Details for: PI 666027, Rheum ×rhabarbarum L., 'Kerwin'

Summary Data

Taxonomy:

Rheum ×rhabarbarum L.

Cultivar:

'Kerwin'

Origin:

Developed – Colorado, United States

Maintained:

Western Regional PI Station

Received by NPGS:

03 Apr 2001

Improvement Status:

Cultivar

Form Received:

Rhizome

Life Form:

Perennial

Life Cycle:

Perennial

Backup Location:

National Clonal Germplasm Repository

Availability

Form	Quantity	Note	Inventory	Cart
Plant	1 count		PI 666027 plant PL

Rheum (rhubarb) requesters please read: Due to limited staff, clonal rhubarb accessions are only distributed in early spring. Requests placed after March 31st will be filled the following year.

Images (3 total. Click on image for more.)

Core Passport Data

Taxonomy:

Rheum ×rhabarbarum L.

Cultivar:

'Kerwin'

Origin:

Developed – Colorado, United States

Maintained:

Western Regional PI Station

Received by NPGS:

03 Apr 2001

Improvement Status:

Cultivar

Form Received:

Rhizome

Life Form:

Perennial

Life Cycle:

Perennial

Source History

Developed

PRE 1992.
Colorado, United States
Comment: Terry Kerwin, PO Box 232, Silverton, CO

Donated

NEAR May 1992.
Colorado, United States
Comment: Donated to D. Marshall, MSU
NEAR 28 April 1999.
Michigan, United States
Comment: D. Marshall donates to B. Hellier, WSU
Donor(s):

Marshall, D. E., USDA, ARS

NEAR 03 April 2001.
Washington, United States
Comment: B. Hellier transferred from Pullman, WA to Palmer, AK
Donor(s):

Hellier, Barbara, USDA-ARS WRPIS

Accession Names and Identifiers

'Kerwin'

Type: Cultivar name

MSU 113

Type: Donor identifier

Marshall, D. E. USDA, ARS

AG 1251

Type: Site identifier

RB 42

Type: Site identifier

CRHE 42

Type: Inventory

Narrative

Rheum ×rhabarbarum L.

Genus:

Rheum

Family:

Polygonaceae

Subfamily:

Polygonoideae

Tribe:

Rumiceae

Nomen number:

404883

Place of publication:

Sp. pl. 1:372. 1753, pro sp.

Protologue link:

https://biodiversitylibrary.org/page/358391

Comment:

parentage unknown
non Rheum rhabarbarum auct E. Asian (= R. undulatum L.)

Typification:

View in Linnean Typification Project

Verified:

05/15/2012 by ARS Systematic Botanists.

Other conspecific taxa

Autonyms (not in current use), synonyms and invalid designations

Heterotypic Synonym(s)
Rheum ×cultorum Thorsrud & Reisaeter, nom. nud.
Rheum ×hybridum Murray
Rheum ×hybridum Murray var. hybridum

Invalid Designation(s)
Rheum rhaponticum auct.

Common names

Language	Name	note	seq	Citation
English	garden rhubarb		1	Erhardt, W. et al. 2002. Zander: Handwörterbuch der Pflanzennamen, 17. Auflage
English	pieplant	as Rheum ×cultorum	1	Huxley, A., ed. 1992. The new Royal Horticultural Society dictionary of gardening Note: = Rheum ×cultorum Thorsrud & Reis.
English	rhubarb		1	Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
French	rhubarbe	as Rheum rhaponticum	2	Rehm, S. 1994. Multilingual dictionary of agronomic plants Note: = Rheum rhaponticum L.
German	krauser Rhabarber		2	Erhardt, W. et al. 2002. Zander: Handwörterbuch der Pflanzennamen, 17. Auflage
German	österreichischer Rhabarber		2	Erhardt, W. et al. 2002. Zander: Handwörterbuch der Pflanzennamen, 17. Auflage
Italian	rabarbaro		2	International Seed Testing Association. 1982. A Multilingual Glossary of Common Plant-Names 1. Field crops, grasses and vegetables, ed. 2.
Italian	rabarbaro commune		2	Galasso, G. 2011. Review of Polygonaceae data for World Economic Plants, ed. 2. pers. comm.
Portuguese	ruibarbo	as Rheum rhaponticum	2	Rehm, S. 1994. Multilingual dictionary of agronomic plants Note: = Rheum rhaponticum L.
Spanish	ruibarbo	as Rheum rhaponticum	2	Rehm, S. 1994. Multilingual dictionary of agronomic plants Note: = Rheum rhaponticum L.
Spanish	wineplant		2	FNA Editorial Committee. 1993-. Flora of North America.
Swedish	rabarber	as Rheum ×hybridum	2	Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Korean	daehwang		2	Hoang, H.-D. et al. 1997. Additional notes to the checklist of Korean cultivated plants (5). Consolidated summary and indexes. Genet. Resources Crop Evol. 44:370.

