Journal Vol 77-6

November - December 2005

 

Contents

  • Under Discussion Thelocactus, Fred Dortort
  • Succulent and xeromorphic bromeliads of Brazil Part 1Dyckia marnier-lapostollei L. B. Smith, Pierre J Braun & Eddie Esteves Pereira
  • From Prickly Pear to Dragon Fruit The changing face of cactus-fruit growing, Gavin Hart
  • Glass Cacti, D Russell Wagner
  • Nevadagascar? The threat that invasive weeds and wild-fires pose to our North American desert biomes, Part 1: The Mojave Desert and Joshua Tree woodlandsJan Emming
  • The rediscovery of Aloe fimbrialis and an amplified description, Graham Williamson
  • Succulents on Stamps Asclepiads, Part 2, Peg Spaete
  • Volume 77 Index

 

On the cover. Gerhard Marx's cover painting depicts Tylecodon nolteeiLavranos, a beautiful dwarf species endemic to a small area in the middle of the Knersvlakte in the winter rainfall region of South Africa. Flattish marbled leaves distinguish it from T. occultans, which has deep green, pillow-like leaves, completely unmarked and (usually) only sparsely fuzzy.Tylecodon occultans is known from Bitterfontein and Komkans, points lying north and west of T.nolteei's habitats. We know two of the latter: the type locality-shaded rocky shelflets on the crest of a shale hill near Rooiberg-and the flats around Grootgraafwater to the south. Plants in the flats experience a harsher exposition and are permanently stunted, so much so that they are essentially stemless and in that respect resemble the potato-like T. occultons, with which they have often been confused. The stem-forming T. nolteei grown and painted by Marx is from the type locality. Plants at that locality vary from a vague mottling to full Gorbachevian birthmarks; the glistening green markings also vary from year to year. The flowers, however, are stable, with red candy stripes on the outside of their ivory corolla-tubes. Plants flower in summer and shed seed by early autumn.

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