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

2013 36 8-29 Hoe Yin Chen, Tung Lay Soon, Peter C. Boyce Studies on Homalomeneae (Araceae) of Borneo XIII – New Species of Homalomena (Buy)
ABSTRACT: Five new Homalomena species are described from Sarawak, Malaysian Borneo: H. baangongensis L.S.Tung & Y.C.Hoe, H. gastrofructa S.Y.Wong, Y.C.Hoe & P.C.Boyce, H. ibanorum S.Y.Wong & P.C.Boyce, H. passa S.Y.Wong & P.C.Boyce, and H. velutipedunculata S.Y.Wong, Y.C.Hoe & P.C.Boyce. Based on morphological characteristics they are assigned to the Giamensis Complex [H. baangongensis], Hanneae Complex [H. gastrofructa, H. velutipedunculata], and Borneensis Complex [H. ibanorum] of the Cyrtocladon Supergroup, and to the Selaburensis Complex [H. passa] of the Homalomena Supergroup. Keys to informal taxa of Bornean Homalomena, and to the species of the above mentioned species complexes are provided. All described novelties are illustrated from living plants, and a comparative plate of the spadix of the five described species of the Borneensis Complex is provided.

2013 36 30-55 Thomas B. Croat, E. J. Deal, Nicholas Russell, Carla V. Kostelac New Species of Anthurium (Araceae) from Central America (Buy)
ABSTRACT: A total number of 18 new species of Anthurium section Calomystrium are described as new to science: Anthurium alturaense Croat, A. breviapiculum Croat, A. cascajalense Croat, A. churchilleorum Croat, A. deminutum Croat, A. granulineare Croat, A. guanghuae Croat, A. haltonii Croat, A. henryi Croat, A. horridum Croat, A. ingramii Croat, A. kareniae Croat, A. laminense Croat, A. lilafructum Croat, A. luteospathum Croat, A. penonomense Croat, A. roubikii Croat, and A. suethompsoniae Croat.

2013 36 56-72 Thomas B. Croat, Ann Grace, Carla V. Kostelac New Species of Anthurium (Araceae) from Andean Western South America (Buy)
ABSTRACT: Eleven new species of Anthurium are described and illustrated: Anthurium aromoense Croat (sect. Digitinervium), A. banderasense Croat (sect. Pachyneurium), A. becerrae Croat (sect. Pachyneurium), A. betsyae Croat (sect. Porphyrochitonium), A. donovaniae Croat (sect. Digitinervium), A. imazaense Croat (sect. Pachyneurium), A. magrewii Croat (sect. Pachyneurium), A. paloraense Croat (sect. Pachyneurium), A. quinonesiae Croat (sect. Porphyrochitonium), A. riocojimiesense Croat (sect. Tetraspermium), and A. trujilloi Croat (sect. Pachyneurium). The species are from a broad area of the Andean South America from Colombia to Peru but six of the species: Anthurium aromoense, A. banderasense, A. donovaniae, A. magrewii, A. paloraense and A. riocojimiesense are from Ecuador, while A. becerrae, A. betsyae and A. imazaense are from Peru and A. quinonesiae, and A. trujilloi are from Colombia.

2013 36 73-86 Eduardo G. Gonçalves Five New Brazilian Species for the Tribe Caladieae (Araceae) (Buy)
ABSTRACT: Three new species of Xanthosoma (X. anisotomum E.G.Gonc¸., X. pedatisectum E.G.Gonc¸. and X. rubrispathum E.G.Gonc¸.) and two new species of Caladium (C. intermedium E.G.Gonc¸. and C. amazonicum E.G.Gonc¸.) are described. These new species are all illustrated and compared to their closest relatives. Caladium intermedium is noteworthy in appearing intermediate between Caladium and Scaphispatha, turning the boundaries between both genera rather complex.

2013 36 87-92 Wilbert L. A. Hetterscheid, Cyrille Claudel Three New Species of Amorphophallus (Araceae) from Indochina (Buy)
ABSTRACT: Three new species of Amorphophallus (Araceae) from Cambodia, Laos, and Vietnam, Amorphophallus hemicryptus Hett. & Maxw., Amorphophallus nicolaii Hett. and Amorphophallus pulchellus Hett. & Schuit., are described and compared to their phylogenetically closest relatives or morphologically most similar species.

