Page:The Botany of the Antarctic Voyage.djvu/509

Falklands, etc.] tenerrima rosea, sons majusculis oblongis coccidiisque per frondem sparsis. Nobis in Lond. Jonrn. Bot. vol. iv. p. 254. (Tab. CLXXVI1.)

Hab. Hermite Island, Cape Horn ; abundant in deep water.

Radix discus cartilaginous. Stipes gracilis, i-£ unc. longus, cartilagineus, superne alatus, basin in frondem cuneatam abeuns, deinde gradatim evanescens. Frons 8-12 unc. longa v. longior, latitudine varia, lineari-oblonga v. late ovato-rotundata, integerrinia v. in lacinias fissa, adultior punctis crebriformibus pulcherrime terebrata, apice exemplaribus normalibus attenuata, margine integerrima, undulata, plus minusvc in lacinias fissa, subavenia v. basi solum nervis indistinctis e apice stipitis ortis notata. Sori numerosissiini, per totam frondis paginam sparsi. Sub- stantia tenerrima. Color pulcherrime roseus.

One of the most beautiful of the genus, and probably the southern representative of the European N.punclatum, chiefly distinguishable from it by the long cuneate base of the frond passing into a filiform stem and by the absence of dichotomous divisions with wide axils. The traces of the stem become gradually more faint at a short distance from the base of the frond, but do not break up into numerous veins. The normal form of the frond is broadly lanceolate, tapering to an acute point ; with waved but entire margins, which are, however, often split and torn into numerous linear ribbon-like segments, caused by injury and not the natural divisions of the frond.

Plate CLXXVII. — Fig. 1, portion of frond and sorus : — magnified. 4. Nitophyluuh multinerve, Hook. fil. et Harv.; fronde breviter stipitata elliptica v. ovata subintegerrima v. lobata, nervis pluribus parallelis distinctis dichotomis apicem versus frondis evanescentibus, soris ? Nobis in Lond.Journ. Bot. vol. iv. p. 255.

Hab. Hermite Island, Cape Horn, and Falkland Islands ; Berkeley Sound, on rocks, not common.

Stipes plemmque -~ unc. longus, nunc polbcaris, simplex. Frons in lacinias plurimas obtusas cito fissa, 2-4 unc. longa, basi rotundata v. cuneata ; nervis plurimis, validis, ad apicem frondis evanidis. Substantia membranaeea. Color roseus.

Of this plant we have not very satisfactory specimens, or which may not belong to the Delesseria dichotoma : except that in the present species the nerves are much fainter, less distinct from the lamina, and vanishing further from the apex of the frond, which evinces no tendency to form distinct leaves.

5. Nitophyllum Smithii, Hook. fil. et Harv.; fronde stipitata flabelliformi lobata basi cuneata superne divisa et lacera, apicibus laciniarum obtusis, marginibus planis, colore rubro subfuscescente, nervosa, nervis gradatim evanescentibus basilari centrali crasso lateralibus radiantibus teuuibus nunc evanidis, soris minutis rotundatis margines versus laciniarum frondis densissime sparsis. Nobis in Lond. Journ. Bot. vol. iv. p. 256. (Tab. CLXXVHI.)

Hab. Falkland Islands ; in the bays and along the outer sea coast, growing on the roots of larger Alga.

Frons 4-7 unc. longa, angusta v. latiuscula, in stipitem simplicem v. ramosam unc. longam et idtra desinens, forma varia ; nunc elongatse, lacerae ; juniores latiores, lobatse : laciniis latis, obtusis, emarginatis retusisve. Nervus centralis elongatus, basi latus, frondibus senioribus ultra medium extensus, junioribus cito evanidus ; laterales ad basin frondis flabellatim expansi, oblique arcuati. Substantia crassiuscula. Color ruber, demum fusceseens.

This is a very distinct species ; but, like its congeners, so variable in form that little dependence can be placed on the characters drawn from its outline, or from the length of the stipes. Our figure gives a very faithful representation of the colour and normal form of the old and young states, both veined and nearly veiidess.

Plate CLXXVHI. — Fig. 1, portion of frond and tetraspores ; fig. 2, ditto with coccidium : — both magnified.