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Survey of Occurrences of Liquid or Soft Endosperm in Grass Genera
Edward E. Terrell
Bulletin of the Torrey Botanical Club
Vol. 98, No. 5 (Sep. - Oct., 1971), pp. 264-268
Published by: Torrey Botanical Society
Stable URL: http://www.jstor.org/stable/2483625
Page Count: 5
You can always find the topics here!Topics: Endosperm, Liquids, Genera, Solids, Spermatozoa, Grasses, Herbaria, Specimens, Botany, Fluids
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Liquid endosperm is a viscous fluid containing starches, proteins, and a relatively high content of oils. This endosperm may remain liquid for 40-50 years and soft at least 125 years. In a survey of 169 grass genera belonging to approximately 30 tribes, 30 genera were found to have at least one species with liquid or soft endosperm. On the basis of the species sampled endosperm conditions in the genera are as follows: liquid-Dichelachne, Gaudinia, Gaudinopsis, Helictotrichon, Koeleria, Lagurus, Limnodea, Peyritschia, Sphenopholis, Trisetaria, Trisetum; semi-liquid-Apera, Arctagrostis, Cinna, Parapholis; soft-Airopsis, Ammochloa, Beckmannia, Dactylis, Erianthecium, Holcus, Lamarckia. More variation occurs in Agrostis (liquid to solid), Alopecurus (semi-liquid to soft), Briza (semi-liquid to solid), Calamagrostis (soft to solid), and Avena (soft to solid). Old collections of Pholiurus, Pilgerochloa, and Ventenata had soft endosperm. These 30 genera of the subfamily Festucoideae have been assigned by various authors to as few as four or as many as eight tribes. This study provides data supporting reassignment of certain genera so that all thirty are included in three tribes: Aveneae (including Agrostideae in part), Festuceae, and Monermeae.
Bulletin of the Torrey Botanical Club © 1971 Torrey Botanical Society