20. ACHYROPHORUS, Scop.
1. Achyrophortjs tenuifoUus, DC; glabriusculus v. subaraneosus, caule simplici, foliis gramineis omnibus radicalibus filiformibus v. angustissirne lineari-spathulatis lineari-lanceolatisve integerrimis sinuatis pimiatifidisve segmentis patentibus reruotis linearibus, scapo monocephalo, involucri ovato-campanulati squaims liirearibus lineari-lanceolatisve acuminatis plus minusve araneo-toinentosis basi sparse hispido-pilosis. A. tenuifolius, BC. Prodr. vol. vii. p. 94. Seriola tenuifolia, Hook, et Am. in Corny. Bot. Mag. vol. i. p. 81. S. incana, Rook, et Am. I. c. vol. ii. p. 42. Oreophila tenuifolia, Bon, MSS.
Hab. Strait of Magalhaens ; Port Gregory, Capt. King. Elizabeth Island, C. Darwin, Esq.
A very variable species in the foliage, which is narrow and grass-like. Mr. Darwin has gathered a variety at Port St. Julian on the Patagonian coast, with rather larger capitida, but which does not appear otherwise distinct; it is Seriola incana, H. and A. It has also been collected by Capt. King at Cape Fairweather.
2. Achyrophorus arenarius, Gaud.; parce liispido-pubescens v. glabriusculus, radice elongata collo 1-3-cephalo, foliis omnibus radicalibus lineari-obovato-lanceolatis interduin anguste lineari-elongatis longe petiolatis obtusis acuminatisve sinuato-dentatis pimiatifidisve, scapo foliis longiore monocephalo nudo foliisve 1-2 aucto, involucri campamdati squamis araneo-tomentosis glabratisve exterioribus parce hispido-pilosis. A. arenarius, BC. Prodr. vol. vii. p. 95. Hypochocris arenaria, Gaud, in Ann. Sc. Nat. vol. v. p. 103, et in Freyc. Voy. Bot. p. 134 et 461. B' Urv. in Mem. Soc. Linn. Paris, vol. iv. p. 609. H. minima ? Willd. B' Urv. 1. c. Seriola apargioides, Less. Hook, et Am. in Comp. Bot. Mag. vol. ii. p. 42. (Tab. CXTI. Bissection.)
Hab. Strait of Magalhaens, Port Gregory, Capt. King. Falkland Islands, Gaudichaud, B'Urville, C. Darwin, Esq., J. B. H.
This again is a highly variable plant, the majority of the Falkland Island specimens scarcely agreeing with Gaudichaud's description (as given in Freycinet's Voyage), in which the peduncles are said to be elongated and branched, though in the notes on the species, M. Gaudichaud states that they are either branched or simple. Small specimens entirely coincide with D'Urville's character of if. minima? Willd. The other species of this genus, as H. apargioides, and H. taraxacoides, are, however, so variable that the character of the single or many-flowered peduncle loses its value as a mark whereby to distinguish them.
Plate CXIL, middle dissections. Fig. 1, plumose pappus ; fig. 2, ripe achsenium, transversely rugose : — both magnified.
21. TARAXACUM, Hall.
1. Taraxacum dens-leonis, Desf.; Leontodon Taraxacum, Linn. Sp. PI. n. 1122.
Var. lavigatum. T. lsevigatum, BC. Cat. Hort. Monsp. p. 149. Prodr. vol. vii. p. 146. D' Urv. in Mem. Soc. Linn. Paris, vol.iv. p. 604. Gawd, in Freyc. Voy. Bot. p. 134. Leontodon Lycodon, Banks et Sol. MSS. in Mas. Banks, cum icone. (Tab. CXIL)
Hab. Fuegia, Good Success Bay, Banks and Solander. Falkland Islands, B'Urville, J.B.H.
This variety has also been collected at Port St. Julian on the Patagonian coast, by Mi-. Darwin.
Plate CXIL, right hand figure. Fig. 1, floret ; fig. 2, stamen ; fig. 3. seta of pappus ; fig. 4, ripe achaminm: — all magnified.
