Plant Index


 
 
 

Pycnanthemum tenuifolium

Pycnanthemum tenuifolium Schrad.

narrow-leaf mountain-mint, slender mountain-mint

Synonym(s): Koellia flexuosa, Pycnanthemum flexuosum
Pycnanthemum tenuifolium (Narrow-leaf Mountain-mint)
Image ID: 18554
Image by: Ware, Richard & Teresa
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: PYTE
SCIENTIFIC NAME: Pycnanthemum tenuifolium
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2019-03-15

GENUS INDEX

GENUS CODE: PYCNA
GENUS SCIENTIFIC: Pycnanthemum
GENUS AUTHORITY: Michx.
GENUS COMMON: Mountainmint
GENUS SUMMARY: A genus of 20-25 species, herbs, of temperate North America. Pycnanthemum remains a complicated and difficult group, with speciation apparently having proceeded by allopolyploidy, autoploidy, and aneuploidy. Numerous aberrant forms and (probably) sterile hybrids complicate identification and understanding.
GENUS IDENTIFICATION:
GENUS REFERENCES: Chambers (1993); Grant & Epling (1943)=Z; Chambers & Hamer (1992)=Y; Harley et al. in Kadereit (2004).

FAMILY INDEX

FAMILY CODE: LAMIAC
FAMILY SCIENTIFIC: Lamiaceae
FAMILY AUTHORITY: Lindley 1836 or LABIATAE A.L. de Jussieu 1789
FAMILY COMMON: Mint Family
FAMILY SUMMARY: A family of about 230-250 genera and 6700-7170 species, herbs, shrubs, vines, and trees, cosmopolitan. The placement in the Lamiaceae of several genera traditionally placed in Verbenaceae (e.g. Clerodendrum) is strongly supported by several lines of evidence.
FAMILY REFERENCE: Harley et al. in Kadereit (2004).

NCBG DESCRIPTIVES

INTRO: Erect, rhizomatous perennial found in bogs, wet meadows and moist to wet forests and clearings.
STEMS: Stems slender, 4-angled, bushy-branched, smooth.
LEAVES: Leaves opposite, mostly sessile, linear, to 2 in. long, gland-dotted and with mint-like odor.
INFLORESCENCE:
FLOWERS: Flowers crowded in dense, branching, flat-topped heads with small, white, hairy bracts in addition to flowers; each flower white to pale pink, less than ¼ in. long, tubular opening to 2 spreading lips and with 2 purple anthers.
FRUITS:
COMMENTS:
HEIGHT: 1-2 1/2 ft.

DURATION: Perennial
HABIT: Herb

LEAF ARRANGEMENT: Opposite
LEAF COMPLEXITY: Simple
LEAF RETENTION:

FLORAL CHARACTERISTICS
SYMMETRY: Bilateral (Zygomorphic)
BLOOM TIME: June-Sep
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
x x x x x

BLOOM COLOR: White
White Red Pink Orange Yellow Green Blue Lavender Purple Violet Brown Not Applicable
x

FRUITING PERIOD: Sep-Oct.

DISTRIBUTION
HABITAT TYPE: Bogs/pocosins, Moist forests
NATIVE RANGE: eastern United States

HORTICULTURAL
Plant Sale Text: Narrow-leaf mountain-mint is an easy-to-grow southeastern native perennial with delightfully scented foliage. Just brush your hand lightly across the leaves to release the fresh minty fragrance. Narrow-leaf mountain-mint produces copious amounts of nectar, attracting and feeding many beneficial insects. Its upright stems bearing many small white flowers add an unusual cool touch to the summer garden, and make an excellent filler for flower arrangements.

Bloom Table Text: This plant is attractive to the eye as well as being a rich source of nectar to a multitude of insects and butterflies. The scientific name for the Mountain-mint comes from the greek, pyknos, meaning dense, and anthemon, a flower. It refers to the crowded clusters of flowers with small, leafy bracts immediately below them. Mountain-mints are erect, perennial, aromatic, herbaceous plants with rhizomes and branched or branchless, four-angled stems. These plants are often found in ordinary soil, neither excessively wet nor dry. They are planted in spring or early fall and will grow in sun or light shade. One can propagate the plant by division or seed.

NCBG Location: Education Center Landscape, Piedmont Habitat

Cultural Notes:

