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Volume 77, 1948-49
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Additions to the Marine Algae of New Zealand

[Read before the Hawke's Bay Branch; received by the Editor, November 18, 1947; issued separately, May, 1949.]

Phaeophyceae
Dictyotales
Fam. Dictyotaceae

Dictyota Lmx.

Dictyota papenfussii sp. nov. Plate 38, Figs. 1–3; Plate 39, Fig. 17.

Frondes primariae prostratae, dichotomae, ad 2 cm. longae; frons erecta, 7–19 cm. alta, atro-fusca, sub-cartilaginea, plana, linearis, decomposita; disco stipiteque stuposo, ramis infernis basi stuposis; axis princeps percurrens vel inferne furcatus, ad 4 mm. latus, spiraliter obtortus, superne angustatus; rami alternati, subdichotomopinnatim decomposita, rhachidibus principibus angustiores, breves si frondis altitudinem comparentur; ramuli ultimi perbreves, regulariter alternati, dentibus similiter; aplanosporae sphericae, paginis ambabus dispersae; partibus sexualibus nondum visis.

Primary fronds prostrate, up to 2 cm. long, flat, dichotomous; erect frond from 7–19 cm. high, dark brown, sub-cartilaginous, flat, linear, decompound, holdfast and stipe stupose, lowest branches basally stupose, main axis percurrent or forked below, up to 4mm. wide, spirally twisted, narrowing upwards, branches alternate, sub-dichotomo-pinnately decompound, narrower than main rachides and short in comparison with height of frond, ultimate ramuli very short, regularly alternate, tooth-like; aplanospores spherical, scattered on both surfaces; sexual organs not seen.

Type specimen No. 4110, Herb. Lindauer; co-types distributed in Lindauer, Algae Nova-Zelandicae Exsiccatae, Fasc. VIII, No. 187. Named in honour of Dr. G. F. Papenfuss.

Owing to the spiral twisting of the main rachides the branchlets often appear to be unilateral. The plant is of firm consistency when fresh, but, when placed in fresh water, it becomes limp and fades to greenish, at the same time staining the water pink.

Habitat: Pihama, Taranaki, in dense masses on stones in shallow water beyond low water mark; seasonal, from February to May. Mrs. Valerie May Jones (private correspondence) reports an identical plant in the Sydney Herbarium, colected near Sydney, N.S.W.

Rhodophyceae
Rhodymeniales
Fam. Rhodymeniaceae
Gloiodermatopsis Lindr. Gen. nov.

Gloiodermatopsis gen. nov.

Cum Gloioderma congruens quod attinet ad partes vegetativas, sed tetrasporangiis in nemathecia aliquantum elevata differentiataque aggregatis.

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Genus agreeing with Gloioderma in vegetative structure, but having tetrasporangia collected into somewhat raised and differentiated nemathecia.

G. setchellii sp. nov. Plate 38, Figs. 4–6; Plate 39, Figs. 15–16.

Frons erecta, plana, solida, rubelliana, nitens, aliquantum cartilaginea, fragilis, dichotoma, 6–14 cm. alta, 3–14 mm. lata, segmentis linearibus, divisionarum principum basi versus cuneatis, imminentibus, interconnexis, apicibus axilibusque rotundatis, marginibus integris vel marginaliter proliferatis, processis peranguste-linearibus, horizontalibus demum foliosis; medulla cellulis magnis, ellipsoideis, decoloratis, 2–3 stratis; cellulis zonae intermediae nonnullis stratis, minoribus; cellulis zonae anterioris aliquantum latae, minutis, arte confertis, assimilativis, seriebus anticlinis; filamentis interstitialibus texti interioris abessentibus; tetrasporangiis cruciatis, in aliquantum elevata inconspicuaque nemathecia aggregatis, super superficiem frondium plus minusve sparsa; cystocarpiis conspicuis, numerosis, marginalibus, sessilibus, cornutis; sporarum massa texto reticulato circumdata.

Frond erect, flat, solid, reddish, shiny, somewhat cartilaginous, brittle, dichotomous, from 6–14 cm. high and 3–14mm. wide, segments linear, cuneate towards the base of the main divisions, overlapping, interattached, axils and tips rounded, margins entire or proliferated marginally with very narrow-linear, horizontal processes later becoming foliose; structure of an inner tissue of 2–3 rows of large, ellipsoidal, colourless cells, an intermediate zone of several rows of smaller cells bounded by a rather wide outer zone of minute, closely-packed assimilative cells in rows perpendicular to the surface; interstitial filaments in inner tissue absent; tetrasporangia cruciate, collected into somewhat raised and inconspicuous nemathecia dispersed more or less over the whole surface; cystocarps conspicuous, numerous, marginal, sessile, horned, pericarpium with sporemass surrounded by reticulate tissue.

