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Your search for articles mentioning the genus Dieffenbachia has found 28 articles.

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Year Vol.
(Issue) Pages Author(s) Title

1978 1(1) 11-12 Michael Madison On the names of aroids
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ABSTRACT: It would seem useful in this first issue to clarify some aspects of the naming of plants. The latin name of a plant species consists, technically, of three parts which appear in the following order: first the genus, which is capitalized, ego Philodendron; followed by the species, which is not capitalized, ego giganteum; followed by the name of the person who first described the species, in this case H. W. Schott. So the name of this West Indian species is Philodendron giganteum Schott. In orticultural literature the author's name is often omitted.

1978 1(2) 31-53 Michael Madison The genera of Araceae in the northern Andes (Buy)
ABSTRACT: The north Andean region, which includes Colombia, Ecuador, and Peru, has perhaps the richest flora in the world and is the center of diversity of the family Araceae. The low to middle elevation wet forests of the area abound with aroids which cover the ground, climb up tree trunks, and as epiphytes adorn the outer branches of the trees. Many of our finest ornamental aroids, including Anthurium andreanum, A. crystallinum, Caladium bicolor, and Philodendron erubescens, are derived from this area. The purpose of this paper is to provide a key and brief descriptions of the genera of Araceae of the northern Andes which should enable anyone to identify to genus aroids from the region. The key is also applicable in Central America, but only partly so in the rest of South America where a number of additional genera, principally of the subfamily Aroideae, are found.

1979 2(2) 52-61 Michael Madison Protection of developing seeds in neotropical Araceae (Buy)
ABSTRACT: In flowering plants with animal pollination and seed dispersal the reproductive cycle can be considered to consist of four stages, representing alternating phases of protection and display. In the protective phases immature flowers and fruits are safeguarded from predation and parasitism, while in the display phases pollinators and dispersal vectors are attracted. This alternation of protection and display is accomplished by a variety of mechanisms.

1979 2(3) 67-77 Michael Madison Notes on some aroids along the Rio Negro (Buy)
ABSTRACT: In the fall of 1978 I spent several months collecting plants along the Rio Negro in the western Amazon in connection with the Projecto Flora Amazonas, an ambitious undertaking to prepare a new flora of the Amazon. Although my chief research interests on this expedition were not directed to aroids, I was able to make observations and collections of a number of species.

1980 3(1) 13-18 Mark D. Moffler Qualitative observations on tropical aroid cold tolerance (Buy)
ABSTRACT: As winter approaches each year, we all become concerned about protecting our tropical plants, especially those which are the most susceptible to cold damage. The fall of 1978 was mild in Tampa, with temperatures seldom reaching below 100C (500F). The mild fall gave many of us a false sense of security and steps for cold protection were put off until "tomorrow". It wa~ this unfortunate procrastination that lead to a premature study of cold tolerance in aroids. My initial idea was to test several landscape and porch plants for cold susceptibility, but unfortunately, I unintentionally tested 46 different aroids.

1980 3(2) 39-48 Fred Dortort In the forests of Costa Rica (Buy)
ABSTRACT: Not long ago we had the opportunity to travel in Costa Rica for several weeks. We wanted to observe various tropical plants in their habitats, and we hoped that Costa Rica would be a good choice for our project. Aroids were one of the main groups we were looking for, and we found a large number of them.

1980 3(2) 62-64 Marianne Knecht The uses of Araceae in African folklore and traditional medicine
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ABSTRACT: In many countries of Africa much effort is now being put into research on medicinal plants, and accounts already exist which list those species that are used in some form or other in traditional African medicine. However, these accounts do not include the personal observations of botanists, who have gathered valuable information from local people during the course of their fieldwork. The following summary includes statements that I have obtained during my own field tours in Ivory Coast in West Africa.

