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Volume 4, 1871
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Art. XLIV.—Notes on the Local Distribution of Certain Plants common to the British Islands and New Zealand.

[Read before the Auckland Institute, 28th August, 1871.]

Ranunculaceæ.

Ranunculus parviflorus, L., var. australis. North of Waikato. Differs from the typical form in the hooked style only.

Cruciferæ.

Nasturtium palustre, DC.

Cardamine hirsuta, L.

Of general distribution in both countries. The last exhibits a much greater amount of variation in New Zealand than in Britain.

Barbarea vulgaris, L. North of Auckland; local.

Caryophylieæ.

Spergularia rubra, Pers., var. marina. Often local in the north of New Zealand; general in the south.

Portulaceæ.

Montia fontana, L. Not found north of Waikato; usually a mountain plant. Common in Britain.

Geraniaceæ.

Geranium dissectum, L., var. caroliniarum. Sometimes difficult to distinguish from the typical form. The root is often annual. Distribution—general.

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G. molle, L. Distribution—general.

Oxalis corniculata, L. Distribution—general. South-west of England.

Rosaceæ.

Potentilla anserina, L. Distribution—South of Auckland Isthmus. In Britain general.

Halorageæ.

Callitriche verna, L. I have not seen specimens of the typical form. Our plant is C. Muelleri, which resembles the British C. platycarpa, Kuetz, but is not identical with any European form. It is probably common throughout the islands.

Onagrarieæ.

Epilobium tetragonum, L. Our plant differs considerably from either of the British forms referred to this species; from E. tetragonum, Curt., in its elongated stolons, and from E. obscurum, Schreb., in its remarkably stout erect habit, closely appressed leaves, and erect capsules. Distribution—general.

E. pallidiflorum, Sol., has the stolons and habit of E. obscurum, Schreb., differing only in the large white flowers.

Compositæ.

Gnaphalium luteo-album, L. Common on sandy coasts and in light soils. Alien in Britain.

Taraxacum Dens-leonis, Desf. All the New Zealand specimens I have seen belong to var. palustre, the montane form in Britain. Distribution—frequent south of Waikato; rare in the north.

Picris hieracioides, L. Distribution—chiefly north of Auckland. England.

Sonchus oleraceus, L., var. aspera. Distribution—general.

Convolvulaceæ.

Convolvulus sepium, L.

"Soldanella, L.

Distribution—general; the latter confined to the coast.

Solaneæ.

Solanum nigrum, L. Distribution—general. England.

Scrophularineæ.

Limosella aquatica, L., var. tenuifolia. Distribution—general, but often absent from extensive districts. Resembles the mountain form of Britain.

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Veronica Anagallis, L. Distribution—East Coast, Colenso. General in Britain.

Chenopodiaceæ.

Chenopodium urbicum, L. Distribution—North and South Islands; extremely local.

Chenopodium glaucum, L., var. ambiguum. Distribution—common on the coasts.

Suæda maritima, Dumort. Distribution—general on the coasts.

Atriplex patula, L. Distribution—East Coast, Colenso. In Britain general.

Polygoneæ.

Polygonum minus, Huds., var. decipiens. Distribution—general.

P. aviculare, L. Distribution—general. The var. Dryandri, which is local in the North Island, occurs in immense abundance in Canterbury and Otago.

Urticeæ.

Parietaria debilis, Forst. Distribution—general.

Typhaceæ.

Typha latifolia, L. Distribution—general. The male and female catkins are often separated.

T. angustifolia, L., has not been found in the colony.

Sparganium simplex, L. Distribution—North Island. Britain general.

Naiadeæ.

Lemna minor, L. Distribution—North and South Islands, but local. In Britain general.

L. gibba, L. Distribution—North Island, East Coast, Colenso. England.

Potamogeton natans, L. Distribution—general. Two forms are confused under this name—the ordinary P. natans, in which submerged leaves are wanting, and a form with large submerged leaves, which is the more common of the two, and respecting which full information is desirable. Young states of this have been mistaken by myself and others for P. heterophyllus, Schreb., which has not been found in New Zealand.

P. polygonifolius, Pourrett. Distribution—North Island, Great Omaha, and Papakura.

P. gramineus, L. P. ochreatus, Raoul, which is equally distinct from P. compressus, Sm., and P. gramineus, “L.,” has been mistaken for this; it is found at the Bay of Islands (Colenso), Waikato, Thames (T.K.), and Banks Peninsula (Raoul).

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P. pectinatus, L. Distribution—North Island, Hawkes Bay, and Waikato, In Britain general.

Ruppia maritima, L. Distribution—Frequent on the coast; in fresh water lakes in Waikato.

Zannichellia palustris, L. Distribution—North Island, Waikato, East Coast.

Zostera marina, L. Distribution—All round the coast. Flowers and fruit not seen.

Junceæ.

Juncus maritimus, Lam. Distribution—On all the coasts.

J. cummunis, E. Meyer.

J. bufonius, L.

Distribution general.

Luzula campestris, DC. Distribution—general; local in the north.

Cyperaceæ.

Scirpus maritimus, L. Distribution—On all the coasts, and in fresh water lakes Waikato.

S. lacustris, L. Distribution—general.

S. triqueter, L. Distribution—North Island, local. South Island, frequent. In England confined to the south, and local.

S. fluitans, L. Distribution—North Island, Waikato. In Britain general.

Carex stellulata, Good. Distribution—North and South Islands, but extremely rare. General in Britain.

C. teretiuscula, Good. Distribution—North and South Islands, local. Generally distributed in Britain, but less frequent than the preceding.

Gramineæ.

Alopecurus geniculatus, L. Distribution—General south of Waikato.

Agrostis canina, L. Distribution—Sub-alpine. In Britain general.

Phragmites communis, Fries. Distribution—Said to have been found in the province of Nelson. General in Britain.

Deschampsia cæspitosa, Pal. Distribution—Southwards from the East Cape. Sub-alpine in the South Island. General in Britain.

Kæleria cristata, Pers. Distribution—South Island. Local in England.

Festuca duriuscula, L. Distribution—General from the East Cape southwards. General in Britain.

Filices.

Hymenophyllum Tunbridgense, Sm. Distribution—general. In Britain local.

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H. unilaterale, Willd. Distribution—North and South Islands; local and sub-alpine. Local in Britain, but more frequent than the preceding, and ascending to a much greater altitude.

Cystopteris fragilis, Bernh. Distribution—North and South Islands, but local and sub-alpine. In Britain general.

Pteris aquilina, L., var. esculenta. Distribution—general. Of more rigid habit than the typical form.

Asplenium Trichomanes, L. Distribution—North and South Islands; local and sub-alpine. General in Britain.

Aspidium aculeatum, Swartz. Distribution—General from the Thames southward. Our plant is often non-indusiate, and differs from any of the British forms.

Nephrodium thelypteris, Schl., var. squamulosum. Distribution—North Island; extremely local. Differs from the typical form in the bullate scales only.

Ophioglossum vulgatum, L., var. lusitanicum. Distribution—general. O. lusitanicum is not found in Britain proper, confined to one of the Channel islands.

Lycopodiaceæ.

Lycopodium Selago, L. Distribution—South Island; sub-alpine.

L. clavatum, L., var. magellanicum. Distribution—North and South Islands; sub-alpine. Differs from the British form in the slender habit and spreading leaves, which are never hair-pointed.