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Origin and radiation of the earliest vascular land plants

(2009) Science. 324. p.353-353
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Abstract
Colonization of the land by plants most likely occurred in a stepwise fashion starting in the Mid-Ordovician. The earliest flora of bryophyte-like plants appears to have been cosmopolitan and dominated the planet, relatively unchanged, for some 30 million years. It is represented by fossilized dispersed cryptospores and fragmentary plant remains. In the Early Silurian, cryptospore abundance and diversity diminished abruptly as trilete spores appeared, became abundant, and underwent rapid diversification. This change coincides approximately with the appearance of vascular plant megafossils and probably represents the origin and adaptive radiation of vascular plants. We have obtained a diverse trilete spore occurrence from the Late Ordovician that suggests that vascular plants originated and diversified earlier than previously hypothesized, in Gondwana, before migrating elsewhere and secondarily diversifying.

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Chicago
STEEMANS, Philippe, Alain LE HÉRISSÉ, J. MELVIN, Merrell MILLER, Florentin Paris, Jacques Verniers, and C.H. Wellman. 2009. “Origin and Radiation of the Earliest Vascular Land Plants.” Science 324: 353–353.
APA
STEEMANS, P., LE HÉRISSÉ, A., MELVIN, J., MILLER, M., Paris, F., Verniers, J., & Wellman, C. H. (2009). Origin and radiation of the earliest vascular land plants. Science, 324, 353–353.
Vancouver
1.
STEEMANS P, LE HÉRISSÉ A, MELVIN J, MILLER M, Paris F, Verniers J, et al. Origin and radiation of the earliest vascular land plants. Science. 2009;324:353–353.
MLA
STEEMANS, Philippe, Alain LE HÉRISSÉ, J. MELVIN, et al. “Origin and Radiation of the Earliest Vascular Land Plants.” Science 324 (2009): 353–353. Print.
@article{697223,
  abstract     = {Colonization of the land by plants most likely occurred in a stepwise fashion starting in the Mid-Ordovician. The earliest flora of bryophyte-like plants appears to have been cosmopolitan and dominated the planet, relatively unchanged, for some 30 million years. It is represented by fossilized dispersed cryptospores and fragmentary plant remains. In the Early Silurian, cryptospore abundance and diversity diminished abruptly as trilete spores appeared, became abundant, and underwent rapid diversification. This change coincides approximately with the appearance of vascular plant megafossils and probably represents the origin and adaptive radiation of vascular plants. We have obtained a diverse trilete spore occurrence from the Late Ordovician that suggests that vascular plants originated and diversified earlier than previously hypothesized, in Gondwana, before migrating elsewhere and secondarily diversifying.},
  author       = {STEEMANS, Philippe and LE H{\'E}RISS{\'E}, Alain and MELVIN, J. and MILLER, Merrell and Paris, Florentin and Verniers, Jacques and Wellman, C.H.},
  issn         = {0036-8075},
  journal      = {Science},
  language     = {eng},
  pages        = {353--353},
  title        = {Origin and radiation of the earliest vascular land plants},
  url          = {http://dx.doi.org/10.1126/science.1169659},
  volume       = {324},
  year         = {2009},
}

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