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Observations on Grasses in the Auckland Region

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Observations on Grasses in the Auckland Region Observations on Grasses in the Auckland Region M. D. Wilcox Introduction Browns Island Motutapu Rakino Motuihe and Grasses (Gramineae or Poaceae) feature prominently Waiheke — owes much of its character to grass in the man made or modified vegetation of the covered slopes which are green for much of the year Auckland region particularly in farm pastures but brown in long dry summers when the grass dries roadside verges playing fields racecourses golf off. courses and lawns. They are well adapted to grazing and mowing because new growth continually takes Grasses rarely seem to have been locally or regionally place below the leaf blades from the protected surveyed in New Zealand. This paper records and sheath enclosed growing points at the base of the discusses the indigenous adventive and cultivated plant. Many grasses also occur as weeds of grass species occurring in the region defined here as wasteland cultivated soils and disturbed sites as the territory administered under the Auckland components of maritime vegetation and a few species Regional Council (see Fig. 1) comprising the cities of are prominent in forest and forest fringes. The Auckland (including most of the Gulf islands) Auckland city hillscape — exemplified by the volcanic Manukau Waitakere and North Shore the whole of cones of North Head Mt Eden Mt Hobson Mt St the districts of Rodney (including Kawau Island) and John Mt Roskill Mt Albert One Tree Hill Mt Albert Papakura and the northern half of Franklin district. Mt Wellington and Mangere Mountain — and many of Altogether there are some 203 grasses recorded from the inner islands of the Hauraki Gulf — especially the region. Aucklands grass vegetation and flora is dominated by introduced species. There are no indigenous grasslands as such in the Auckland region and themparatively few native species we have tend only to occur patchily or marginally in native bush {Echinopogon ovatus Micro laena avenacea M. stipoides Oplismenus hirtellus subsp imbecilus Poa imbecilla Rytidosperma gracile) on bluffs or coastal cliffs {Cortaderia splendens Lachnagrostis littoralis Poa anceps Trisetum ardua num) in wetlands ( Isachne globosa) in gumland scrub and roadside margins on sites of low fertility {Deyeuxia quadriseta Dichelachne crinita D. inaequiglumis Rytidosperma biannulare) as a coastal turf on the West Coast {Zoysia pauciflora) in or adjoining salt marsh {Austrostipa stipoides Puccinellia stricta ) or on coastal sand {Lachnagrostis b/ila rdierei Spin/Tex sericeus). The so called "danthonia" grassland on dn/ grazing land of poor fertility may include some native species such as Micro/aena stipoides Rytidosperma unarede R. gracile R. clavatum) though the commonest of the danthonia type grasses are usually the introduced Rytidosperma racemosum and R. penicillatum. Growth of pasture grasses usually com mences vigorously in late September with the spring flush of the common introduced European grasses such as cocksfoot {Dactylis glomerata) sweet vernal {Anthoxanthum odoratum) Yorkshire fog {Holcus lanatus) and perennial ryegrass Coastal ands: Austrofestuca littoralis {Great Barrier {Lolium perenne). Annual poa {Poa annua) is a Is.) Aird caryophyllea Ammophila arenaria Briza prominent winter grass making most of its growth maxima Briza minor Bromus arenarius Bromus flowering and seeding from late autumn to spring diandrus Lachnagrostis billardierei Lagurus ovatus (and it is also the dominant grass of golf greens in Spinifex sericeus Stenotaphrum sec un datum Auckland maintained over the summer by regular irrigation). The annuals die towards the end of the Roadsides and waste places (city): Andropogon year. At this time the summer green grasses become virginicus Anthoxanthum odoratum Arundo donax prominent especially paspalum {Paspalum dilatatum). Arrhenatherum elatius Avena fatua Bromus diandrus (near sea) Bromus lithobius Bromus willdenowii Some grasses have a long flowering season examples Cortaderia jubata (bare ground) Cortaderia selloana being cocksfoot Yorkshire fog rye grass sweet (bare ground) Echinochloa crus pavonis Holcus vernal and particularly ratstail {Sporobolus africanus) lanatus Lachnagrostis filiformis Lolium multiflorum which flowers from October through until July. Lolium perenne Nasella neesiana Paspalum Browntop {Agrostis capillaris) and crested dogstail dilatatum Paspalum orbiculare Paspalum urvillei {Cynosurus cristatus) flower relatively late (January) Pennisetum latifolium Phalaris aquatica Phalaris as do paspalum and its relatives. canariensis Phalaris minor Piptatherum miliaceum (city waste sections) Polypogon fugax Schedonorus The summer green grasses are most prominent from phoenix Setaria gracilis Setaria