DICRANOPTERIS LINEARIS PDF

Dicranopteris linearis. Photo: Petra Ballings Vumba, Jevington road. Dicranopteris linearis. Photo: Bart Wursten Aberfoyle, Honde Valley. The plant can spread rapidly and is used in soil stabilization schemes. Known Hazards. In places where the plant’s habitat has been burned over, the stiff, erect . Description. Rhizome widely creeping, glabrous at maturity. Fronds spaced apart. Stipe up to 1 m long, golden brown, glabrous. Lamina times dichotomously.

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Delessert, G image! Shoalwater Bay passage, [Queensland,] R. From the Dictanopteris linearis narrow and parallel-sideda reference to the shape of the ultimate segments.

Dicranopteris linearis | New Zealand Plant Conservation Network

Fronds — mm long. Stipes 55— mm long, glabrous. Rachis bud sometimes extending once rarely twicehairy; rachis bud hairs red-brown, 1.

Pinnae — mm long, dicranopyeris mm wide; with 1 occasionally 2, with penultimate fork then pseudostipulate like the rachis bud, rarely 0 pseudodichotomous fork excluding growth from pinna buds ; pinna buds not extending or rarely extending once. Proximal-most primary costae 10—60 mm long, to mm long in pinnae with 2 pseudodichotomous forks, lacking costal segments excluding pseudostipules.

Dicranopteris linearis

Ultimate leaflets narrowly ovate, rarely narrowly elliptic, 90— mm long, 22—75 mm wide, usually angustate, rarely caudate; with 25—54 pairs of ultimate segments. Ultimate segments narrowly oblong, 11—42 mm long, 2—4.

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Sori 6—20 either side of midvein, with 7—12 sporangia each. Dicranopteris linearis is the only species of Dicranopteris in New Zealand. It has not been recorded libearis the Kermadec Islands.

Dicranopteris linearis is confined in New Zealand to geothermal areas, often around active vents. It can be locally common. In contrast, the Australian lectotype of Gleichenia hermannii R.

The apices of the ultimate segments of the lectotype are a mixture of obtuse and emarginate, whereas New Zealand material is much more regularly emarginate. It thus resembles other taxa, such as D. Frond with pinnae each with two successive pseudodichotomous forks. Habit, and habitat under geothermal scrub. Rachis bud with pseudostipules and bases of accessory leaflets. Pinna bud with indumentum of hairs. Ultimate segments, showing colour difference between abaxial and adaxial surfaces, sori, forked venation, and emarginate apices.

Abaxial surface of ultimate segments, with sori, and red hairs on proximal part of midvein. Red-brown branched hairs on proximal part of midvein of ultimate segment. Veins of ultimate segments branching at least twice between midvein and margin, and bearing red-brown glands.

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