Campbell's Islands.] FLORA ANTARCTICA. 41 



1 -celled, I have rarely found divided into two cells by a more or less thickened septum. Two bundles of vessels, 

 one from each of the arms of the style, meet in the column and traverse its length ; at the summit of the ovarium 

 they sometimes again divide, and as separate cords enter its cavity, meeting again in the central column whicli 

 bears the placenta?. 



The last circumstance to which I shall here allude concerns the inflorescence of these species of Stylidiem. 

 In one of Mr. Bidwill's specimens of F. sedi/olia from the mountain of Tongariro, in the Northern Island of 

 New Zealand, the peduncle is 2-flowered, and the position of the bracts on the pedicels, and at the base of the 

 ovaria, shows their true situation and the nature of the inflorescence to be the same in Forstera as in many 

 Stylidia. This two-flowered specimen has six bracts, two of which are placed at the forking of the peduncle, 

 one situated upon and belonging to each of the pedicels ; but the other four form two pairs, each pair placed imme- 

 diately at the base of the ovarium. In the solitary and sessile-flowered species it is sometimes difficult to di- 

 stinguish the bracts from the upper leaves ; in F. clavigera however they are sufficiently distinct, but never more 

 than two, nor in P. uliginosa are there probably more, though they gradually pass into the ordinary forms of the 

 leaf. In the latter plant some foliaceous expansions, which are generally considered as segments of the calyx, 

 are often placed upon the germen ; I have not remarked how they are disposed upon distinctly fertile ovaria of 

 this species ; where however that organ is imperfectly developed, it may be readily understood how a little 

 irregularity in the insertion either of the calycine lobes or bracts might lead to the one being mistaken for the 

 other. 



Plate XXVIII. Fig. 1, branch of F. clavigera with an expanded plicate corolla, and the arms of the style 

 developed ; figs. 2 and 3, cauline leaves from the same ; fig. 4, flower with the segments of the corolla even and 

 plane ; fig. 5, a portion of a corolla from fig. 1 ; fig. 6, ovarium and epigynous glands ; fig. 7, column with per- 

 fect anthers ; fig. 8, longitudinal section of the same ; fig. 9, pollen from the same ; fig. 10, anthers after the 

 pollen has escaped ; fig. 11, column with stigmata and imperfect anthers ; fig. 12, transverse section of 1 -celled 

 ovarium ; fig. 13, longitudinal section of 2-celled do. ; fig. 14, immature seeds : — all magnified. 



XVII. LOBELIACE.E, Juss. 



1. PRATIA, Gaud. 



Calyeis tubus ovatus v. obovatus, rarius obconicus, lobis 5 ovatis acutis superioribus paulo longioribus. 

 Corolla subcampanulata, longitudinaliter fissa, unilabiata, lobis subaequalibus elongato-ovatis. Anthera 2, infe- 

 riores apice setis paucis terminatae. Stigma bilobum, lobis extus puberulis. Fructus indehiscens, baccatus, 

 bilocularis, carnosus, v. membranaceus, polyspermus. — Herbse parvce, glabra, repentes, Australes et Antarctica, 

 succo aqueo ; ramis radicantibus divaricatim ramosis. Folia alterna. Pedunculi solitarii, nudi, v. bracteoluti. 



1. Pratia arenaria, Hook. fil. ; glaberrima, subcarnosa, foliis breviter petiolatis ovato- v. ob- 

 ovato-rotundatis undulatis marginibus obtuse sinuato-dentatis, floribus immaturis in axillis foliorum 

 sessilibus, fructibus brevissime pedunculatis globosis purpureis. (Tab. XXIX.) 



Hab. Lord Auckland's group ; creeping over the open sandy shores of Enderby's Islet, Ren- 

 dezvous Harbour : Lieut. H. Oakeley. 



Caules elongati, 4-7 uncias longi, crassi, carnosi, diametro pennae gallina?, teretes, divaricatim ramosi, 



ramis paucis patentibus repentibus ad axillas foliorum inferiorum fibras crassas emittentibus. Folia remota, sub- 



semiunciam longa, distantia, horizontaliter patentia, v. ascendentia, circumscriptione plus minusve rotundata, 



plerumque concava, undulata, carnosa, in petiolum latum brevem 2 lin. longum contracta, f unc. lata, paulo 



VOL. I. G 