2013 36 93-97 Wilbert L. A. Hetterscheid New Typhonium Species from Asia (Buy)
ABSTRACT: Two new species of Typhonium (Araceae) are described, T. corrugatum Hett. & Rybkova and T. ramosum Hett. and compared to their morphologically closest relatives.

2013 36 98-103 Peter C. Boyce Studies on Schismatoglottideae (Araceae) of Borneo XXIX—Piptospatha manduensis— The Ultimate Aroid Calciphile? (Buy)
ABSTRACT: Piptospatha manduensis A. Hay & Bogner is highlighted as a truly calciphilous aroid obligated to travertine in north eastern Indonesian Borneo. Based on new collections and cultivated plants an updated description is offered. A brief overview of the other very few calciphilous aroids in Borneo is presented, and, together with P. manduensis, all are illustrated.

2013 36 104-113 Wilbert L. A. Hetterscheid, Josef Bogner Recent Observations and Cultivation of Pseudohydrosme gabunensis Engl. (Araceae) (Buy)
ABSTRACT: Fruiting behaviour and morphology of Pseudohydrosme Engl. are presented for the first time. Also a unique way of vegetative propagation, hitherto unknown in any member of the Araceae family, is presented. Cultivation requirements of P. gabunensis Engl. are given. Additional morphological data of the species are presented.

2013 36 114-122 Cyrille Claudel, Alan Galloway, Ralph D. Mangelsdorff Hybridization of Amorphophallus—State of Affairs (Buy)
ABSTRACT: To follow-up the article in ‘Aroideana’ vol. 35, we want to document further attempts and progress in hybridizing Amorphophallus. We present more new crosses which have been successfully undertaken recently. Amongst them: Amorphophallus boyceanus 3 Amorphophallus ‘John Tan’ (see ‘Aroideana’ 35), the first Amorphophallus hybrid involving three species. Furthermore we have some general observations made on the first generations of hybrids so far.

2013 36 123-128 Hoe Yin Chen Pothoidium – Neglected, But Not Forgotten? (Buy)
ABSTRACT: Pothoidium, the only functionally dioecious climbing aroid, is presented and the sole species, P. lobbianum, is illustrated from living plants and with two plates from classic aroid literature. A plea is made for heightened interest in cultivating this and other Asian climbing aroids.

2013 36 129-131 LariAnn Garner Notes on Philodendron adamantinum Mart. ex Schott (Araceae)
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ABSTRACT: Members of the Philodendron subgenus Meconostigma are popular in the horticultural industry. While the most common species seen in cultivation is Philodendron bipinnatifidum Schott ex Endl. (also known in the trade as Philodendron selloum), there are many other horticulturally desirable species in this subgenus. In my hybridizing work with these plants, I’ve had the opportunity to obtain and grow some of the rarer species. Among them is Philodendron adamantinum, a plant that in appearance resembles a diminutive version of P. bipinnatifidum, but with several crucial differences.

2013 36 132-135 Jonathan Ertelt An Excellent Aroid for Teaching – Anthurium fatoense (Buy)
ABSTRACT: On one such collecting trip I saw a plant growing in lowland wet forest outside BriBri in the province of Limo´n, Costa Rica which I knew to be special. It was growing about 5 feet off the forest floor on the trunk of a fairly small tree, the trunk only a couple of inches in diameter. It looked like a small bird’s nest type Anthurium, but with an elongated stem such that the plant wrapped around the tree in a slow spiral (Plate 1 A). There was a certain grace to the whole growth habit. But what appealed to me even more were the clusters of roots growing out from the stem at each node, just above the leaf (Plate 1 D). It was such a perfect example of a trash basket root system (tufts of vertical roots that trap debris from above, which leach out nutrients with each rain for the roots to absorb, and also holds moisture) – so ready for use as a teaching tool. I collected the plant, and thorough cleaning, and paperwork all in order, allowed it to come back with me. Two pieces both put out new roots and new shoots, and were mounted onto trees in rain forest simulations of the two institutions that had contributed to my travel.

