Amelanchier nantucketensis - Bickn.
Nantucket Shadbush
Other English Common Names: Nantucket Serviceberry
Other Common Names: Nantucket serviceberry
Synonym(s): Amelanchier x nantucketensis Bickn.
Taxonomic Status: Accepted
Related ITIS Name(s): Amelanchier nantucketensis Bickn. (TSN 182047)
French Common Names: amélanchier de Nantucket
Unique Identifier: ELEMENT_GLOBAL.2.134869
Element Code: PDROS05080
Informal Taxonomy: Plants, Vascular - Flowering Plants - Rose Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Rosales Rosaceae Amelanchier
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Amelanchier nantucketensis
Taxonomic Comments: Taxonomic questions: suspected to be a functioning apomictic species or stabilized hybrid, perhaps same as plants previously called Amelanchier stolonifera var. micropetala.
Conservation Status
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NatureServe Status

Global Status: G3Q
Global Status Last Reviewed: 27Jun2016
Global Status Last Changed: 10Aug1995
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G3 - Vulnerable
Reasons: Small range with 50-60 known occurrences, widespread and fairly common on Nantucket. Plant is clonal, often forming large patches. Therefore individual plants are relatively few.
Nation: United States
National Status: N3
Nation: Canada
National Status: N1 (21Sep2017)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Maine (S2), Maryland (S1), Massachusetts (S3), New York (S1), Virginia (S1)
Canada Nova Scotia (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Small, discontinuous range, with most occurrences on Nantucket and Martha's Vineyard Islands, Mass., and a few additional sites on Long Island, N.Y., at Great Falls, Md., Great Falls, Va. (Steury et al. 2008), and in Maine and Nova Scotia.

Number of Occurrences: 21 - 80
Number of Occurrences Comments: 50-60 extant populations: 45 in Mass., a few in Maine and New York, one each in Maryland and Virginia. One recently verified occurrence in Nova Scotia but there may be more there and in neighboring Prince Edward Island and and New Brunswick (Sean Blaney, pers. comm., Dec. 2009).

Population Size Comments: Widespread and fairly common on Nantucket, uncommon and local on Martha's Vineyard, MA; small populations in NY, ME, MD and Nova Scotia. However, plants are generally clonal, so few genotypes may be present even when stems are numerous.

Overall Threat Impact Comments: Forest succession, lack of natural fires; development. Some of the original sites found in Maine have been lost due to construction.

Intrinsic Vulnerability Comments: Susceptible to overshading by taller woody vegetation; favors periodic disturbances; hardy shrub.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Small, discontinuous range, with most occurrences on Nantucket and Martha's Vineyard Islands, Mass., and a few additional sites on Long Island, N.Y., at Great Falls, Md., Great Falls, Va. (Steury et al. 2008), and in Maine and Nova Scotia.

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States MA, MD, ME, NY, VA
Canada NS

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
MA Barnstable (25001), Berkshire (25003), Dukes (25007), Franklin (25011), Nantucket (25019), Norfolk (25021)
MD Montgomery (24031)
ME Aroostook (23003)*, Hancock (23009), Penobscot (23019), Washington (23029)
NY Richmond (36085), Suffolk (36103)
VA Fairfax (51059)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Upper St. John (01010001)+*, Lower Penobscot (01020005)+, Maine Coastal (01050002)+, Middle Connecticut (01080201)+, Charles (01090001)+, Cape Cod (01090002)+, Housatonic (01100005)+
02 Sandy Hook-Staten Island (02030104)+, Southern Long Island (02030202)+, Middle Potomac-Catoctin (02070008)+
CA CAPE COD (CAPE COD)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A leafy, much-branched shrub 2-5 feet high. The bark of the younger parts is purplish and becomes grey. The leaves are dark green, finely serrate except at the base, and have scattered hairs on the upper surface. The flowers are cream-colored and the berries are dark blue.
Technical Description: Stoloniferous or surculose slender shrub forming more or less circular colonies, 0.2-1.5 m high; overwintering buds reddish, 5-8 mm long, varnished; leaves promptly glabrate or glabrous becoming lustrous above, 2-3 cm long and 1.5-2 cm broad; raceme lax, 2-4.5 cm long, the rachis and pedicels promptly glabrate; longest pedicels becoming 1-2 cm long, soon recurving; petals linear-oblanceolate, frequently involute, 3-7 mm long, 1-2 mm wide. (Fernald, 1950)
Diagnostic Characteristics: Amelanchier nantucketensis may be characterized by expanding leaves sparingly pubescent, soon glabrate beneath, in maturity quite glabrous; petioles promptly glabrate; longest fruiting pedicels 1-2 cm long, glabrous; hypanthium 4-5 mm in diameter; sepals 2-4 mm long, lanceolate, attenuate, soon recurving (Fernald, 1950).
Duration: PERENNIAL, Long-lived
Palustrine Habitat(s): Bog/fen
Terrestrial Habitat(s): Old field
Habitat Comments: Open sandplain grasslands and ericaceous, morainal heathlands or moors. Pitch-pine-oak or scrub-oak barrens.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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Excellent Viability: Large population (>100 ramets or > 20 genets ) without impairment to reproduction in a pristine to minimally human disturbed landscape. Occupying a linear area of riverbank > 500 m or other upland habitat of at least 2 acres.
Good Viability: Moderate size population (50-99 ramets or 10-19 genets) without impairment to reproduction in a pristine to moderately human disturbed landscape. Occupying a linear area of riverbank > 100 m, or other upland habitat of at least 1 acre.