1980 3(2) 65-68 R. J. Henny, Eleanor M. Rasmussen Growing and breeding Dieffenbachia (Buy)
ABSTRACT: At the Agricultural Research Center - Apopka we have been studying the breeding potential within the genus Dieffenbachia. One goal of this program is the development of new and better varieties of Dieffenbachia for commercial production in Florida. Another important objective is to study the reproductive mechanisms of fJieffenbachia and learn more of their biology and how it relates to all tropical plants in general and other aroids in particular. Such studies include research into factors affecting plant growth, flowering, pollen and seed production and storage and inheritance of various plant characteristics (leaf and petiole variegation, growth habit, etc.).

1980 3(3) 94-95 R. J. Henny, Eleanor M. Rasmussen Producing Dieffenbachia from seeds
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ABSTRACT: Although the flower structure and pollination method are known (1), difficulty in obtaining seed from selected crosses is a major reason that few hybrid Dieffenbachia exist. However, recent studies at the Agricultural Research Center - Apopka concerned with environmental factors affecting seed production in Dieffenbachia have led to greatly improved seed yields and made hybrid production easier.

1980 3(3) 96-97 R. J. Henny, Eleanor M. Rasmussen Stimulation of flowers in Dieffenbachia
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ABSTRACT: Dieffenbachia breeding has been hindered by sporadic flowering and the small number of inflorexcences per plant. In attempting to surmount this problem we initiated experments to see if it would be possible to control flowering using the plant hormone gibberellic acid (GA3,. The study was conducted on full-sized plants of Dieffenbachia maculata 'Perfection' grown in 6-inch pots. Treated plants were sprayed on their upper and lower leaf surfaces until runoff with either 250, 500 or 1000 parts per million GA3 while control plants were sprayed with water only. Ten plants were tested at each of the four GA3 levels and plants were maintained in a greenhouse held at 65-90oF temperature range. GA 3 was tested because it had previously been shown to induce flowering in many crops as well as some aroids (1,2,3,4).

1982 5(2) 47-59 Michael H. Grayum The aroid flora of Finca La Selva (Buy)
ABSTRACT: Costa Rica is a small Central American nation about the size of Denmark, with a remakable array of climatic regimes, and altitudes ranging from sea level to nearly four thousand meters. One can ascend from semidesert scrub forests on the Pacific slope, up through sodden cloud forests to pa'ramo (a kind of a high altitude chaparral) on the highest peaks, and down again on the Caribbean slope, through alders, elms and oaks, to humid lowlands and rain forests. The plants growing in this multifaceted domain are incredibly diverse, even by tropical standards. Costa Rica boasts nearly twenty-five percent more species of dicots, for example, than the lush tropical isle of Java, and nearly two and a half times as many species of dicot epiphytes (Burger, 1980) - this despite the fact that Java is two and a half times larger than Costa Rica and has yielded fifty percent more herbarium specimens per unit area (Prance., 1978).

1982 5(3) 67-88 Dan H. Nicholson Translation of Engler's classification of Araceae with updating (Buy)
ABSTRACT: When Hooker (1883) was preparing the treatment of Araceae (Aroideae) for the monumental 'Genera Plantarum,' he basically followed the Schottian system, incorporating Engler's (1879) reduction in the number of genera. The first system was "popularized" by Hutchinson (1959) who, with a reversal of the sequence (bisexual genera first), published essentially an English translation of Hooker's latin. Engler (1905-1920), in his monumental 'Das Pflanzenreich', produced his final treatment of the family, including all then known species in nine volumes. This work remains the standard reference for the family as a whole.

1982 5(4) 103-107 David Burnett The problems of names for Araceae: A proposal for hybrid and cultivars (Buy)
ABSTRACT: There are internationally accepted rules for naming plants at all of these levels. Further there are rules for naming hybrids between Genera (there are probably no known intergeneric hybrids in Araceae): Hybrids between species and hybrids between cultivars. Generally species hybrids are to be named by a formula (and, if appropriate, a name) and hybrids between cultivars by a name along the lines of cultivars. What I propose in this article is that we must depart, slightly, from the rules of the Code. What I regard as two slight departures may seem, to some, as major. This is a matter for the members to decide.

