Rare and peculiar hornworts: Notothylas orbicularis and N. javanica (Notothyladaceae), new genus and species records for Australia

D. CHRISTINE CARGILL

doi:10.11646/phytotaxa.275.1.1

Issue: Vol. 275 No. 1: 16 September 2016

Type: Article

Published: 2016-09-16

DOI: 10.11646/phytotaxa.275.1.1

Page range: 1–13

Abstract views: 25

PDF downloaded: 1

**Rare and peculiar hornworts: Notothylas orbicularis and N. javanica (Notothyladaceae), new genus and species records for Australia**

D. CHRISTINE CARGILL⁺⁻

Australian National Herbarium, Centre for Australian National Biodiversity Research. GPO Box 1600 Canberra. ACT. Australia 2601 Australian National Botanic Gardens. GPO Box 1777. Canberra. ACT. 2601. Australia.

Notothylas javanica Notothylas orbicularis northern Australia hornworts Northern Territory Bryophytes Australia

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Abstract

The hornwort genus Notothylas is newly recorded for Australia. Detailed descriptions, illustrations and a key to the two known species, N. orbicularis and N. javanica are provided. A peculiar phenomenon involving presentation of the sporophyte on the ventral (rather than the dorsal) surface of the gametophyte, known only in Australian populations of Notothylas, is reported and discussed.