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Vascular Plants of California
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Cortaderia jubata
PURPLE PAMPAS GRASS, JUBATA GRASS


Higher Taxonomy
Family: Poaceae (Gramineae)View DescriptionDichotomous Key
Common Name: GRASS FAMILY
Habit: Annual to woody perennial herb; roots generally fibrous. Stem: generally round, hollow; nodes swollen, solid. Leaf: alternate, 2-ranked, generally linear, parallel-veined; sheath generally open; ligule membranous or hairy, at blade base. Inflorescence: various (of generally many spikelets). Spikelet: glumes generally 2; florets (lemma, palea, flower) 1--many; lemma generally membranous, sometimes glume-like; palea generally +- transparent, +- enclosed by lemma. Flower: generally bisexual, minute; perianth vestigial; stamens generally 3; stigmas generally 2, generally plumose. Fruit: grain, sometimes achene- or utricle-like.
Genera In Family: 650--900 genera; +- 10550 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials). Note: Generally wind-pollinated. Achnatherum, Ampelodesmos, Hesperostipa, Nassella, Piptatherum, Piptochaetium, Ptilagrostis moved to Stipa; Elytrigia, Leymus, Pascopyrum, Pseudoroegneria, Taeniatherum to Elymus; Hierochloe to Anthoxanthum; Lolium, Vulpia to Festuca; Lycurus to Muhlenbergia; Monanthochloe to Distichlis; Pleuraphis to Hilaria; Rhynchelytrum to Melinis. The following taxa (in genera not included here), recorded in California from historical collections or reported in literature, are extirpated, lacking vouchers, or not considered naturalized: Acrachne racemosa (Roth) Ohwi, Allolepis texana (Vasey) Soderstr. & H.F. Decker, Amphibromus nervosus (Hook. f.) Baill., Axonopus affinis Chase, Axonopus fissifolius (Raddi) Kuhlm., Coix lacryma-jobi L., Cutandia memphitica (Spreng.) K. Richt., Dinebra retroflexa (Vahl) Panz., Eremochloa ciliaris (L.) Merr., Eustachys distichophylla (Lag.) Nees, Gaudinia fragilis (L.) P. Beauv., Miscanthus sinensis Andersson, Neyraudia arundinacea (L.) Henrard, Phyllostachys aurea Rivière & C. Rivière, Phyllostachys bambusoides Siebold & Zuccarini, Rottboellia cochinchinensis (Lour.) Clayton, Schedonnardus paniculatus (Nutt.) Branner & Coville, Schizachyrium cirratum (Hack.) Wooton & Standl., Schizachyrium scoparium (Michx.) Nash, Themeda quadrivalvis (L.) Kuntze, Thysanolaena latifolia (Hornem.) Honda, Tribolium obliterum (Hemsl.) Renvoize, Zea mays L., Zizania palustris L. var. interior (Fassett) Dore, Zoysia japonica Steud. Paspalum pubiflorum E. Fourn., Paspalum quadrifarium Lam., are now reported for southern California (J Bot Res Inst Texas 4:761--770). See Glossary p. 30 for illustrations of general family characteristics.
eFlora Treatment Author: James P. Smith, Jr., except as noted
Scientific Editor: James P. Smith, Jr., J. Travis Columbus, Dieter H. Wilken.
Genus: CortaderiaView DescriptionDichotomous Key


Habit: Perennial herb; dioecious. Stem: densely clumped, erect. Leaf: generally basal with conspicuous midrib; sheath glabrous to hairy, fracturing into short segments with age; blade flat and folded, margin sharp and cutting. Inflorescence: panicle-like, plume-like. Spikelet: +- laterally compressed; glumes unequal, 1-veined; florets 2--8, breaking above glumes and between florets; lemma silky-hairy, 3-veined, tip drawn out, awn-like.
Etymology: (Spanish, to cut or harvest)
eFlora Treatment Author: H.E. Connor
Reference: Allred 2003 FNANM 25:298--299
Unabridged Reference: Costas-Lippmann 1977 Fremontia 4:25--27
Cortaderia jubata (Lemoine) Stapf
NATURALIZED
Habit: Plants pistillate only, producing fruit asexually. Stem: 2--7 m. Leaf: blade 2--12 mm wide, both surfaces green, with row of short hairs at base adaxially. Inflorescence: 3--10 dm, violet becoming dull brown. Spikelet: 14--16 mm; lemma hairy. Chromosomes: 2n=108.
Ecology: Disturbed sites, many habitats, especially coastal; Elevation: < 800 m. Bioregional Distribution: NCo, NCoRO, CCo, SnFrB, SCo, WTR; Distribution Outside California: Oregon; native to montane western South America. Flowering Time: Sep--Feb
Jepson eFlora Author: H.E. Connor
Reference: Allred 2003 FNANM 25:298--299
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Noxious Weed listed on the CDFA Weed Pest Ratings table
View the CDFA Pest Rating page for Cortaderia jubata
Weed listed by Cal-IPC

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Botanical illustration including Cortaderia jubata

botanical illustration including Cortaderia jubata

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Citation for this treatment: H.E. Connor 2012, Cortaderia jubata, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=20427, accessed on April 17, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 17, 2024.

Cortaderia jubata
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©2008 Neal Kramer
Cortaderia jubata
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©2005 Steve Matson
Cortaderia jubata
click for enlargement
©2008 Neal Kramer
Cortaderia jubata
click for enlargement
©2005 Steve Matson
Cortaderia jubata
click for enlargement
©2011 Neal Kramer

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Geographic subdivisions for Cortaderia jubata:
NCo, NCoRO, CCo, SnFrB, SCo, WTR
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).





 

Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).