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70(435)1-7 (PDF/A 383 KBytes) published online: August 25 2020 Some Notes on the Spectacular Guzmania testudinis
Eric GoudaLyman B. Smith and Robert W. Read (1979) described Guzmania testudinis from an incomplete specimen in Phytologia with a short description and a picture of the herbarium specimen of the type from Choco, Colombia at 2000 m elevation. More specimens were collected after that, from two more provinces in Colombia and 5 provinces in Ecuador. Harry E. Luther (1992) described a new color variety Guzmania testudinis var. splendida from Esmeraldas, Ecuador, with the note ?This new variety differs from var. testudinis from further north in Ecuador to Colombia by having longer inflorescence branches that much exceed the primary bracts and white (not yellow) sepals and petals?.
69(3)1-6 (PDF/A 603 KBytes) published online: May 13 2020 A study of Aechmea longicuspis versus Aechmea kuntzeana
Eric GoudaThere are a few Aechmea species with a long black terminal spine over 1 cm long on the floral bracts. The most commonly collected and well-known species is Aechmea setigera Mart. ex Schult. & Schult.f. (1830) a plant that usually has a horizontal inflorescence. Two others are Ae. longicuspis Baker (1889) and Ae. kuntzeana Mez (1896) that normally, but not always, have upright inflorescences. There is much confusion concerning the identification of species within this group. For example, in Baensch (1994) on page 51 we see an Ae. setigera-like plant with an upright inflorescence identified as Ae. longicuspis, but the open long cylindric inflorescence with the dendriform elongated sterile endings is typical of Ae. setigera that apparently can also have a nearly upright inflorescence.
69(pp.10) (PDF/A 502 KBytes) published online: May 13 2020 Natural hybrids of Tillandsia argentina
Eric GoudaSome Tillandsia species easily form hybrids with other Tillandsia species and some likeTillandsia complanata Bentham (1846) even hybridize with species of other genera.Tillandsia argentina Wright (1907) is one that easily forms hybrids with other species.So probably there is a lack of physiological barriers between this and other species thatprobably did not occur in the past in the same distributional area. It is known thatunrelated Tillandsia species that do not grow in the same area can easily be crossedwith each other, because there are no physiological or biotic or abiotic barriers whichare needed to avoid hybridizing. As biotic factors you can think of pollinators thatdo not visit both species or different flowering time during the year, and as an abioticfactor different elevation.
69(2c pp. 5) (PDF/A 3227 KBytes) published online: April 22 2020 Airplant Aerialists on the High-Wire
Bruce HolstCircus tightrope artists do their best to remain in contact with the wire -- their goal is staying alive while making a living and entertaining crowds. With tightrope plant artists, their goal is finding a niche to grow and reproduce. Bromeliads are masters of the high-wire, and to my knowledge, the only group of vascular plants that can maintain a perch on wire lines high in the air well enough to flower and set seeds that then drift on the air currents to new perches, be-it wire or wood. The Tillandsioideae are the best skilled aerialists, being mostly represented on high wires by atmospheric tillandsias or air-plants, though small tank-forming species of Tillandsia and Catopsis have also been observed on wires.
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