often growing together, they do not appear to pass into one another. The small size, depressed and stellate habit, densely fulvous silky clothing, and especially the hairy carpels always serve to distinguish the present.
Plate LXXXIII. Fig. 1, a flower ; fig. 2, the same, laid open ; fig. 3, front, and fig. 4, back view of a petal; fig. 5, young, and fig. 6, ripe carpel ; fig. 7, the same cut open showing the seed : — all magnified.
- * * Hecatonia, foliis integris.
7. Ranunculus liydroj>hilvs, Gaud. ; totus glaberrnnus, caule gracili repente, foliis longe petiolatis natantibus elliptico-ovatis integerrimis 3-5-nerviis, pedunculis axillaribus petiolo brevioribus, floribus parvis, petalis flavis spatlmlatis, carpellis paucis, stigmate subsessili. R. liydropliilus, Gaud, in Ann. So. Nat. vol. v. p. 105. Freycinet, Toy. Bot. p. 136 and 475. IfUrvitte in Mem. Soc. Linn. Paris, vol. iv. p. 515. (Tab. LXXXII. Fig. B.)
Hab. Falkland Islands; in streams, lagoons, and pools of fresh water, abundant; Gaudic/iaud, B'Urville, J. B. H.
Caules 4-8 unc. longi, parce ramosi, ad axillas folionun radicantes. Folia fasciculata, tenia cpiinave, basi vaginantia ; petioli 3-5 unc. longi, erecti, crassiusculi ; lamina parva, i unc. longa, plerumque natans, plana, obtusa, nervis 3-7 parallelis. Pedunculi ex axillis foliorum solitarii, petiolo rnultoties breviores, sub A unc. longi. Sepala late ovato-rotundata, membranacea. Petala calyce breviora, 1 lin. longa, flava, spathulata, infra medium squamifera, basin versus attenuata. Capitulurn parvum, globosuin. CarpeUa pauca, pallide flava, oblique oblonga, obtusa, vix 1 lin. longa.
A very distinct species, both in habit and in other characters, perhaps most resembing R. humilis, Hook, and Am. (Bot. of Beechey's Voy. p. 4.), which is a variety of R. trisepalus, Gillies ; but the present is not branched upwards, the flowers are very different, and the carpels are not punctate. The leaves much resemble the upper floating ones of Potamogeton heterophyllus.
Plate LXXXII. Fig. B. — Fig. 1, flower ; fig. 2, petal ; fig. 3, stamen ;fig. 4, young carpel ; fig. 5, ripe ditto; fig. 6, the same cut open : — all magnified.
8. Ranunculus trullifolius, Hook. fil.; glaberrimus, caulibus brevissimis sarmentosis, foliis radicalibus natantibus obovato-cuneatis integerrimis apicibus 3-5-dentatis, petiolis elongatis incrassatis superne attenuatis, pedunculis petiolo brevioribus, floribus inconspicuis, sepalis late ovato-rotundatis, petalis brevibus. (Tab. LXXXII. Fig. A.)
Hab. Falkland Islands ; St. Salvador Bay, in a fresh-water lagoon. Radix fibrosa, fibris crassis elongatis, e collo sarmenta elongata radicantia emittens. Folia omnia radiealia; petioli basi longe vaginantes, 4-6 mic. longi, teretes, antice canalicidati, vahdi, crassiuscidi, superne gradatim incrassati, infra laminam attenuati; lamina - unc. longa, abrupte truncata, grosse et inaequaliter 3-5-dentata, dentibus obtusis, 3-5-nerviis, nervis parallelis, limde viridis v. purpurascens. Flosfructusque ut in R. hjdropliilo sed paido majores et pedunculo crassiore.
Certainly more nearly allied to the former than to any other species of the genus ; but quite distinct, of a larger size and more succident habit, with leaves of a different form, abruptly truncate and lobed at the extremity.
Plate LXXXII. Fig. A.