pumila Vulpia January through to mid autumn (May) this group bromoides Vulpia myuros. comprising Paspalum dilatatum Paspalum urvillei Eleusine indica Setaria glauca Setaria gracilis Forest edges and open disturbed sites: Briza Bothriochloa macra Axonopus fissifolius Echinochloa maxima Dichelachne crinita Echinopogon ovatus crus galli Digitaria sanguinalis Panicum Gastridium ventricosum Panicum dichotomiflorum dichotomiflorum and Panicum ca pi I Ia re. Gumlands: Cortaderia jubata Deyeuxia quadriseta Grass habitats Dichelachne inaequiglumis Eragrostis brownii Shaded forest or forest margins: Lachnagrostis filiformis Miscanthus nepalensis Brachypodium sylvaticum Crites/dn murinum (under Rytidosperma sw. Sieglingia decumbens. farm trees especially macrocarpa) Dactylis glomerata (the most shade tolerant of the common European Pastures (poor unimproved): Agrostis capillaris pasture grasses) Echinopogon ovatus Ehrharta Anthoxanthum odoratum Bothriochloa macra Bromus erecta En tolas ia marginata Microlaena avenacea hordeaceum Lolium rigidum Paspalum dilatatum Microlaena polynoda Microlaena stipoides Pennisetum clandestinum Poa trivialis Rytidosperma Oplismenus hirtellus subsp imbecilus Rytidosperma racemosum Sporobolus indicus Vulpia bromoides gracile. Pastures (good improved): Agrostis capillaris Wet sites (freshwater): Agrostis stolonifera Cynosurus cristata Dactylis glomerata Lolium Alopecurus geniculatus Glyceria declinata Glyceria perenne Paspalum dilatatum Poa trivialis. maxima Isachne globosa Paspalum distichum Polypogon viridis. Cultivated soil gardens paths: Cynodon dactylon Digitaria sanguinalis Echinochloa crus galli Ehrharta Wet sites (salt marshes sand flats): Agrostis erecta Eleusine indica Elytrigia repens Poa trivialis stolonifera A ustrostipa stipoides Cata podium rigidum Setaria gracilis Setaria pumila Setaria verticillata Cynodon dactylon Critesion murinum Elytrigia Setaria viridis. pycnantha Hainardia cylindrica Lachnagrostis filiformis Parapholis incurva Parapholis strigosa Lawns sportsfields golf courses: Agrostis Paspalum vaginatum Polypogon fugax Polypogon capillaris Agrostis stolonifera Axonopus fissifolius monspeliensis Puccinellia stricta Schedonorus Lolium perenne Microlaena stipoides Paspalum phoenix Spartina a/term;flora Spartina ang/ica. dilatatum Pennisetum clandestinum Poa annua Poa trivialis. Coastal banks and cliffs: Austrostipa stipoides Bothriochloa macra Chionochloa bromoides Cultivated and semi wild bamboos: Bambusa Cortaderia fulvida Cortaderia jubata Cortaderia balcooa Bambusa multiplex Bambusa oldhamii selloana Cortaderia splendens Elymus multiflorus Chusquea culeou Dendrocalamus latiflorus Lachnagrostis billardierei Lachnagrostis littoralis Poa Himalayacalamus falconeri Phyllostachys aurea anceps Zoysia pauciflora. Phyllostachys nigra var. nigra Phyllostachys nigrae. 2 henonis Pleioblastus auricomus Pseudosasa Band Cymbopogon atratus Festuca glauca japonica. Hakonechloa macra Helictotrichon sempervirens Miscanthus sinensis var. zebrinus Phalaris Cultivated and ornamental grasses: Anemanthele arundinacea var. picta Pennisetum seta ce um lessoniana Arundo donax var. versicolor Avena Piptatherum miliaceum Saccharum officinarum sativa Avena sterilis Bouteloua gracilis Chionochloa Setaria paImifolia Zea mays. flavicans Coix lacryma jobi Cortaderia selloana Gold Table 1: Flowering period of some common Auckland grasses Agrostis capillaris Alopecurus pratensis Anthoxanthum odoratum Arrhenatherum elatius Avena fatua Axonopus fissifolius Bothriochloa macra Bromus hordeaceus Bromus willdenowii Cortaderia jubata Cortaderia selloana Critesion murinum Cynosurus cristatus Dactylis glomerata Digitaria sanguinalis Echinochloa crus galli Ehrharta erecta Eleusine indica Holcus lanatus Lolium perenne Microlaena stipoides Paspalum dilatatum Poa annua Poa trivialis Polypogon monspeliensis Rytidosperma racemosum Schedonorus phoenix Setaria pumila Sporobolus africanus Note: Poa annua flowers throughout the year if sufficient moisture is available (e.g. on irrigated golf greens). j List of grasses found in Auckland Note:Species marked are very rare or local or known only from old herbarium specimens. Species marked (cult.) are not wild in Auckland. Bambusoideae Cynosurus echinatus rough dogstail Bambusa balcooa borak bamboo (cult.) Dactylis glomerata cocksfoot Bambusa multiplex xiaoshun hedge bamboo (cult.) Deschampsia flexuosa wavy hairgrass Bambusa oldhamii Oldhams bamboo Deyeuxia quadriseta Chimonobambusa quadrangulans square stemmed bamboo (cult.)Dichelachn e crinita plume grass Chusquea culeou Chilean bamboo (cult.) Dichelachne inaequiglumis Dendrocalamus hookeri cult. Dichelachne micrantha Dendrocalamus latiflorus giant bamboo (cult.) Dichelachne rara Himalayacalamus falconeri fountain bamboo Echinopogon ovatus forest hedgehog grass Phyllostachys aurea walking stick
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