2013 36 136-145 M. Nedunchezhiyan, M. Sankaran Cormels and Minicorm Sett Techniques for Seed Corm Production in Amorphophallus (Buy)
ABSTRACT: Amorphophallus paeoniifolius is a widely grown food crop in the Indian subcontinent, Southeast Asia and China. The crop is grown by planting corms or corm segments, with whole corms of 500–750 g weight the preferred material. A shortage of planting material of this size is a constraint for commercial cultivation and increasing maximum food production. Research is reported on methods of producing corms of this size from cormels and planting setts. Results differ regionally and optimum combinations in plant spacing and fertilization have been developed to account for varying soil and climatic conditions.

2013 36 146-147 LariAnn Garner A New Meconostigma Philodendron Hybrid
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ABSTRACT: In the late 1980s, I was driving through Coral Gables, Florida, and spotting an unusual philodendron plant, I stopped to examine it. The plant was being grown in a front yard, as a hedge! The owner was trimming his ‘‘hedge’’ and on closer inspection I realized that this plant was a meconostigma philodendron, as it had blooms at the time. This plant showed several distinctive characteristics that aroused my interest, not the least of which was the fact that it had a natural branching and dwarf-growing habit when compared to more well-known meconostigma philodendrons. I asked the owner for some ‘‘clippings’’ and that was how I acquired what I now refer to as Philodendron ‘‘Coral Gables Dwarf’’. I am confident that it is an undescribed species that the owner might have brought back from his home country in South America, although I did not discuss the origin of the plant with him. Confirmation of this will have to await further taxonomic study of this plant.

2013 36 148-153 Brian Williams A New Series of Colocasia hybrids (Araceae) (Buy)
ABSTRACT: Colocasia gigantea is a unique and largegrowing plant in the Araceae. The species is found native in tropical parts of Asia such as China, Thailand, and Borneo. The petioles (often, but incorrectly, called stems) are used by natives as a food source. Villagers with poor soil use this plant to feed livestock.

2013 36 154-158 Brian Williams Alocasias for the Garden and House (Buy)
ABSTRACT: Alocasias have long been a staple in gardens and tropical displays. The most commonly used species are Alocasia odora, often mistakenly sold as Alocasia macrorrhizos, although that species properly named is also on the market

2013 36 159-161 LariAnn Garner A Simple Solution That May Just Bring Plants to Life
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ABSTRACT: For most fanciers, growing aroids involves a pot, potting mix, water, fertilizer, the right amount of light and the right temperature. While all of these are essential elements of growing, there are often details in applying each one that can make the difference between success in growing and the rapid loss of a plant. No one would argue that a temperature that is too cold can result in the loss of a plant, but I have found that there are other, more subtle, details in many factors that can change a plant that is just barely hanging on into a thriving, happy specimen.

2013 36 162-170 Cyrille Claudel Amorphophallus in the Hamburg Botanical Garden (Buy)
ABSTRACT: The Hamburg Botanical Garden is one of the largest (24 hectares) and most valuable gardens in Germany and houses special collections in its non-public greenhouses. Among these is the Amorphophallus collection which is in large part based on the former research collection of W. L. A. Hetterscheid and has been introduced and expanded by myself in Hamburg. It comprises nearly 130 species of Amorphophallus and related genera represented by some 1,000 accessions. Such a living treasure needs care and attention as it is the base for future research and investigation. In parallel, representative material needs subsequently to be transferred into a herbarium collection.

2013 36 171-181 Eduardo G. Gonçalves, Artur Campos Da´lia Maia, Silvio P. Dos Santos, Roseane Rodrigues de Almeida, Ma´rcia Nascimento The Living Aroid Collection at the Horto Botaˆnico of Universidade Cato´lica De Brası´lia (HBUCB) - Brazil (Buy)
ABSTRACT: The Horto Botaˆnico of Universidade Cato´ lica de Brası´lia (HBUCB) has been a centre for studies on aroids ever since it was established in 2004. In little over eight years it has amassed a comprehensive living aroid collection that now holds 53 genera and 317 species, many of which are only rarely cultivated (e.g. Scaphispatha, Philonotion, Lorenzia, Bognera). The collection also includes an important assemblage of at least 30 accessions that are clones of type material. The access to live specimens in a controlled environment facilitated research on molecular biology, chemical ecology, horticulture and conservation. This article aims to briefly present the Horto Botaˆnico of Universidade Cato´- lica de Brası´lia as a successful case of an active living plant collection in a developing country.

