1. Family: Lamiaceae Martinov
    1. Physostegia Benth.

      1. This genus is accepted, and its native range is N. America.

    [LKGF]

    Harley, R.M. et al. (2004). Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Springer-Verlag, Berlin, Heidelberg, New York.

    Habit
    Rhizomatous perennial herbs, glabrous or subglabrous below inflorescence, hairs simple
    Leaves
    Leaves mostly sessile, often amplexicaul, the lowest sometimes petiolate
    Inflorescences
    Inflorescence racemoid, flowers subsessile
    Bracteoles
    Bracteoles absent
    Calyx
    Calyx actinomorphic, somewhat inflated in fruit, 5-lobed, lobes equal
    Corolla
    Corolla strongly 2-lipped, 4-lobed (1/3), white to reddish violet, posterior lip flat to slightly hooded, usually entire or emarginate, tube exannulate
    Stamens
    Stamens equal or anterior pair longer, filaments villous, thecae parallel, not confluent, suture bordered with 1-6 (-10) small teeth
    Disc
    Disc with abaxial lobe equal to twice as long as ovary
    Stigma
    Stigma-lobes equal to subequal
    Fruits
    Nutlets trigonous, glabrous, smooth or rarely verrucate.
    Note
    2n = 38, 76.  Twelve species. With a base number of 19, Physostegia is probably of amphiploid origin from parents with n = 9 and 10 (Cantino 1985b).  One parent may be Warnockia (n = 10), the genus with the closest phenetic relationship to Physostegia (Ca
    Distribution
    Northern Canada to northern Mexico.
    [LKGF]
    Use
    Physostegia virginiana (L.) Benth. is widely grown as an ornamental and sometimes naturalised elsewhere.

    Images

    Distribution

    Native to:

    Alabama, Alberta, Arkansas, British Columbia, Connecticut, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Labrador, Louisiana, Maine, Manitoba, Maryland, Mexico Northeast, Mexico Northwest, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Hampshire, New Mexico, New York, Newfoundland, North Carolina, North Dakota, Northwest Territorie, Ohio, Oklahoma, Ontario, Oregon, Pennsylvania, Québec, Rhode I., Saskatchewan, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, Yukon

    Introduced into:

    Great Britain

    Physostegia Benth. appears in other Kew resources:

    First published in Edwards's Bot. Reg. 15: t. 1289 (1829)

    Accepted by

    • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Lamiaceae Key Genus Fact Sheets
    • Harley RM, Atkins S, Budantsev AL, Cantino PD, Conn BJ, Grayer R, Harley MM, de Kok RPJ, Krestovskaja T, Morales R, Paton AJ, Ryding O, and Upson T. 2004. Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Sp
    • Cantino, Contr. Gray Herb. 211: 1-105 (1982).
    • Physostegia Benth., Edward's Bot. Reg. 15: sub t. 1289 (1829)

    Sources

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Lamiaceae Key Genus Fact Sheets
    Nina Davies, Gemma Bramley and Don Kirkup, Royal Botanic Gardens, Kew
    http://creativecommons.org/licenses/by/3.0