BugwoodWiki Article

purple pampasgrass
Cortaderia jubata (Lem.) Stapf

Overview

Appearance
Cortaderia jubata is a large, tufted, perennial grass native to South America.
Foliage
Leaves are basal, ascending to spreading, bright green, sharply serrated and can reach to 5 ft. (1.5 m) in height.
Flowers
Flowering occurs in late summer to early fall, when 1-3.3 ft. (0.3-1 m) long, purple-tinged plumes develop over the tufts of leaves.
Fruit
All plants are female and develop seed through apomixes (without fertilization). Each plume can produce up to 100,000 seeds.
Ecological Threat
Cortaderia jubata invades roadsides, dunes, bluffs and other disturbed areas. Plants also invade coastal shrub and grasslands.

General Description:

Cortaderia jubata is a large tussock grass with most of its leaves near the base and narrow, attenuate blades. The panicles are large, terminal, and plume like. Spikelets are several flowered, with internodes of the rachilla jointed, the lower part glabrous (smooth), the upper part bearded. Glumes extend beyond the lower florets. Plants are dioecious (staminate and pistillate flowers on different plants), with male spikelets covered with long hairs.

Distinctive features of C. jubata are huge nodding pinkish or purplish flower plumes (later turning creamy white), and dark green 1-cm-wide drooping leaves with razor like margins. Flower stems rise up to 3 times higher than the clump of foliage. This contrasts with another commonly planted pampas grass, C. selloana, which has narrower, blue green leaves and glistening white plumes when mature. The most important feature of C. jubata as a weed is that it produces abundant seeds annually and establishes rapidly on bare soil, while C. selloana sets relatively few seeds and rarely becomes naturalized.

Cortaderia jubata and 23 other species in the genus are described in Conner and Edgar (1974).

Resources

Selected Images


5341061
5341061

purple pampasgrass
Cortaderia jubata
Plant(s)
John M. Randall
5341062
5341062

purple pampasgrass
Cortaderia jubata
Flower(s)
John M. Randall
5341063
5341063

purple pampasgrass
Cortaderia jubata
Infestation
Mandy Tu
5341064
5341064

purple pampasgrass
Cortaderia jubata
Plant(s)
Mandy Tu
5341065
5341065

purple pampasgrass
Cortaderia jubata
Infestation
Mandy Tu
5341066
5341066

purple pampasgrass
Cortaderia jubata
Infestation
Mandy Tu
5387230
5387230

purple pampasgrass
Cortaderia jubata
Flower(s)
Joseph M. DiTomaso
5387231
5387231

purple pampasgrass
Cortaderia jubata
Stem(s)
Joseph M. DiTomaso
5392077
5392077

purple pampasgrass
Cortaderia jubata
Seed(s)
John M. Randall
5414537
5414537

purple pampasgrass
Cortaderia jubata
Plant(s)
Forest and Kim Starr
5414539
5414539

purple pampasgrass
Cortaderia jubata
Feature(s)
Forest and Kim Starr
5414540
5414540

purple pampasgrass
Cortaderia jubata
Foliage
Forest and Kim Starr

Maps


EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

State Regulated List

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Liliopsida
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae
Genus: Cortaderia

Other System Links

Plants: COJU2
GRIN: 403448
ITIS: 501640

Synonyms and Other Names

Other Common Names:
Andean pampas grass, jubatagrass, purple pampasgrass, selloa pampasgrass

Related Scientific Names:

Cortaderia atacamensis (Lem.) Stapf(Synonym)

Categories

Category: Grass or Grasslike