Fair Viability: Moderate size population (50-99 ramets or 10-19 genets) without impairment to reproduction in a highly disturbed to converted landscape OR a small size population (10-49 ramets or 4-9 genets) with or without impairment to reproduction in a minimal to moderately disturbed landscape. The rank of BC may be assigned to a large population (>100 ramets or > 20 genets) without impairment to reproduction in a relatively disturbed landscape OR to a small population (10-49 ramets or 4 -9 genets) spread over a broad area in a pristine landscape.

Poor Viability: Tiny size population (1-10 ramets or 1-3 genets) with or without impairment to reproduction in a highly disturbed to converted landscape. The rank of CD may be assigned to small population (10-49 ramets or 4 -9 genets) in a highly disturbed landscape OR to a tiny population (1-10 ramets or 1-3 genets) in a pristine to moderately disturbed landscape.

Justification: Rank criteria are based on actual population numbers across species range. EO's record variously numbers of ramets (clones) or plants (genets), therefore both were included in the EO rank specifications.

Key for Ranking Species Element Occurrences Using the Generic Approach (2008).
Date: 03May2006
Author: Toni Bingel Pied
Notes: EO Rank Specifications created by Don Cameron (2005-03-24)
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 21May1987
NatureServe Conservation Status Factors Author: Roth, E. (1987), rev. C. Russell (1995), rev. L. Morse (1998), rev. G. Davis (2009)
Element Ecology & Life History Edition Date: 23Jun1992

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Bicknell, Eugene P. 1911. The ferns and flowering plants of Nantucket-VIII. Bulletin of the Torrey Botanical Club 38 (10): 447-460.

  • Crow, Garrett E. 1982. New England's Rare, Threatened, and Endangered Plants. Prepared for the United States Department of Interior, Fish and Wildlife Service, Northeast Region. June 1982.

  • Dibble, Alison C. and Christopher S. Campbell. 1995. Distribution and conservation of Nantucket shadbush, Amelanchier nantucketensis (Rosaceae). Rhodora 97(892): 39-349.

  • Dibble, Alison C. and Francis A. Drummond. 1997. Floral syndrome in Amelanchier nantucketensis (Rosaceae). 1. Floral density, bee activity, and characterization of andropetaly.

  • Fernald, M. L. 1950. Gray's manual of botany. 8th edition. Corrected printing (1970). D. Van Nostrand Company, New York. 1632 pp.

  • Fernald, M.L. 1950. Gray's Manual of Botany, 8th ed., Corr. Printing, 1970. Van Nostrand, New York. LXIV+1632 pp.

  • Flora of North America Editorial Committee. 2014b. Flora of North America North of Mexico. Vol. 9. Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York. xxiv + 713 pp.

  • Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York. 910 pp.

  • Haines, Arthur and Thomas F. Vining. 1998. Flora of Maine. A Manual for Identification of Native and Naturalized Vascular Plants of Maine.

  • Holmgren, Noel. 1998. The Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Mitchell, Richard S. and Gordon C. Tucker. 1997. Revised Checklist of New York State Plants. Contributions to a Flora of New York State. Checklist IV. Bulletin No. 490. New York State Museum. Albany, NY. 400 pp.

  • New York Natural Heritage Program. 2010. Biotics database. New York Natural Heritage Program. New York State Department of Environmental Conservation. Albany, NY.

  • Reschke, Carol. 1990. Ecological communities of New York State. New York Natural Heritage Program, New York State Department of Environmental Conservation. Latham, NY. 96 pp. plus xi.

  • Seymour, F.C. 1989. The flora of New England. A manual for the identification of all vascular plants including ferns and their allies growing without cultivation in New England. Boston Museum Science, Boston. 611 pp. + appendix.

  • Steury, B.W., G.P. Fleming, and M.T. Strong. 2008. An emendation of the vascular flora of Great Falls Park, Fairfax County, Virginia. Castanea 73(2):123-149.

  • Weldy, T. and D. Werier. 2010. New York flora atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research http://www.fccdr.usf.edu/. University of South Florida http://www.usf.edu/]. New York Flora Association http://wwws.nyflora.org/, Albany, New York

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