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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.
69(2b pp. 6) (PDF/A 4767 KBytes) published online: March 19 2020 Guzmania bismarckii Rauh vs. Guzmania lindenii (Andre) Mez
Eric J. GoudaGuzmania bismarckii Rauh (1984a) was based on material found in 1980 near Riojain Moyobamba, Northern Peru. Rauh noted the material was closely related to G.lindenii (Andre) Mez (1896) and determined it ranked as a new species because itwas sufficiently different to G. lindenii plants he had seen in Oxapampa. My workshows that the Moyobamba material is closer to the type of G. lindenii than Rauh's Oaxapampa plants are.See also Rauh (1984b), Moore (1995) and Bismarck (1997).Werner Rauh (1983) published pictures of plants he identified as Guzmania lindenii,collected in the Oxapampa area, that are showing a more divided inflorescencewith more slender (cylindric) spikes than shown in the so-called Morren Icon (fig. 1,Schlumbergeria lindeni (Andre) E.Morren 1883). Contrary to what Rauh wrote, thetype of Guzmania lindenii is also from N. Peru and not from the Oxapampa area andthe Morren icon is showing a plant that is more like the Moyobamba specimen (thetype of Guzmania bismarckii) than the Oxapampa one. I concluded that Guzmaniabismarckii Rauh should be considered a synonym of G. lindenii (Andre) Mez (1896).
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