Details for: PI 536793, Lactuca sativa L., 'Unrivaled'

Summary Data

Taxonomy:

Lactuca sativa L.

Cultivar:

'Unrivaled'

Origin:

Donated – California, United States

Maintained:

Western Regional PI Station

Received by NPGS:

01 Dec 1989

Improvement Status:

Cultivar

Form Received:

Seed

Life Form:

Annual

Life Cycle:

Annual

Backup Location:

National Laboratory for Genetic Resources Preservation

Availability

Form	Quantity	Note	Inventory	Cart
Seed	100 count		PI 536793 99is SD

Restrictions
Plant material may be subject to additional regulations
https://www.nationalplantboard.org/uploads/1/3/6/7/136771235/florida_laws_and_regulations_2022july8.pdf

USA – Florida (See state regulation: Lettuce mosaic)

https://www.nationalplantboard.org/uploads/1/3/6/7/136771235/arizona_npb_summary_061124.pdf

USA – Arizona (See state regulations: Lettuce mosaic.)

There are no images for this accession.

Core Passport Data

Taxonomy:

Lactuca sativa L.

Cultivar:

'Unrivaled'

Origin:

Donated – California, United States

Maintained:

Western Regional PI Station

Received by NPGS:

01 Dec 1989

Improvement Status:

Cultivar

Form Received:

Seed

Life Form:

Annual

Life Cycle:

Annual

Source History

Donated

February 1962.
California, United States

Donor(s):

Pieter-Wheeler Seed Company

Accession Names and Identifiers

'Unrivaled'

Type: Cultivar name

Big Boston

Type: Other or unclassified name

Noted as a synonym by Ed Ryder

Ryder, Edward J. USDA, ARS

W6 6522

Type: Site identifier

Group: W6

Western Regional Plant Introduction (W6) accession numbers

USDA-ARS, WRPIS

Narrative

Maturity 70 days. Seeds white. A cabbage, butterhead type. Leaves smooth and straight on edges. Plants and head entirely light green. Hearts buttery and yellow.

Lactuca sativa L.

Genus:

Lactuca

Section:

Lactuca

Family:

Asteraceae (alt. Compositae)

Subfamily:

Cichorioideae

Tribe:

Cichorieae

Subtribe:

Lactucinae

Nomen number:

21360

Place of publication:

Sp. pl. 2:795. 1753

Protologue link:

https://www.biodiversitylibrary.org/page/358816

Typification:

View in Linnean Typification Project

Verified:

10/02/1996 by ARS Systematic Botanists.

Other conspecific taxa

Lactuca sativa L. var. angustana Irish (0 active accession[s])
Lactuca sativa L. var. capitata L. (6 active accession[s])
Lactuca sativa L. var. crispa L. (0 active accession[s])
Lactuca sativa L. var. longifolia Lam. (0 active accession[s])
Lactuca sativa L. var. sativa (0 active accession[s])

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

Common names

Language	Name	seq	Citation
English	garden lettuce	1	Huxley, A., ed. 1992. The new Royal Horticultural Society dictionary of gardening
English	lettuce	1	Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
French	laitue	2	Rehm, S. 1994. Multilingual dictionary of agronomic plants
French	laitue cultivée	2	Demilly, D. et al. 2001. Liste alphabétique des principales espèces de plantes cultivées et de mauvaises herbes. Noms latins et noms français, ed. 7 GEVES-SNES, Beaucouzé, France.
German	Garten-Lattich	2	Erhardt, W. et al. 2008. Der große Zander: Enzyklopädie der Pflanzennamen 1498.
German	grüner Salat	2	Rehm, S. 1994. Multilingual dictionary of agronomic plants
German	Kopfsalat	2	Rehm, S. 1994. Multilingual dictionary of agronomic plants
Italian	lattuga	2	International Seed Testing Association. 1982. A Multilingual Glossary of Common Plant-Names 1. Field crops, grasses and vegetables, ed. 2.
Portuguese	alface	2	Rehm, S. 1994. Multilingual dictionary of agronomic plants
Spanish	lechuga	2	Rehm, S. 1994. Multilingual dictionary of agronomic plants
Swedish	sallat	2	Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Korean	sangchu	2	Mun-Chan, B. et al. 1986. A checklist of the Korean cultivated plants. Kulturpflanze 34:105.

Annotations

Observations

Phenotype Data

Category	Descriptor	Description	Value	Sample Size	Study	Inventory	Availability
MORPHOLOGY	Head type	Head type	BUT - BUTTERHEAD		LETTUCE.HEADTYPE.YR.RYDER	PI 536793 2000ic SD	Not Available
MORPHOLOGY	Head type	Head type	BUT - BUTTERHEAD (100%)	20	LETTUCE.2010.SALINAS.HELLIER(1)	PI 536793 99i SD	Not Available
MORPHOLOGY	Seed color	Seed color	WH - white (100%)		LETTUCE.SEEDCOLOR.2015.PULLMAN	PI 536793 99i SD	Not Available
MORPHOLOGY	Seed weight 100	Weight of 100 seeds in grams.	0.1		LETTUCE.SEEDWEIGHT.WRPIS	PI 536793 99i SD	Not Available