Plant Index


 
 
 
 

Houstonia montana

Houstonia montana Small

roan mountain bluet

Houstonia montana (Roan Mountain Bluet)
Image ID: 21001
Image by: Cressler, Alan M.
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: HOMO5
SCIENTIFIC NAME: Houstonia montana
Include in WOTAS: 0
Publish to Web: 1
Last Modified: 2020-01-01

GENUS INDEX

GENUS CODE: HOUST
GENUS SCIENTIFIC: Houstonia
GENUS AUTHORITY: L.
GENUS COMMON: Bluet
GENUS SUMMARY: The generic limits of Houstonia, Hedyotis, Oldenlandia, and Stenaria have been controversial, with much shuffling of generic configuration. It now appears that Houstonia should be recognized as a genus separate from Hedyotis and Oldenlandia, with Stenaria included in Houstonia (Guo et al. 2013; Wikström et al. 2013, and other references).
GENUS IDENTIFICATION: Identification notes: In the key below, all leaf measurements and length/width ratios are based on median cauline leaves.
GENUS REFERENCES: Terrell (1959)=Z; Terrell (1991)=Y; Terrell (1996)=X; Rogers (1987)=Q; Ward (2004c)=V; Church & Taylor (2005); Church (2003); Turner (1995b)=U; Terrell (2001)=M; Rogers (2005); Terrell (2007); Guo et al. (2013); Wikström et al. (2013). Key adapted in part from the references.

FAMILY INDEX

FAMILY CODE: RUBIAC
FAMILY SCIENTIFIC: Rubiaceae
FAMILY AUTHORITY: A.L. de Jussieu 1789
FAMILY COMMON: Madder Family
FAMILY SUMMARY: A family of about 630-650 genera and 10,200-13,000 species, trees, shrubs, vines, and rarely herbs, cosmopolitan, but especially diverse in tropical and subtropical areas. Subfamily and tribe classification follows Bremer & Eriksson (2009).
FAMILY REFERENCE: Bremer & Eriksson (2009); Rogers (1987, 2005).

NCBG DESCRIPTIVES

INTRO:
STEMS:
LEAVES:
INFLORESCENCE:
FLOWERS:
FRUITS:
COMMENTS:
HEIGHT:

DURATION:
HABIT:

LEAF ARRANGEMENT:
LEAF COMPLEXITY:
LEAF RETENTION:

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

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

FRUITING PERIOD: Jul-Aug.

DISTRIBUTION
HABITAT TYPE:
NATIVE RANGE:

HORTICULTURAL
Plant Sale Text:

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE:
LIGHT EXPOSURE:
MINIMUM HARDINESS ZONE:
MAXIMUM HARDINESS ZONE:
GERMINATION CODE:
WILDLIFE VALUE:
DEER RESISTANCE:

USDA PLANTS DATABASE

USDA Symbol: HOMO5
USDA Common Name:
Native Status:
Distribution:
Duration:
Growth Habit:

2018 Natural Heritage Program List of Rare Plant Species of North Carolina

NHP IDS RANKROUNDED S RANKG RANKROUNDED G RANKSTATE STATUSFEDERAL STATUS
20115 S2 S2 G5T2 T2 E E

This information is derived from the 2018 North Carolina Natural Heritage Program List of Rare Plant Species.

WEAKLEY FLORA

SCIENTIFIC NAME: Houstonia montana
COMMON NAME: Roan Mountain Bluet
SYNONYMY: [= S, W; < Houstonia purpurea - RAB; = Houstonia purpurea Linnaeus var. montana (Small) Terrell - K, X, Y, Z; < Hedyotis purpurea - Q; = Hedyotis purpurea (Linnaeus) Torrey & A. Gray var. montana (Small) Fosberg]
PHENOLOGY: Jun-Jul; Jul-Aug.
HABITAT: In crevices of rock outcrops at the summits of high elevation peaks of the Southern Blue Ridge, also in thin, frost-heaved, gravelly soils of grassy balds near summit outcrops, from 1250-1950 m in elevation.
COMMENTS: This species is endemic to the high Blue Ridge of nw. NC, ne. TN, and sw. VA, most notably occurring on Roan Mountain, Grandfather Mountain, Bluff Mountain, and Three Top Mountain. It was first noted by Asa Gray in 1841, who described it as a marked dwarfish variety. There has been debate over whether it is not indeed merely a weather-induced form, but recent studies show that it is distinct. In addition to the characters given above in the key, H. montana also differs from H. purpurea in having larger calyx lobes, corolla, capsules, and seeds. This species was recently found in sw. VA, at Grayson Highlands State Park, Grayson County (G.P. Fleming & K.D. Patterson, pers. comm., 2013). See Terrell (1959), Yelton (1974), and Terrell (1978) for further discussion.
RANGE MAP: Houstonia montana.png

Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Rubiaceae A.L. de Jussieu 1789 (Madder Family)
SUMMARY: A family of about 630-650 genera and 10,200-13,000 species, trees, shrubs, vines, and rarely herbs, cosmopolitan, but especially diverse in tropical and subtropical areas. Subfamily and tribe classification follows Bremer & Eriksson (2009).
REFERENCE: Bremer & Eriksson (2009); Rogers (1987, 2005).
ABOUT GENUS (Weakley Flora)
Houstonia L. (Bluet)
SUMMARY: The generic limits of Houstonia, Hedyotis, Oldenlandia, and Stenaria have been controversial, with much shuffling of generic configuration. It now appears that Houstonia should be recognized as a genus separate from Hedyotis and Oldenlandia, with Stenaria included in Houstonia (Guo et al. 2013; Wikström et al. 2013, and other references).
REFERENCE: Terrell (1959)=Z; Terrell (1991)=Y; Terrell (1996)=X; Rogers (1987)=Q; Ward (2004c)=V; Church & Taylor (2005); Church (2003); Turner (1995b)=U; Terrell (2001)=M; Rogers (2005); Terrell (2007); Guo et al. (2013); Wikström et al. (2013). Key adapted in part from the references.

HERBARIUM RESOURCES

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

WEB RESOURCES

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

IMAGE USE RECORDS

ID IMAGE: 21001 - Primary Image FloraQuest Plant Detail Page (Landscape Preferred)
ID IMAGE1: 21001 - Primary Image WOTAS
ID IMAGE2: 0 - Secondary Image WOTAS
ID IMAGE3: 23909 - Primary Image Plant Sale Sign (Landscape Only)
ID IMAGE4: 0 - Primary Image New Plant Sale Label (Portrait Only)

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48 photo(s) available in the Image Gallery

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