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Cyperus involucratus

Cyperus involucratus Rottb.

Cyperus alternifolius auct. non L.

Cyperus alternifolius L. ssp. flabelliformis (Rottb.) Kük.

Cyperus flabelliformis Rottb.

Umbrella Plant

KingdomPlantaePlants, but not fungi, lichens, or algae (from Stearn’s Botanical Latin)
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassLiliopsidaMonocots (plants with a single seed leaf); includes the lily family
SubclassCommelinidaeDayflowers and spiderworts, and several others
OrderCyperalesFlowering plants including grasses
FamilyCyperaceaeSedge family
GenusCyperusFrom an ancient Greek word meaning “sedge”
Speciesinvolucratus

About plant names...

Probably native to Madagascar, the umbrella sedge has become naturalized throughout much of Africa and southern North America. It can become invasive in wet habitats. It is closely related and similar in appearance to the Egyptian papyrus plant.

Identification: These plants most prefer wet, boggy habitats. They grow in dense clumps of triangular stems 24-72" (60-182 cm) high. Stems are leafless except at the bottom, where there are some inconspicuous basal leaves, and at the tops, where are starlike array of long, narrow grasslike leaves spreads extend in a circle around the stem. Each leaf is 6-15" (15-38 cm) × ½" (1.3 cm). At the center there is a cluster of 15-25 greenish spikelet flowers. Individual spikelets are up to ⅜" (9.5 mm) long.

Online References:

Cyperus involucratus on FLORIDATA

Cyperus involucratus on Forest and Kim Starr’s Starr Environmental site

Cyperus involucratus on Calflora

Cyperus involucratus on SEINet—the Southwest Environmental Information Network

Cyperus involucratus from the Jepson Manual

Cyperus involucratus (Umbrella Plant)

4/6/2011 · Howard Peters Rawlings Conservatory & Botanic Gardens, Druid Hill Park, Baltimore, MD
≈ 4½ × 3" (11 × 7.9 cm)

Cyperus involucratus description by Thomas H. Kent, last updated 16 Aug 2013.

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Cyperus involucratus (Umbrella Plant)

4/6/2011 · Howard Peters Rawlings Conservatory & Botanic Gardens, Druid Hill Park, Baltimore, MD
≈ 14 × 21" (34 × 52 cm)

Cyperus involucratus (Umbrella Plant)

4/6/2011 · Howard Peters Rawlings Conservatory & Botanic Gardens, Druid Hill Park, Baltimore, MD
≈ 9 × 14" (23 × 35 cm)

Range: Zones 8-11:

About this map...