1982 5(4) 107-109 R. J. Henny Dieffenbachia breeding: Transmission of foliar variegation to hybrids
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ABSTRACT: Although Dieffenbachia hybrids have been reported from the late 1900s (1), nothing has been published concerning the inheritance of foliar variegation. Recent information concerning growth (2), control of flowering (4), and inducement of maximum seed set (3) has made Dieffenbachia breeding much more feasible.

1982 5(4) 110-111 R. J. Henny Dieffenbachia breeding: Presence of fertility and sterility in parents and their hybrids
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ABSTRACT: The single remaining barrier to hybridization involves sterility in collected stock plants or in naturally and artificially produced hybrids. Knowledge of the fertility or sterility of parental plants to be used in a breeding program, as well as their subsequent hybrids, is critical to anyone interested in pursuing Dieffenbachia breeding. This paper is a summary of results obtained at the Agricultural Research Center-Apopka regarding fertility and sterility of 34 breeding lines of Dieffenbachia and their hybrids.

1982 5(4) 116-121 Robert R. White Panama west (Buy)
ABSTRACT: As Las Cruces lies only a few miles from the border of Panama, the plants found in the adjacent Panamanian highlands are just as much a part of our local flora as are those of Costa Rica. Therein lay the opportunity for two most enjoyable collecting trips to Panama.

1983 6(1) 9-11 Father Eugene Middendorf The remarkable shooting idioblasts
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ABSTRACT: The ejection of sharp, needlelike crystals from specialized spindleshaped cells of the plant Dieffenbachia is a phenomenon that deserves more attention from biology teachers and, perhaps researchers. Students are fascinated when they see these distinctive cells (idioblasts) shoot out needle after needle like some kind of automatic microscopic blowgun. But the performance and structure of these achlorophyllous cells should be used for more than just laboratory entertainment.

1986 9(1) 3-213 Thomas B. Croat, Nancy Lambert The Araceae of Venezuela (Buy Back Issue)
ABSTRACT: An illustrated treatment of 171 Venezuelan Araceae taxa is provided. Discussion of range, species characteristics and distinction from similar or closely related species is made for each taxon. Sixteen species, three subspecies and one variety are described as new, and three new combinations are made.

1987 10(2) 4-16 Josef Bogner Morphological variation in aroids (Buy)
ABSTRACT: The Araceae or aroid., are a large family of about 2400 species, grouped in 107 genera and these again in nine subfamilies. The aroids are mainly a tropical family and are distributed world-wide. They show great variation in their morphological characters, which will be described in this paper along with some other data.

1987 10(2) 17-19 R. Hegnauer Phytochemistry and Chemotaxonomy of the Araceae
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ABSTRACT: Many Aroids taste painfully acrid and are toxic. Nevertheless the family yields a number of tropical food crops and many ornamental plants. Phytochemistry and chemotaxonomy of Aroids is discussed.

1988 11(3) 4-55 Thomas B. Croat Ecology and life forms of Araceae (Buy Back Issue)
ABSTRACT: The most interesting aspect of the family's ecology is the diversity of adaptive life forms. These range from submerged to free-floating, and emergent aquatics to terrestrial plants and to epilithic or epiphytic forms which may be true epiphytes or hemiepiphytic (growing on trees but rooted in soil). Hemiepiphytism is diverse itself, with some species beginning their lives as terrestrial seedlings, then growing skototropically (toward darkness) until they arrive at the nearest suitable tree ( usually a relatively large one which casts a darker shadow) where a physiological change takes place allowing them to grow toward light (Strong & Ray, 1975). They grow as appressed epiphytes on trees or as vines in the canopy. Others begin their lives as true epiphytes, some reconverting to hemiepiphytes by producing long, dangling roots contacting the forest floor below.

1993 16 37-46 Gitte Peterson Chromosome numbers of the genera Araceae (Buy)
ABSTRACT: An overview of the chromosome numbers of the genera of Araceae is given.

