01350nas a2200145 4500008004100000245009100041210006900132260001400201300001200215490000700227520087200234100002501106700002301131856005001154 1997 eng d00aOrigins and nature of vessels in monocotyledons. 2. Juncaginaceae and Scheuchzeriaceae0 aOrigins and nature of vessels in monocotyledons 2 Juncaginaceae  c23-1-1997 a397-4010 v173 aSEM studies of roots and rhizomes of Triglochin (one species) and Maundia (monotypic) of Juncaginaceae and the sole species of Scheuchzeriaceae, Scheuchzeria palustris, reveals that vessels are present not only in roots, as previously reported, but also in rhizomes. The perforations contain pit membranes with pores of various sizes. Striate pit membranes, like those previously seen in Acorus, occur on pit remnants in perforations and on pit membranes of lateral walls in all genera studied. Grooves interconnecting pit apertures are illustrated for root tracheary elements of Triglochin; this is believed to be a first report of this feature for monocotyledons. The tracheary elements of Juncaginaceae and Scheuchzeriaceae are similar in their thick walls and narrow slitlike pits, lending support to the close relationship between the two families often claimed.1 aSchneider, Edward, L1 aCarlquist, Sherwin uhttps://juncaginaceae.myspecies.info/node/31601429nas a2200157 4500008004100000245006700041210006600108300001200174490000700186520089700193653007301090100002201163700001301185700002301198856005001221 1997 eng d00a Inselberg vegetation and the biodiversity of granite outcrops0 aInselberg vegetation and the biodiversity of granite outcrops a193-1990 v803 aGranite inselbergs occur as mostly dome-shaped rock outcrops in all climatic and vegetational zones of the tropics. Consisting of Precambrian rocks, they form ancient and stable landscape elements. Due to harsh edaphic and microclimatic conditions, the vegetation of inselbergs differs markedly from those of the surroundings. Well defined inselberg habitats (e.g. cryptogamic crusts, rock pools, monocotyledonous mats, ephemeral flush vegetation) can be distinguished based on physiognomy. Plant diversity of inselbergs is influenced by both deterministic processes and stochastic environmental disturbances. The latter promote higher species richness due to the prevention of competitive exclusion. Considerable regional differences in floristic composition, life forms and species diversity exist concerning both the vegetation of whole inselbergs as well as those of individual habitats.10ainselbergs, Inselberge, granite outcrops, vegetation, flora, tropics1 aPorembski, Stefan1 aSeine, R1 aBarthlott, Wilhelm uhttps://juncaginaceae.myspecies.info/node/28200448nas a2200121 4500008004100000245010500041210006900146300001200215490000700227100001900234700002300253856005000276 1997 eng d00aPhylogenetic Studies in Alismatidae, II: Evolution of Marine Angiosperms (Seagrasses) and Hydrophily0 aPhylogenetic Studies in Alismatidae II Evolution of Marine Angio a443-4630 v221 aLes, Donald, H1 aCleland, Maryke, A uhttps://juncaginaceae.myspecies.info/node/20302344nas a2200217 4500008004100000245005000041210005000091300001200141490000700153520176400160653001201924653001001936653002101946653001501967653001501982653002201997100002402019700001502043700001802058856005002076 1997 eng d00aPlants of Western Australian granite outcrops0 aPlants of Western Australian granite outcrops a141-1580 v803 a

Outcropping granite rocks in Western Australia span a considerable climatic range, from the mediterranean south-west to inland desert and northern arid subtropics and tropics. At least 1320, and possibly 2000, plant taxa occur on Western Australian granite outcrops. Outcrop plant life is most diverse in the South West Botanical Province, with individual outcrops having up to 200 species, including many endemics not found in surrounding habitats. Species richness and local endemism declines with increasing aridity, to the point where Kimberley and Pilbara outcrops show little discontinuity in species from the surrounding landscape matrix. Outcrops are dominated by woody and herbaceous perennials, especially of the Myrtaceae, Orchidaceae, and Mimosaceae, and have an unusually rich diversity of annuals (Asteraceae, Stylidiaceae, Poaceae, Amaranthaceae etc.) compared with the flora as a whole. An unusual life form is found in resurrection plants capable of extreme desiccation and rehydration (e.g. Borya, Cheilanthes). Among woody perennials, bird pollination is frequent, and some outcrops harbour a high proportion of obligate seeder species due to the refuge from fire provided by bare rock barriers. The diversity of microhabitats and soil moisture regimes on outcrops has enabled the persistence of species beyond their main range in the face of climatic fluctuations. It has also facilitated the evolution of many endemics in the south-west. Major threatening processes facing outcrop plant communities include weed invasion, grazing by stock and feral animals, too-frequent fire, clearing, loss of shrub layer, salinity, and dieback. Conservation of these rich rare habitats needs the support of local communities.

10aannuals10aflora10agranite outcrops10aTriglochin10avegetation10aWestern Australia1 aHopper, Stephen, D.1 aBrown, A P1 aMarchant, N G uhttps://juncaginaceae.myspecies.info/node/16100387nas a2200145 4500008004100000245001800041210001800059260004000077300000700117490000600124100002200130700002200152700001800174856004900192 1997 eng d00aJuncaginaceae0 aJuncaginaceae aAddis AbababThe National Herbarium a180 v61 aDemissew, Sebsebe1 aDemissew, Sebsebe1 aHedberg, Inga uhttps://juncaginaceae.myspecies.info/node/91