2013 36E(1) 4-17 Peter C. Boyce Studies on Schismatoglottideae (Araceae) of Borneo XXXIII ? A review of the Schismatoglottis Tecturata Group, including description of a new species, Schismatoglottis evelyniae (Read)
ABSTRACT: Schismatoglottis evelyniae P.C.Boyce & S.Y.Wong is described as a taxonomically new species in the Tecturata Group, morphologically most similar to Schismatoglottis platystigma M.Hotta and S. petri A. Hay. Schismatoglottis evelyniae, S. platystigma, S. petri, and S. tecturata are illustrated from living plants. A key to the species of the Schismatoglottis Tecturata Group is provided.

2013 36E(1) 16-70 Thomas B. Croat, James J. Grib, Carla V. Kostelac New Species of Philodendron (Araceae) from South America (Read)
ABSTRACT: Nineteen new species of Philodendron subgenus Philodendron are described and illustrated: P. alonsoae Croat, P. atratum Croat, P. attenuatum Croat, P. caracaraiense Croat, P. caranoense Croat, E. Trujillo & M. Correa, P. davidneillii Croat, P. edwinii Croat & M. Correa, P. genevieveanum Croat, P. grahamii Croat, P. gribianum Croat, P. macarenense Croat, P. marcocorreanum Croat, M. Mora & E. Trujillo, P. linganii Croat, P. meieri Croat, P. pseudoverrucosum Croat, P. ricaurtense Croat, P. sanmarcoense Croat, P. schmidtiae Croat and P. werneri Croat. The new species occur in areas throughout the continent of South America with one species from Brazil, seven from Colombia, three from Ecuador (one of which is likely eventually to be found in Peru, while another may be found to occur in Colombia), five from Peru (one of which might be found in Ecuador), one species ranges from Colombia to Ecuador, three range from Ecuador to Peru and one from Venezuela.

2013 36E(1) 71-75 Thomas B. Croat, Andreas Gr?eger Anthurium chamberlainii Masters (Araceae) Rediscovered (Read)
ABSTRACT: Anthurium chamberlainii Masters, a species described from unknown origin in the late 19th Century is fully redescribed and illustrated providing assurance that the species does indeed originate in Venezuela. A modern and detailed description as well as illustrations are provided. The species is a member of section Belolonchium.

2013 36E(1) 76-91 Julio Andrés Sierra-Giraldo, David Sanin, Luis Fernando Coca, Juan Mauricio Posada-Herrera Araceae in a High Andean Forest of the Colombian Occidental Cordillera (Natural National Park Tatam (Read)
ABSTRACT: Colombia represents the highest register of Araceae species by area. However, across the country there is a high sampling bias, with records especially lacking in the Andes and the biogeographic region of Choc?. Therefore, a study of the aroids was developed in the oriental slope of the Colombian Western Cordillera in the Natural National Park Tatam? using plots every 200m in an altitudinal range between 2400 ? 3000m asl. Two genera (Anthurium and Chlorospatha) and 14 species were recorded. Of these 71.42% had a terrestrial habit, 21.43% were hemiepiphyte and 7.14% epiphyte. The genus with the largest number of species (12) and the widest distribution was Anthurium. One species, Anthurium longegeniculatum, was present through all the altitudinal gradient studied. The highest species diversity was found in the plots located between 2400 ? 2600 m. The known distribution of nine species of Anthurium and two species of Chlorospatha is enlarged in the Natural National Park Tatam?. These results highlight the fact that it?s necessary to increase the sampling and the floristic researches on Araceae, due its complexity, high diversity and endemism in the Neotropics, especially in the Andes.

2013 36E(1) 92-98 Thomas B. Croat, Joep Moonen, Juan Mauricio Posada-Herrera Philodendron joaosilvae , a New Species of Philodendron, subgenus Philodendron, section Philodendron (Araceae) from Brazil (Read)
ABSTRACT: A species of Philodendron, subgenus Philodendron, section Philodendron (Araceae) from Brazil, Philodendron joaosilvae Croat, A. Cardoso & Moonen is described as new.