Topic
Juncus interior
About: Juncus interior is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 19 citations.
Papers
TL;DR: Specimens of the perennial Juncus of section Poiophylli in major Canadian herbaria were examined to clarify the status of the group in the prairie provinces and to evaluate diagnostic characters.
Abstract: Specimens of the perennial Juncus of section Poiophylli in major Canadian herbaria were examined to clarify the status of the group in the prairie provinces and to evaluate diagnostic characters. Six taxa are recognized. Of these, Juncus interior, which occurs in the prairie region of southern Manitoba, southern Saskatchewan, and southern Alberta, has been largely overlooked. Juncus confusus, frequently confused with Juncus tenuis, is confined to southwestern Saskatchewan and southern Alberta. Juncus dudleyi is widespread and common throughout the three provinces, whereas Juncus vaseyi is widespread but clearly less common in the prairie region than in the more northerly boreal forest areas. Juncus tenuis, also found mostly in the boreal forest region, is apparently frequent only in central Saskatchewan and is rare elsewhere. Juncus compressus is recently adventive in southern Manitoba. Reports of Juncus gerardii are discounted and J. oronensis is considered to be a rare hybrid. The diagnostic value of ch...
9 citations
TL;DR: In this paper, the silica content of living rhizomes from the perennial salt marsh rush Juncus roemerianus had values of 0.34, 0.20, and 0.6 mg/100g soil.
Abstract: Silica content of living rhizomes from the perennial salt marsh rush Juncus roemerianus had values of 0.34, 0.20, and 0.60% of dry weight in three morphologically distinct populations along the Mississippi coast and was directly related to available silica content of the soil (29.7, 17.0, 169.6 mg/100g soil, respectively). On the other hand, living leaves had about the same average silica content (0.93, 0.87, 0.9070 or dry weight). The silica content of living leaves varied from 0.142% in younger leaves to 1.520% in older ones. Similarly, rhizomes also increased in silica content with age, varying from 0.137% in younger portions to 1.030% for older ones. Mature leaves collected in October all had a higher average silica content (0.737%) than those collected in April (0.413%), indicating that silica content also increases over the growing season. Decomposed leaves (dead-standing) had a relatively high silica content o f 1.8170, obviously reflecting a loss of organic matter and soluble minerals. Roots contain considerable silica, but reliable results were not possible as the soil could not be completely removed from them. Petrographic microscope studies showed that the silica was clear, colorless and isotropic with a refractive index of 1.43, all properties typical of the mineral opal. No olquartz was present, as occurs in some species of Juncus. The silica was deposited in a sheet made up of small, irregular phytoliths arranged in rows lengthwise in the lcavcs. Ash percentages were much highcr than those for silica and no definite conclusions could be drawn from their variation. In comparison to the maximum silica content of leaves from Juncus interior (3.21%), the concentrations found in leaves of J. roemerianus were relatively low.
8 citations
Journal Article•
TL;DR: Fieldwork and herbarium studies have uncovered new or overlooked state records for 23 species, and reports herein represent significant distributional records or represent the only known current records for states.
Abstract: Fieldwork and herbarium studies have uncovered new or overlooked state records for 23 species: Agalinis divaricata, Cyperus grayi, Dichanthelium annulum, Echinodorus tenellus, Eleocharis engelmannii, Fimbristylis schoenoides, Gaylussacia nana, Hypericum lloydii, Juncus dudleyi, Juncus interior, Juncus militaris, Juncus nodatus, Juncus subcaudatus, Kalmia angusti/olia, Lipocarpha drummondii, Panicům dichotomisorum var. puritanorum, Polygala leptostachys, Pycnanthemum sexuosum, Rhynchospora cephalantha var. attenuata, Sagittaria chapmanii, Sclerolepis unisora, Utricularia juncea, Yeatesia viridisora. For 8 other species, the reports herein represent significant distributional records or represent the only known current records for states: Agalinis fili/olia, Aletris lutea, Boltonia diffusa, Fuirena pumila, Juncus articulatus, Leucospora multifida, Polygonum glaucum, Yucca gloriosa.
2 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2008 | 1 |
| 2000 | 1 |
| 1987 | 1 |
| 1978 | 1 |