Annotations

Nomenclature Name Change: 15 May 2012, from Rheum ×hybridum Murray to Rheum ×rhabarbarum L.
Taxonomic Re-Identification: 07 Jun 2011, from Rheum rhabarbarum auct. E. Asian to Rheum ×hybridum Murray

Observations

Phenotype Data

Category	Descriptor	Description	Value	Study	Inventory	Availability
CHEMICAL	Brix 1	Average measurement of dissolved sugar to water mass ratio of petiole	3.10	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
CHEMICAL	Brix 2	Average measurement of dissolved sugar to water mass ratio of petiole	3.15	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
CHEMICAL	Brix 3	Average measurement of dissolved sugar to water mass ratio of petiole	3.00	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
CHEMICAL	pH 1	Average pH - first measurement	2.68	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
CHEMICAL	pH 2	Average pH - second measurement	2.63	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
CHEMICAL	pH 3	Average pH - third measurement	2.63	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
GROWTH	Dry weight	Dry weigth of petioles in grams (average of 5 petioles)	15.13	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
GROWTH	Fresh weight	Fresh weigth of petioles in grams (average of 5 petioles)	73.55	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
GROWTH	Percent dry matter	Calculation of dry weight to fresh weight ratio	5.68	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
GROWTH	Petiole length	Length of petiole in mm (average of 5 petioles)	250.0	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
GROWTH	Petiole number	Number of petioles on plant (count)	44.5	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
GROWTH	Plant height	Height of plant in cm (average of 5 plants)	56.0	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Apex shape	Shape of leaf apex (outer end opposite petiole)	7 - Acute	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Lamina cleft	Presence or absence of lamina cleft/indentation	3 - No	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Lamina bottom color	Color of the bottom of the leaf surface	5 - Gray-green	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Margin type	Type of leaf margin	3 - Sinuate	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Mashed flesh color	Color of flesh after being mashed	1 - Green	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Petiole apex skin color	Color of the apex of the petiole	1 - Green	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Petiole base color	Color of the base of the petiole	3 - Rose	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Petiole color gradient	Presence or absence of color gradient from the base to the apex of the petiole	5 - Multiple color gradient	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Petiole midskin color	Color of the midskin of the petiole	1 - Green	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Petiole base thickness	Thickness of the base of the petiole in mm (average of 5 petioles)	11.8	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Lamina length	Length of leaf surface in mm (average of 5 leaves)	228	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
MORPHOLOGY	Lamina width	Width of leaf surface in mm (average of 5 leaves)	190.5	For a Excel file of the 2008 Rhubarb data .">RHUBARB.2008.PALMER	RB 42 clones PL	Not Available
OTHER	Image/picture	A picture or image	leaf	RHUBARB.LEAF.IMAGES	RB 42 clones PL	Not Available
OTHER	Image/picture	A picture or image	petiole	RHUBARB.PETIOLE.IMAGES	RB 42 clones PL	Not Available
OTHER	Image/picture	A picture or image	petiole2	RHUBARB.PETIOLE.IMAGES	RB 42 clones PL	Not Available