perianthium superans, 

 late obovato-oblonga, prismatica, angulis obtusiusculis, apice acuta, v. stylo persistente mucronata, dura et cori- 

 acea, sublignea, castanea, nitida, quasi vernicosa, unilocularis, polysperma, trivalvis ; valvce oblonga?, utrinque 

 acuta?, concava?, dorso medio canaliculate, intus septo incompleto costatre. Semina numerosa, conferta, lentifor- 

 mia, utrinque obtusa, paulo compressa, latere unico subcarinata, hevia, castanea, nitida, basi pallidiora ; umbilico 

 nudo. Membrana seminis exterior crassa, coriacea, intus spongiosa ; interior membranacea, obscure reticulata, 

 VOL. I. M 



