l-Ascorbic acid functions as a precursor of oxalic acid in several oxalate-accumulating plants. The present study extends this observation to include Rumex crispus L. (curly dock), Amaranthus retroflexus L. (red root pigweed), Chenopodium album L. (lamb's-quarters), Beta vulgaris L. (sugar beet), Halogeton glomeratus M. Bieb. (halogeton), and Rheum rhabarbarum L. (rhubarb). Several species with...

The objective of this work was to study the existence of a trade-off between aerenchyma formation and root mechanical strength. To this end, relationships among root anatomical traits and mechanical properties were analysed in plant species with contrasting root structural types: Paspalidium geminatum (graminaceous type), Cyperus eragrostis (cyperaceous type), Rumex crispus (Rumex type) and Pla...

Seven populations of Heterodera trifolii from Arkansas, Kentucky, Pennsylvania, and Australia plus 3 or 4 single-cyst isolates (SCI) from each population were tested for reproduction on seven species of plants to compare the host preferences among and within populations. Common lespedeza, Kummerowia striata cv. Kobe, was a good host for all populations and isolates. Therefore, a plant was consi...

Strobilanthes lamiifolia (Nees) T. Anderson is reported here as a new record for the flora of Vietnam. It morphologically allied to sulfurea but differs in shape leaf, bract, and bracteoles. Photographs line drawings are given together with information on habitat, ecology preliminary conservation assessment based IUCN criteria.

Summary The recently rediscovered Strobilanthes tubiflos (C.B.Clarke) J.R.I.Wood is fully described for the first time. A key and photographs are provided to enable identification of similar species found in north east India. rediscovery S. discussed context botanical exploration region implications conservation.