Type specimen No. 558, Herb. Lindauer; specimens distributed in Lindauer, Algae Nova-Zelandicae Exsiccatae, Fasc. V, No. 121. Named in honour of the late Professor W. A. Setchell.

G. setchellii when fresh is firm, brittle and opalescent, but is not lubricous. On drying it is shiny and cellophane-like, and the older parts do not adhere to the paper.

Habitat: Bay of Islands; sublittoral, often attached to Lithothamnion. Most plentiful from January to August.

Ceramiales
Fam. ceramiaceae
Euptilota Kuetz.

Euptilota mooreana Lindr. sp. nov. Plate 38, Figs. 13–14; Plate 40, Fig. 19.

Frondes epiphyticae, partibus juvenilibus roseae, partibus vetustioribus rubro-purpureis, ad 20 cm. altae, cartilagineae, 2–4-pinnatae, distichae, axi principe percurso, filiforme, sectione elliptico, translucido, corticato, sursum evidenter articulato, ramulis alternis, spatio 1–2 mm. regulariter dispositis, patentibus, conspicue distichis, plerumque 1 mm. vel nonnullis mm. longis, aliquibus longioribus, paucis in

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ramis longis, laxis, iregulariter dispositis, evenientibus, quam axi brevioribus sed pinnis similibus, rachidibus omnibus ramulis confertis, minutis, distichis, divaricatis, dichotome alternatis, articulatis, monosiphoniis, alternatim ad articulationis dispositis; axi centrale tubo uno articulato formalo, cellulis amplis ecoloratis circumdatis; cellulis corticalibus parvis; cellulis apicalibus diagonaliter segmentatis; tetrasporangiis tetrahedraliter divisis, terminalibus, ad slichidia simplicia vel brachiata supra ramulo ultimo dispositis; cystocarpiis terminalibus supra ramulos breves sertiles, dispositis.

Fronds epiphytic, rose-red in the younger parts, dark red-purple in the older, up to 20 cm. high, cartilaginous, 2–4 pinnate, distichous, main axis percurrent, filiform, elliptical in section, translucent, corticate, becoming visibly articulate upwards, bearing closely and evenly placed, conspicuously distichous, alternate, patent branches 1–2 mm. apart, most of which remain short, from 1 to several mm. in length. some longer, a few developing into long, lax, irregularly placed major branches, shorter than the main axis but pinnated similar to it, all rachides crowded with minute, distichous, divaricate, dichotomo-alternate articulate monosiphonous ramuli alternately placed one on each articulation; central axis of one articulate tube surrounded by a series of large colourless cells and a cortical layer of small coloured cells; apical cell diagonally segmented; tetrasporangia tetrahedrally divided terminal on simple or branched stichidia on the ultimate ramuli; cystocarps terminal on short fertile ramuli.

Type specimen No. 7435, Herb. Lindauer; co-types distributed in Lindauer, Algae Nova-Zelandicae Exsiceatae, Fasc. XI, No. 273. Named in honour of Miss L. B. Moore. Botanist, Plant Research Bureau, Wellington, New Zealand.

E. mooreana is almost always epiphytic on Pterocladia lucidu, although in extremely rare cases the author has sound it on Landsburgia quercifolia, and even on Zonaria subarticulata growing in a rock-pool.

The distribution of the plant is from the Farthest North southwards as far as Taranaki (on the west coast only), wherever Pterocladia lucida is found. Specimens from the extreme north are much smaller than are those from Taranaki, where it is most plentiful from December to May.

Fam. rhodomelaceae
Sub-fam. amansieae
Lenormandia Sond.

Lenormandia allanii Lindr. sp. nov. Plate 38, Figs. 7–12; Plate 40, Fig. 18.

