Carex billingsii (Knight) Kirschbaum, Billings' Sedge (Section GLAREOSAE)
Carex billingsii grows in sunny open peatlands and poor fens in very dense clumps. It is presently considered to be rare in Renfrew County. It was once considered a variety of the very similar C. trisperma species and was only recently elevated to the rank of species [Kirschbaum, 2007]. Carex billingsii has fewer perigynia in the spikelets and finer involute leaves when compared to C. trisperma.
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Figure 1. Achenes, perigynia and scales.
Figure 2. Inflorescence.
Figure 3. Habitat with Carex billingsii as dominate ground cover.
Figure 4. Habit.
Figure 5. Habit.
Figure 6. Habit with Calopogon tuberosus.
Figure 7. Occurence map for Renfrew County and surrounding area.
| Accession # | Collector | Date |
|---|---|---|
| CAN 608980 | G.A. Bickel | 2014-July-05 |
| DAO 262998 | M.I. Moore | 1962-June-20 |
References
Kirschbaum, C.D., The Taxonomy of Carex trisperma (Cyperaceae), J. Bot. Res. Inst. Texas 1(1): 389–405, 2007