Table of Contents
Verkade, S.D. and G.E. Fitzpatrick. 1990. Development
of the threatened halophyte Mallotonia gnaphalodes as a new ornamental
crop. p. 470. In: J. Janick and J.E. Simon (eds.), Advances in new crops.
Timber Press, Portland, OR.
Development of the Threatened Halophyte Mallotonia gnaphalodes as a New Ornamental Crop
Stephen D. Verkade and George E. Fitzpatrick
Climatic and ecological adaptability coupled with desirability for use in
habitat restoration programs have increased consumer demand for rare and
endangered plant species. Certain of these species have great potential for
horticultural development once production barriers have been overcome. The
sea-lavender, Mallotonia gnaphalodes is very rare in nature, but
exhibits many desirable landscape characteristics. The recent delineation of
successful propagation procedures for sea lavender has provided an opportunity
for further economic development of this species.
Research has been conducted to determine optimum rooting conditions for
sea-lavender and to evaluate transplant procedures. Successful rooting of
cuttings was accomplished using fog propagation, 8,000 ppm indolebutryic acid,
and a well-aerated rooting medium. Optimum transplant success on nonirrigated
beach sites was achieved using organic topdressings composed of municipal solid
Armitage, A.M., J.M. Laushman, and F. Vogel. 1990. Photoperiodic control of
flowering of Salvia leucantha L. p. 470. In: J. Janick and J.E. Simon
(eds.), Advances in new crops. Timber Press, Portland, OR.
Photoperiodic Control of Flowering of Salvia leucantha L.
Allan M. Armitage, J.M. Laushman, and F. Vogel
Salvia leucantha, velvet sage, has potential as a cut flower crop grown
under protected environment or in the field. In the field, flowering naturally
occurs in August in north Georgia (34°N), and continues until frost. Yields of
Salvia leucantha in the field ranged from 250 to 330 stems per square
meter. Investigations were conducted to determine the response of Salvia
leucantha to photoperiod and to light drift. Macrobud development occurred
when the photoperiod was 12 hours or less but anthesis required photoperiods of
10 hours or less. A minimum of 14 SD cycles (8 hr) resulted in macrobud
development but at least 42 cycles were necessary for anthesis. Low irradiance
drift resulted in inhibition of macrobud development and anthesis. Inhibition
occurred when plants received more than 0.13 umoles m-2 s-1 irradiance from
2200 to 0200 hours.
Kitto, S. and P. Geiselhart. 1990. Regeneration and proliferation of
Veltheimia bracteata. p. 470. In: J. Janick and J.E. Simon (eds.),
Advances in new crops. Timber Press, Portland, OR.
Regeneration and Proliferation of Veltheimia bracteata
Sherry Kitto and Pamela Geiselhart
The common red-flowered, as well as the rarer yellow-flowered, forms of
Veltheimia bracteata would be valuable to the ornamental market if
available in large quantities. Conventional propagation techniques are slow;
however, rapid mass propagation may be possible via tissue culture. Red- and
yellow-flowered Veltheimia bracteata scape sections (0.5 cm
thick) and floral parts (ovary, immature seeds and bracts) have been cultured
on medium containing Murashige and Skoog (1962) salts and the following addenda
in mg/liter: sucrose, 60,000; nicotinic acid, 0.5; thiamine-HCl, 0.4;
pyridoxine-HCl, 0.4; glycine, 2; washed Difco Bacto agar, 6,000 and growth
regulators (NAA; 0, 1, 2, 4 and BA; 0, 1, 2). Cultures were maintained at
23±2°C with a 16 hour photoperiod (60 µmol m-2 s-1) and were recultured
every 4 weeks. Bulblets have been regenerated from scape sections and bracts.
Histological analysis has demonstrated that bulblets regenerate from callus.
Proliferating cultures have been established from regenerated bulblets.
Immature seeds have germinated to produce plantlets when cultured on growth
Last update March 21, 1997