Pyrola


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Pyrola

 

a genus of plants of the family Pyrolaceae. They are perennial grasses with creeping rhizomes. Their coriaceous leaves are located on the lower part of the stem. The flowers are pentamerous, and the corolla may be white, greenish, or reddish. The fruit is a pentagonal pod. There are about 40 species in the northern hemisphere, chiefly in temperate latitudes. In the USSR there are seven species, growing chiefly in the forest zone, in mossy coniferous and mixed forests. The most common species are Pyrola rotundifolia and Pyrola minor. The plants of this genus are sometimes grown for decoration in shady areas in parks and gardens.

References in periodicals archive ?
In the first stage, the flowers can only be cross-pollinated by insects (in Pyrola, Chimaphila, and Moneses) or by the wind (in Orthilia).
Floral scent variation in the Pyrola rotundifolia complex in Scandinavia and westem Greenland.
The large-flowered wintergreen (Pyrola grandiflora) bear spikes of pink flowers next to dryas (Dryas integrifolia), in Hudson Bay, Canada.
The most common herbaceous species in the group with conifer were: Anemone quinqefolia (L.), Arisaema triphyllum ((L.) Schott), Athyrium filix-femina (L.) Roth), Cornus canadensis (L.) and Coptis groenlandica ((Oeder) Fassett), whereas the most common herbaceous species in the group without conifer were; Dryopteris cristata (L.), Galium trzflorum (Michx.), Lathyrus ochroleucus (Hook.), Linnaea borealis (L.), Maianthemum canadense (Desf.), Polygala paucifolia (Willd.), Polygonatum pubescens ((Willd.) Pursh.), Pyrola minor (L.), Thelypteris phegopteris (L.) and U vularia grandiflora (J.
Pyrola secunda increased in both cleared and tephra plots between 1983 and 1989 at site SR after overall herb layer cover had reached a steady-state.
Mesic exposures tend to be dominated by fir (Abies lasiocarpa) and spruce (Picea glauca) with abundant ericaceous and other shrubs (e.g., Vaccinium spp., Ledum groenlandicum, Menziesia ferruginea, Salix spp., Ribes spp.) on deep feather-moss floors (Pleurozium shreberi, Hylacomnium splendens, Ptilium crista-castrensus) containing a typical boreal flora (Linnea borealis, Cornus canadensis, Pyrola spp., Equisetum spp., Streptopus amplexifolius).
The prevailing flowers and conspicuous small plants of the woods, which I noticed, were: Clintonia borealis, Linnoea, checkerberry (Gaultheria procumbens), Aralia nudicaulis (wild sarsaparilla), great round-leaved orchis, Dalibarda repens, Chiogenes hispidula (creeping snowberry), Oxalis acetosella (common wood-sorrel), Aster acuminatus, Pyrola secunda (one-sided pyrola), Medeola Virginica (Indian cucumber-root), small Circa (enchanter's nightshade), and perhaps Cornus Canadensis (dwarf-cornel).
The beech wood species occurring in the central Apennines which are very rare or absent in the southern Apennines include Geranium nodosum, Pyrola minor Veronica urticifolia, Cardamine enneaphyllos, Cardamine kitaibelii, Carex pilosa, Anemone ranunculoides, Anemone nemorosa, whereas species which are common in the central Apennines but are rare or absent in the northern Apennines include Anemone apennina, Allium pendulinum, Cardamine chelidonia and Cardamine graeca.
Shrub 11 Vaccinium 72.7 0.001 heath uliginosum Dryas 71.1 0.001 integrifolia Carex 68.1 0.001 bigelowii Rubus 63.6 0.001 chamaemorus Cassiope 63.6 0.001 tetragona Arctostaphylos 61.7 0.001 alpina Andromeda 45.5 0.001 polifolia Betula 44.7 0.001 glandulosa Pyrola 43.1 0.001 grandiflora Carex lugens 36.4 0.001 Ledum 27.3 0.006 decumbens Vaccinium 27.3 0.002 vitis-idaea Pedicularis 19.7 0.027 lanata Community Observations Total Mean % group or in group observations cover subtype within group 1.
Arbutoideae (Arbutus) are the next to branch after Enkianthus, followed by Pyrola (representing Monotropoideae).
Hummocks are well vegetated on sides and tops, primarily with sedges Eriophorum vaginatum and Carex chordorrhiza, which are interspersed with species such as Salix spp., Ranunculus pallasii, Rubus chamaemorus, Potentilla hyperarctica, Pyrola secunda, (although we found entirely P.
La segregacion de este grupo de tendencia orofila frente a los hayedos acidofilos orocantabricos (Blechno spicant- Fagetum sylvaticae y variante acidofila de la Omphalodo nitidae-Fagetum sylvaticae)(Tabla 3) queda claramente establecida por la ausencia en los hayedos estudiados de un nutrido grupo de especies presentes en estos ultimos, entre las que se pueden destacar Cicerbita plumieri, Corydalis cava, Dryopteris carthusiana, Dryopteris expansa, Festuca altissima, Galium rotundifolium, Genista florida, Gymnocarpium dryopteris, Melica uniflora, Mycelis muralis, Poa chaixii, Poa nemoralis, Pyrola minor, Stellaria nemorum, etc.