Drucella integristipula

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Species

Drucella integristipula

Common Name(s)

liverwort

Current Conservation Status

2009 - Not Threatened

Conservation status of New Zealand indigenous vascular plants, 2012
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2012 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2009 and replaces all previous NZTCS lists for vascular plants. Authors: Peter J. de Lange, Jeremy R. Rolfe, Paul D. Champion, Shannel P. Courtney, Peter B. Heenan, John W. Barkla, Ewen K. Cameron, David A. Norton and Rodney A. Hitchmough. File size: 792KB

Previous Conservation Status

2004 - Sparse

Authority

Drucella integristipula (Steph.) E.A.Hodgs.

Family

Lepidoziaceae

Flora Category

Non Vascular - Native

Structural Class

Liverwort

Synonyms

Lepidozia integristipula Steph.

Distribution

Indigenous. Kermadec (Raoul I.), North, South and Chatham Islands. Also Australia (Queensland) and Fiji

Features

Anisophyllous, pallid green, nitid plants arising from a basalt system of creeping, microphyllous, strongly elongated, rarely branched rhizomatous or stoloniform axes from which arise ascending to erect branches. Branching irregular, intercalary, lateral. Stem rigid, wiry. Rhizoids occasional, arising at underleaf bases of older sectors of shoots, leaf bases and underleaves of rhizomes and stolons. Leaves contiguous to weakly imbricate, stiff and widely spreading, 160-250 micrometre long, separated by 1-3 cortical cells either side, insertion incubous; leaves asymmetrically cuneate to obtrapezoidal, 2-3-fid. Lobes unequal, entire, dorsal lobe linear-lanceolate, 2-4 cells wide at base, terminating in uniseriate row of 2-4 elongated cells, middle lobe similar to dorsal, ventral lobe smaller. Disc 2-4 cells high 5-6 cells wide, cells pellucid, thick walled, without trigones. Underleaves inserted on 2-3 rows of stem cells, obtrapezoid-quadrate, 2-3-lobed, lobes unequal. Dioecious. Androecia on short ventral-intercalary branches; bracts larger than vegetative leaves, concave, bifid; antheridia 1 per bract, stalk uniseriate. Gynoecia on short intercalary branches; bracts 2-3-seriate, appressed to perianth, 2-5-fid, lobes 2-4 cells wide at base. Perianth ovoid-cylindrical, mouth wide, lobulate-ciliate, cilia terminating in a uniseriate row of 4-8 cells; perianth unistratose. Seta with 8 rows of outer cells core of 14-16 smaller cells. Capsule short-ovoid, small, valves 140-145 x 315-330 micrometre, bistratose. Spores 8.6-13.2 micrometre diameter, reddish-brown or yellow-brown, reticulate. Elaters rigid 8.2-16 micrometre wide, slightly tapered, bispiral, spirals 2.4-2.9 micrometre wide.

Fruiting

October - January

Threats

A biologically sparse, naturally uncommon plant that is widespread but rarely abundant at any particular site.

The New Zealand Plant Conservation Network