DROSERA REGIA by Bob Ziemer, P.O

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DROSERA REGIA by Bob Ziemer, P.O. Box 4562, Arcata, CA 95521. When I first received my plant of Drosera I have been spraying and watering the pot regia from a friend, it was a small specimen about every 2 weeks with 1/10 strength and I grew the plant in a 4-inch pot under Hoaglands solution (a complete fertilizer) grow-lux bulbs in my house. During the first and occasionally spraying the leaves with summer, it grew reasonably well but put out fish emulsion. About 1/8 of the leaf surface only a maximum of 3-inch leaves. Last fall a of each leaf is covered with spiders, mos- large amount of salt (probably 10 grams) fell quitoes, and flies which have been trapped from a skunk skin I was curing into the pot of naturally. D. regia. By the time I observed this disaster, The plant is growing in an unshaded the plant had completely wilted and the greenhouse which is surrounded by red leaves turned black. I leached the plant and wood trees and at this time of year (May) sphagnum for 3 days in fresh water. Within receives about 3 hours of direct sunlight. two weeks, there was a new leaf emerging However, many of our days are overcast and but it only was 1-inch long. Later, the plant the light intensity is often low. Lighting is went dormant and the leaves were only supplemented with Vita-gro fluorescent 1/4-inch long with no tentacles. I did not lamps on a 12-hour photoperiod. The realize that these plants had a dormant greenhouse heater is set to go on at 45°F phase but it lasted from November to (70°C) and the vent fans go on at 85°F February. In mid-February, larger tentacled (29°C). Thus the plant receives cool nights leaves began to appear. I then transferred and warm days. The night temperature at the plant to a 10-inch plastic pot filled with this time of year will be about 50°F (10°C). live sphagnum moss. The plant is now Apparently, D. regia enjoys these conditions growing and routinely putting out 16 inch because it grows vigorous and healthy. (40 cm long) leaves. (Plates C & D). Carnivorous Plant Newsletter Volume 9 . March 1980 15 D. regia. Plate C. D. regia. Plate D. Photo by Jim Miller Photo by Jim Miller Carnivorous Plant Newsletter Volume 9 . March 1980 14 .

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Foraging Modes of Carnivorous Plants Aaron M
Israel Journal of Ecology & Evolution, 2020 http://dx.doi.org/10.1163/22244662-20191066 Foraging modes of carnivorous plants Aaron M. Ellison* Harvard Forest, Harvard University, 324 North Main Street, Petersham, Massachusetts, 01366, USA Abstract Carnivorous plants are pure sit-and-wait predators: they remain rooted to a single location and depend on the abundance and movement of their prey to obtain nutrients required for growth and reproduction. Yet carnivorous plants exhibit phenotypically plastic responses to prey availability that parallel those of non-carnivorous plants to changes in light levels or soil-nutrient concentrations. The latter have been considered to be foraging behaviors, but the former have not. Here, I review aspects of foraging theory that can be profitably applied to carnivorous plants considered as sit-and-wait predators. A discussion of different strategies by which carnivorous plants attract, capture, kill, and digest prey, and subsequently acquire nutrients from them suggests that optimal foraging theory can be applied to carnivorous plants as easily as it has been applied to animals. Carnivorous plants can vary their production, placement, and types of traps; switch between capturing nutrients from leaf-derived traps and roots; temporarily activate traps in response to external cues; or cease trap production altogether. Future research on foraging strategies by carnivorous plants will yield new insights into the physiology and ecology of what Darwin called “the most wonderful plants in the world”. At the same time, inclusion of carnivorous plants into models of animal foraging behavior could lead to the development of a more general and taxonomically inclusive foraging theory.
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