1994 17 33-60 Thomas B. Croat Taxonomic status of neotropical aroids (Buy)
ABSTRACT: While the Paleotropics has more genera than the Neotropics (60 versus 36) the latter area contains roughly twothirds the species of the world's Araceae. Our level of knowledge of the systematics of the neotropical Araceae varies greatly from area to area, owing largely to recent revisionary work or to the interest and area concentrated on by particular workers.

1998 21 26-145 Thomas B. Croat History and current status of systemic research with Araceae (Buy Back Issue)
ABSTRACT: This paper will cover all systematic and floristic work that deals with Araceae which is known to me. It will not, in general, deal with agronomic papers on Araceae such as the rich literature on taro and its cultivation, nor will it deal with smaller papers of a technical nature or those dealing with pollination biology. It will include review papers on technical subjects and all works, regardless of their nature, of current aroid researchers. It is hoped that other reviews will be forthcoming which will cover separately the technical papers dealing with anatomy, cytology, physiology, palenology, and other similar areas and that still another review will be published on the subject of pollination biology of Araceae and the rich literature dealing with thermogenesis.

1999 22 63-71 Danny N. Beath Dynastine scarab beetle pollination in Dieffenbachia longispatha (Araceae) on Barro Colorado Island (Panama) compared with La Selva Biological Station (Costa Rica) (Buy)
ABSTRACT: The aim of this study was to evaluate the differences between two flowering populations of Dieffenbachia longispatha; one on Barro Colorado Island, Panama and the other at La Selva Biological Station, Costa Rica. The Barro Colorado population exhibited green spathes and 10-15 loosely packed bright orange female florets in the lower spadix zone, compared to the La Selva populations, which had slightly larger yellow-green spathes and 40-50 densely packed yellow female florets in the lower spadix zone. Other differences included floral odor, which was sweet and spicy in the Barro Colorado population and rancid smelling on La Selva plants, together with numbers, species and timings of beetle visitors. On Barro Colorado the dominant beetle visitors were Cyclocephala gravis and Cyclocephala sexpunctata compared to Cyclocephala amblyopsis and Cyclocephala gravis at La Selva. In conclusion, the effects of selection by the local beetle populations in each locality appears to have led to the evolution of different sub-species of D. longispatha on Barro Colorado Island in Panama and at La Selva Biological Station, Costa Rica.

2008 31 3-14 Josef Bogner The genus Bognera Mayo and Nicolson (Araceae) (Buy)
ABSTRACT: The genus Bognera Mayo & Nicolson with its single species Bognera recondita (Madison) Mayo & Nicolson, is described and illustrated and its relationships are discussed in detail. Discussions of its history, discovery, distribution, ecology, pollination, etymology and cultivation are given. The genus Bognera is characterized by its creeping rhizome shoot architecture with two cataphylls preceding each foliage leaf, the last one partly enveloping the petiole (a character unique in the family), the essentially parallel-pinnate venation type (philodendroid) but with third order veins in a clearly reticulate pattern, the unconstricted spathe, the stamens of each male flower connate into a synandrium, the female flowers lacking staminodes, the unilocular ovary with a single anatropous ovule on a basal placenta and the inaperturate pollen grains with smooth (psilate) exine.

2008 31 113 Josef Bogner The chromosome numbers of the aroid genera: An additional note
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ABSTRACT: Last year we (Bogner & Petersen, 2007) published a list of the chromosome numbers of the aroid genera, but one genus, Croatiella E. G. Gons,:.(Gons,:alves, 2005), was lacking, because earlier living plants disappeared from cultivation. As expected, Croatiella integrifolia has also a chromosome number of 2n = 34, x = 17

2009 32 30-122 Thomas B. Croat, Pu Huang, J. Lake, Carla V. Kostelac Araceae of the flora of Reserva La Planada, NariÃ±o Department, Colombia (Part 1) (Buy Back Issue)