SOIL MOISTURE: Dry, Average, Moist/Wet
LIGHT EXPOSURE: Sun, Part Shade
MINIMUM HARDINESS ZONE: 3
MAXIMUM HARDINESS ZONE: 9
GERMINATION CODE: 1
WILDLIFE VALUE: Bee Friendly, Butterfly Friendly
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
279 2011-0135 2011-06-16 284 View
315 2011-0182 2011-07-12 320 View
2217 1986-2036 View
4330 1992-0486 View
5685 1995-0809 View
6260 1995-1392 View
6715 1996-0370 View
9062 2001-0220 2006-12-19 1232 View
9238 2014-0015 2020-05-08 0 View
9417 2021-0079 2021-06-29 View
9451 2021-0110 2021-07-13 0 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
284 HORT 2009-01-01 NCBG staff View
320 HORT 2008-09-29 Liloia View
769 SOS 2016-10-04 Walker View
807 SOS 2016-10-21 Dakar View
1232 HORT View
1826 HORT 2006-10-01 Bryan View
1854 HORT 2006-10-01 Bryan View
2189 NPMD 2019-08-28 Touloupas View
2212 NPMD 2019-09-09 Touloupas View
2221 NPMD 2019-09-11 Touloupas View
2251 NPMD 2019-09-24 Touloupas View
2379 NPMD 2019-12-05 Touloupas View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
670 279 21 NCBG staff 2011-04-08 View
734 315 19 NCBG staff 2011-05-12 View
3851 2217 58 NCBG staff 1986-12-23 View
3852 2217 59 NCBG staff 0000-00-00 View
6658 4330 200 NCBG staff 1993-03-01 View
8199 5685 204 NCBG staff 1993-01-01 View
8915 6260 2 NCBG staff 0000-00-00 View
9483 6715 8 NCBG staff 1996-03-28 View
11079 9062 139 NCBG staff 0000-00-00 View
11080 9062 140 NCBG staff 0000-00-00 View
11081 9062 142 NCBG staff 0000-00-00 View
12356 9238 18 Liloia 2014-08-26 View
12652 9238 19 NCBG staff 0000-00-00 View
12730 9417 146 Wenck 2021-05-03 View
12766 0 23 Liloia 0000-00-00 View
12844 9451 21 Liloia 0000-00-00 View

USDA PLANTS DATABASE

USDA Symbol: PYTE
USDA Common Name: Narrowleaf Mountainmint
Native Status: L48 (N), CAN (N)
Distribution: USA (AL, AR, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, NE, NH, NJ, NY, OH, OK, PA, RI, SC, TN, TX, VA, VT, WI, WV), CAN (ON, QC)
Duration: Perennial
Growth Habit: Forb/herb

NATIONAL WETLAND INDICATOR STATUS

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: FACW FACW FAC FAC FAC

This information is derived from the U.S. Army Corps of Engineers 2016 National Wetland Plant List, Version 3.3 (Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X). Regions: AGCP-Atlantic and Gulf Coastal Plain, AK-Alaska, AW-Arid West, CB-Caribbean, EMP-Eastern Mountains and Piedmont, GP-Great Plains, HI-Hawaii, MW-Midwest, NCNE-Northcentral and Northeast, WMCV-Western Mountains, Valleys & Coast

WEAKLEY FLORA

SCIENTIFIC NAME: Pycnanthemum tenuifolium
COMMON NAME: Slender Mountain-mint
SYNONYMY: [= C, F, GW, K, Mo, Pa, RAB, Va, W, WH3, Y; = P. flexuosum - G, Z, misapplied; = Koellia flexuosa - S, misapplied]
PHENOLOGY: Jun-Aug; Sep-Oct.
HABITAT: Bogs, wet meadows, moist to wet forests.
COMMENTS: ME west to MN, KS, and OK, south to FL and TX. A diploid and tetraploid species (n = 20 and 40).
RANGE MAP:

Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Lamiaceae Lindley 1836 or LABIATAE A.L. de Jussieu 1789 (Mint Family)
SUMMARY: A family of about 230-250 genera and 6700-7170 species, herbs, shrubs, vines, and trees, cosmopolitan. The placement in the Lamiaceae of several genera traditionally placed in Verbenaceae (e.g. Clerodendrum) is strongly supported by several lines of evidence.
REFERENCE: Harley et al. in Kadereit (2004).
ABOUT GENUS (Weakley Flora)
Pycnanthemum Michx. (Mountainmint)
SUMMARY: A genus of 20-25 species, herbs, of temperate North America. Pycnanthemum remains a complicated and difficult group, with speciation apparently having proceeded by allopolyploidy, autoploidy, and aneuploidy. Numerous aberrant forms and (probably) sterile hybrids complicate identification and understanding.
REFERENCE: Chambers (1993); Grant & Epling (1943)=Z; Chambers & Hamer (1992)=Y; Harley et al. in Kadereit (2004).

HERBARIUM RESOURCES

SERNEC: Find Pycnanthemum tenuifolium in Southeast Regional Network of Experts and Collections (if available)
UNC SERNEC: Find Pycnanthemum tenuifolium in University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)

WEB RESOURCES

USDA: Find Pycnanthemum tenuifolium in USDA Plants
NPIN: Find Pycnanthemum tenuifolium in NPIN Database
FNA: Find Pycnanthemum tenuifolium in the Flora of North America (if available)
Google: Search Google for Pycnanthemum tenuifolium

NCBG IMAGE RECORDS

ID IMAGE1: 18554
ID IMAGE2: 0
ID IMAGE3: 18554

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36 photo(s) available in the Image Gallery

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