Page:The Botany of the Antarctic Voyage.djvu/317

Falklands, etc.] vast mound of debris, the decaying remains of former years' growth, through which the roots descend into the ground. In Fuegia this plant is much scarcer, and only occurs on the mountains in small tufts. I have also seen specimens sent from M' Quarrie's Island by Mr. Frazer.

Plate XCLX. Fit/. 1, a leaf; fig. 2, umbel with peduncle and involucre; fig. 3, a flower; Jig. 4, a petal; fig. 5, ripe fruit ; fig. 6, transverse section of the same : — all magnified.

§ II. Caule prosfrato repente nodoso aclnodosfolwso,foliis longe petiolatis, umbettls sublonge pedunculatis.

6. Azorella Ranunculus, D'Urv.; glaberrhna, caule repente nodoso ad nodos radicante, foliis longe petiolatis rotundatis 4-5-partitis laciniis cuneatis trifidis segmentis rotundatis, petiolis graeilibus basi vaginantibus vaginis membranaceis, pedunculis axillaribus petiolo brevioribus, involucri foliolis linearibus sub- acutis pedicellis longioribus basi utrinque dente auctis, umbella 3-5-flora, calycis lhnbo obtuse 5-dentato, fructu breviter ovato subtereti ad comrnissuram contracto, mericarpiis dorso convexis obtuse 3-jugis. (Tab. XCVIII.) A. Ranunculus, If Urvdle in Mem. Soc. Linn. Paris, vol. iv. p. 614. Gaud, in Freyc. Voy. Bed. p. 136. PC. Prodr. vol. iv. p. 77.

Hab. Falkland Islands; by running streams and the margins of fresh-water lagoons, 1/ Urvdle, J.D.H.

Herba facie Hydroeotylis. Caules graciles, repentes, ad nodos foliosi radicesque fibrosas emittentes. Petioli erecti, unciales. Folia a una diametro, luride viridia, submtida. Flares parvi, pallide flavi sou albi. Fructus breviter pedicellatus.

This plant differs so materially in habit from those described above, that I have placed it in a separate section of the genus. The general aspect is altogether that of a Hydrocotyle, with the fi-uit of an Azorella, to which genus it was rightly referred by D'Urville; it also very much resembles the Fozoa reniformis, in Part 1. p. 15. t. xi. where the carpels are however very different. The fruit represented in Plate XCVIII is immature ; when fully ripe, the mericarps are more contracted at the suture.

Plate XCVIII. Fig. 1, a leaf; fig. 2, a flower; fig. 3, petal ; Jig. 4, ripening ovarium ; fig. 5, young fruit; fig. 6, transverse section of the same : — all magnified.

2. BOLAX, Comm.

1. Bolax glebaria, Commerson, in Juss. Gen. p. 266. GaudicJiaud in Ann. Sc. Nat. vol. v. p. 104. t. 3. f. 2. el in Freyc. Toy. Pot. p. 136. PC. Prodr. vol. iv. p. 78. D'Urville in Mem. Soc. Linn. Paris, vol. iv. p. 614. Hook. Icon. Plant, t. 492. B. gummifera et B. complicata, Sjoreng. Spec. Umlell. p. 9, 10. B. gumrnifer, Spreng. in Poem, et Schultes Syst. Veg. vol. vi. p. 360. excl. pleraque synonym. Azorella csespitosa, Yald, Symb. vol. iii. p. 48. Willd. Sp. PI. vol. i. p. 1365. non Cavanilles, et excl. syn. Chamitis trifurcatfe, Gaertn. A. tricuspidata, Lamk. Illust. Gen. 1. 1 89. Jig. 2 et 3 ? certe non f. 4. Poir. Suppl. vol.i. p. 551, in part. Hydrocotyle gummifera, Lamk. Encycl. vol. iii. p. 156. Chamitis complicata, Banks et Sol. MSS. in Mus. Banks, cum icone. Gommier, Pernetly, vol. ii. p. 7 et 65.

Hab. Tierra del Fuego, Commerson; Good Success Bay, Panks and Solander ; Hermite Island, growing in tufts on the high mountains, J.D.H.; Falkland Islands, very abundant, Gandichaud, Pf Urvdle, and all voyagers.

I have endeavoured to unravel the synonymy of this highly curious and now well-known plant, but cannot ascertain what are the various species figured by Lamarck and partially described by Poiret, both these writers seeming to have had several in view.