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Special features of the inflorescence structure in the family Cyperaceae

ILKKA KUKKONEN
Annales Botanici Fennici
Vol. 23, No. 2 (1986), pp. 107-120
Stable URL: http://www.jstor.org/stable/23725464
Page Count: 14
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Special features of the inflorescence structure in the family Cyperaceae
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Abstract

The typological method of W. Troll and F. Weberling is applied to a few further examples of the inflorescence structure encountered in the family Cyperaceae. The new examples include representatives from groups III (Becquerelia cymosa) and IV (Coleochloa setifera), as defined by L. T. Eiten, but attention is focused on the variation in parts of the inflorescences and on the terms applied in the descriptions. The inflorescence structure of Blysmus compressus is reconsidered; it is confirmed that a flower may also occur in the axil of a bract, and pointed out that the most distal flowers may be functionally pistillate. Sympodial branching, claimed by early and also later authors to occur in the tribe Rhynchosporeae, is discussed in connection with the inflorescence structure of Schoenus ferrugineus. The inflorescence of Rhynchospora brownii is characterized by repeated branching, in which feature it differs from R. fusca, discussed previously. The structures encountered in Coleochloa setifera and Becquerelia cymosa add to the range of variation observed by the author so far. Finally, the mode of branching is discussed, and the terms bract, prophyll and glume are reconsidered and defined.

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