Frondes epiphyticae, breviter stipitatae, ex disco orientes, puniceae, flaccidae, planae, lineares, distichae, 2–3 pinnatae, ad 10 cm. allae, 1–2·5 mm. lataque, laxe irregulariter ramosae; rami sursim, aliquandoque deorsum, gradatim angustali, ramulis ultimis oppositis vel suboppositis, costis subtus perspicuis, supra vix evidentis, superficiebus conspicue areolatis; basi frondis structura e cellula centrale, dorsiventraliter ex 2–3-seriebus cellularum pericentralium costam formantibus circumcinctis, in parte marginale complanata diminuentibus, itaque ordinem medianum ex cellulis magnis oblongis compositis et ordinem corticalem ex cellulis minutis, cuboideis compositis, formantibus; cystocarpia magna solitaria, sessilia, urceolata, ostiolata, subterminalia supra stichidiis simplicibus, marginalibus frondem regulariter fere ex basi ad apice limbantibus; tetrasporangia tripartita, subterminalia, seriebus 2 brevibus longitudinalibus supra singulis divisionibus stichidiorum ramosorum similariter positorum.

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Fig. 1—Tip of fertile frond. × 1 ½. Fig. 2—Basal portion showing prostrate frond. × 3 ½. Fig. 3—Cross-section.
Fig. 4—Upper portion of frond showing disposition of sori. × 1. Fig. 5—Tip of segment with sori. × 6. Fig. 6—Margin of frond showing cystocarps in various stages of growth. × 4.
Fig. 7—Portion of main rachis, showing areolate surface, × 5. Fig. 8—Portion of tetrasporie frond. × 6 ½. Fig. 9—Stichidium. × 84. Fig. 10—Tetrasporangium. Fig. 11—Portion of cystocarpic frond. × 6 ½. Fig. 12—Cystocarp. × 65. Euptilota mooreana Lindr. sp. nov.
Fig. 13—Tetrasporic pinnule, Fig. 14–Cystocarp.

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Fig. 15—Gloiodermatopsis setchellii Lind. sp. nov.; tetrasporie plant. × ½.

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Fig. 16—Gloiodermatopsis setchellii Lind. sp. nov.; cystocarpic plant. × ½.
Fig. 17—Dictyota papenfussii Lind. sp. nov. × ½. —Photo, W. C. White.

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Fig. 18—Lenor mandra allanii Lind. sp nov. × ½.

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Fig. 19—Euptilota mooreana Lind. sp. nov. × ½. —Photo, W. C. White.

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Fronds epiphytic, shortly stipulate, arising from a disc, pink, flaccid, flat, linear, distichous, 2–3-pinnate, up to 10 cm. high and 1–2·5 mm. wide, laxly, irregularly branched, branches narrowing gradually upwards and occasionally downwards, ultimate ramuli opposite to subopposite, midrib distinct below, more obscure above, surface conspicuously areolate; structure at base of frond of a central cell, surrounded dorsiventrally by 2–3-series of pericentral cells forming the midrib, diminishing in the complanate marginal portion to a medial row of large oblong cells and a cortical layer of tiny cuboidal cells; cystocarps large, solitary, sessile, urceolate, ostiolate, subterminal on simple marginal stichidia which fringe the frond in regular order almost from the base to the apex; tetrasporangia tripartite, subterminal, in 2 short longitudinal series on each division of similarly placed branched stichidia.

Type specimen No. 2071, Herb. Lindauer; co-types distributed in Lindauer, Algae Nova-Zelandicae Exsiccatae, Fasc. IV, No. 97. Named in honour of Dr. H. H. Allan, Director of the Botany Division, Plant Research Bureau, Department of Scientific and Industrial Research, Wellington, New Zealand, whose ever-ready assistance in algological matters, both theoretical and practical, has been of the greatest value to the writer.

L. allanii is usually epiphytic on Vidalia colensoi and, much more rarely, on Plocamium, during the warmer months of the year, and has been found on Ninety Mile Beach, in the Farthest North, from Cape Maria Van Diemen to Reef Point, and on the east coast at Mount Camel, Houhora Heads. It is somewhat difficult to recognize, even on being taken from the water, for, being very limp, it has a tendency to cling closely to the fronds of its host.

Acknowledgments: I wish to express my grateful appreciation of the kindness of Dr. H. H. Allan in preparing the Latin diagnoses for this paper, and to offer my thanks to Dr. Tore Levring, of Goteborg, Sweden, for assisting in determining the generic position of Euptilota mooreana. I am also indebted to Mr. W. C. White, official photographer of the Department of Scientific and Industrial Research, Wellington, for the splendid photographic reproductions.