-M ortierella multidivaricata is described and placed in a new subgenus, Gamsiella, of M ortierella. It is distinguished from species of subgenus M ortierella in having repeatedly divaricately branched sporangiophores. Large numbers of sporangiola develop simultaneously on slender, attenuate pedicels arising from the ultimate branches of the sporangiophore. The sporangiole of M. multidivaricata...

Sections of mouse renal glomerulus fixed by perfusion with buffered osmium tetroxide solution have been studied with the electron microscope. Four components are recognized in the mouse glomerulus: epithelium, basement membrane, endothelium, and intercapillary cell. The three cellular components all display in their cytoplasm mitochondria, Golgi bodies, endoplasmic reticulum, and uncharacterize...

Recent phylogenetic evidence suggests that Cynoglossum (Boraginaceae), a cosmopolitan genus, is not monophyletic, but relationships among members of the genus remain uncertain. This is particularly the case for North American species of Cynoglossum. Utilizing DNA sequence data, a phylogeny has been reconstructed to investigate the evolutionary relationships among the New and Old World species o...

A comprehensive review of work pertinent to changes in the separation zone prior to abscission is presented. Since these changes are largely pectic in nature the involvement of pectic enzymes is suggested. The results obtained for the role of pectin methylesterase ( PME) in abscission arc as follows: ( 1 ) A localization of PME activity in the abscission zone of tobacco pedicels was established...

Correspondence to Rizaldy P. Scott: [email protected] Abbreviations used in this paper: ESL, endothelial surface layer; FP, foot pro­ cess; GBM, glomerular basement membrane; GEC, glomerular endothelial cell; GFB, glomerular filtration barrier; MC, mesangial cell; PEC, parietal epithelial cell; SD, slit diaphragm. The mammalian kidney orchestrates the excretion of metabolic wastes ...

THE role of androdioecy (the presence of male and hermaphrodite individuals in a breeding population) in the evolution of dioecy has long been the subject of much interest and discussion1-9. But no functionally androdioecious species has been previously documented2 and recent studies have even raised doubt about whether the phenomenon exists at all3. Although many cases of androdioecy have been...

INTRODUCTION Sesame (Sesamum indicum L., Pedaliaceae) is a very old cultivated crop and thought to have originated in Africa (Ram et al. 1990). However, Oplinger et al. (1990) have indicated it to be a highly prized oil crop of Babylon and Assyria about 4,000 years ago. The Chinese burned sesame oil for light and to make soot for their ink blocks. African slaves brought sesame seeds, which they...

(2811) Mollugo triphylla Burm. f., Fl. Ind.: 32. 1 Mar–6 Apr 1768 [Angiosp.: Mollugin.], nom. utique rej. prop. Lectotypus (hic designatus): India, [Coromandel: Nagapattinam], Outgaarden (G-PREL barcode G00808164). Gisekia L. is a small genus of its own family Gisekiaceae Nakai (Caryophyllales), which distributed mostly in Africa with extensions to West Asia. The number accepted species the var...

(2808) Acalypha supera Forssk., Fl. Aegypt.-Arab.: 162. 1 Oct 1775 [Angiosp.: Euphorb.], nom. utique rej. prop. Typus: non designatus. The name was established by Forsskål (Fl. 1775) means of a short description. In the protologue, he noted that his new species resembled A. indica L. (Sp. Pl.: 1003. 1753) but lacked bracts, which suggested might have fallen off. Forsskål's notes indicate saw pl...