Click for help
Liverworts v1 (2008) - A Flora of the Liverworts and Hornworts of New Zealand Volume 1
Copy a link to this page Cite this record

Haplomitrium Nees

Haplomitrium Nees

Scalius Gray, Nat. Arr. Brit. Pl. 1: 704. 1821, nom. rej.

Mniopsis Dumort., Commentat. Bot. 114. 1822, hom. illeg. non Mniopsis Martius, 1822.

Haplomitrium Nees, Naturgesch. Eur. Leberm. 1: 98, 100, 109. 1833, nom. cons.

Calobryum Nees in Gottsche, Lindenb. & Nees, Syn. Hepat. 507. 1846.

Rhopalanthus Lindb., Not. Sällsk. Fauna Fl. Fenn. Förh. 13: 390. 1874.

Scalia Spruce, Trans. & Proc. Bot. Soc. Edinburgh 15: 532. 1885, hom. illeg. non Scalia Sims, 1806.

Steereomitrium E.O.Campb., Mem. New York Bot. Gard. 45: 569. 1987.

Type: Haplomitrium hookeri (Sm.) Nees (≡Jungermannia hookeri Sm.)

Key to Species

1
Plants with stems leafless or microphyllous below, bearing only a few cycles of mature leaves, the leaves rather abruptly larger distally; antheridia in ± definite terminal receptacles, the antheridia never scattered; leaves nearly always broader than long; calyptra massive, a shoot-calyptra, with unfertilized archegonia and bractlets scattered on its surface; vigorous plants, to 16–20(30) mm tall and 6–7.5 mm wide (♀ plants)
H. gibbsiae (p. 63)
Plants leafy throughout their length, bearing a number of cycles of mature leaves, the leaves subequal in size throughout shoot; antheridia in part scattered and indefinite in position, not in terminal receptacles; leaves longer than wide; calyptra smooth, thin, lacking bractlets on surface, the unfertilized archegonia at or near its base; slender and tiny plants
2
2
Leaves sometimes bifid nearly to base; ♂ bracts and bracteoles arranged in partial spirals, a triquetrous arrangement in androecium lacking; oil-bodies 25–35 per cell, botryoidal. Campbell Is. (60–80 m), South Is. (900–1280 m)
H. ovalifolium (p. 61)
Leaves undivided, never bifid; ♂ bracts and bracteoles in triquetrous arrangement; oil-bodies mostly 11–21 per cell, finely granular. Artificial sites (Turf Research Inst., bowling greens)
H. minutum (p. 65)

A genus consisting of some 15 species. The genus is rather widespread in distribution, but the species are, for the most part, restricted in range, as follows: Haplomitrium ovalifolium and H. minutum (restricted to our area), H. gibbsiae (New Zealand, Tasmania), H. intermedium Berrie (Australia: New South Wales), H. chilensis R.M.Schust. (southern South America), H. monoicum J.J.Engel (New Caledonia), H. blumii (Nees) R.M.Schust. (Java, Sumatra, New Guinea, Taiwan, Eastern Himalayas of India), H. giganteum (Steph.) Grolle (Philippines); H. mnioides (Lindb.) R.M.Schust. (Japan, Taiwan), H. dentatum (D.Kumar & Udar) J.J.Engel,  H. grollei D.Kumar & Udar,  H. kashyapii Udar & D.Kumar  H. indicum (Udar & Chandra) R.M.Schust. from the Darjeeling region of India, H. hookeri (Sm.) Nees (Europe, Spitsbergen, West Greenland, eastern North America, western North America, Japan, Eastern Himalayas of India, West Himalayas of India) and H. andinum (Spruce) R.M.Schust. (Neotropics).

Affinities of order Calobryales are controversial, e.g., Bartholomew-Began (1991) would argue for a common ancestry with Metzgeriales. The group has been included in a number of recent phylogenetic studies, with variable phylogenetic position (e.g., Crandall-Stotler and Stotler, 2000; Forrest and Crandall-Stotler, 2005). We follow Schuster (1966b, 1967d, 2002a) in maintaining a traditional position of the order.

The treatment of this order is adapted and modified from Schuster (1967d, 1971b).

References: Bartholomew-Began (1991; morphogenetics of genus); Campbell (1959, H. gibbsiae); Engel (1982a, H. monoicum of New Caledonia + general comments); Engel and Schuster (1994, H. minutum); Schuster (1967d, rev.; 1971b, H. ovalifolium; 2002a).

Click to go back to the top of the page
Top