[photo, Mint blossoms, Glen Burnie, Maryland]
  • Maryland Herbs
  • Invasive & Introduced Herbs
  • Botanically, herbaceous plants are defined as "any seed-bearing plant that does not have a woody stem and dies down to the ground after flowering."

    Mint blossoms, Glen Burnie, Maryland, September 2014. Photo by Diane F. Evartt.

    Some herbs are extremely poisonous, and others are dangerous if handled improperly. If one such herb is eaten or handled, first aid is required.


    Name Scientific Name Blooms
    Alumroot, Hairy Heuchera villosa Michx. July - Oct.
    Cabbage, Skunk Symplocarpus foetidus (L.) Salisb. ex W.P.C. Barton March - April
    Catchfly, Sticky Silene caroliniana Walter April - May
    Cattail, Broadleaf Typha latifolia L. May - June
    Cattail, Narrowleaf Typha angustifolia L. June - July
    Fern, Royal Osmunda regalis L. Aug.
    Mountainmint, Hoary Pycnanthemum incanum (L.) Michx. July - Aug.

     [photo, Adam's Needle (Yucca  filamentosa L.), Glen Burnie, Maryland]
    Needle, Adam's Yucca filamentosa L. June - Sept.
    Ragwort, Golden Packera aurea (L.) Á. Löve & D. Löve April - Aug.
    Root, Bowman's Gillenia trifoliata (L.) Moench May - July
    Root, Culver's Veronicastrum virginicum (L.) Farw. June - Sept.
    Rush, Canada Juncus canadensis J. Gay ex Laharpe July - Aug.
    Rush, Common Juncus effusus L. June - Sept.

    Adam's Needle (Yucca filamentosa L.), Glen Burnie, Maryland, June 2015. Photo by Diane F. Evartt.

    Snakeroot, White Ageratina altissima (L.) R.M. King & H. Rob. var. altissima June - Aug.
    Sneezeweed, Common Helenium autumnale L. Aug. - Nov.
    Thoroughwort, Hyssopleaf Eupatorium hyssopifolium L. Aug. - Oct.
    Threesquare, Common Schoenoplectus pungens (Vahl) Palla var. pungens June - Sept.
    Ticktrefoil, Panicledleaf Desmodium paniculatum (L.) DC. July - Sept.
    Valerian, Greek Polemonium reptans L. April - June
    Wildrice, Annual Zizania aquatica L. June - Sept.
    Woolgrass Scirpus cyperinus (L.) Kunth Aug. - Sept.


    Name Scientific Name Blooms
    Beefsteakplant Perilla frutescens June - Sept.
    Bugle, Common Ajuga reptans April - May
    Barberry, Japanese Berberis thunbergii April - May
    Buttercup, Fig Ranunculus ficaria March - June
    Deadnettle, Henbit Lamium amplexicaule March - May
    Deadnettle, Purple Lamium purpureum April - June
    Ivy, Ground Glechoma hederacea April - June
    Knapweed, Spotted Centaurea maculosa July - Aug.
    Knotweed, Giant Fallopia sachalinensis July - Aug.
    Loosestrife, Purple Lythrum salicaria July - Aug.

     [photo, Spearmint (Mentha spicata), Glen Burnie, Maryland]
    Mustard, Garlic Alliaria petiolata May - June
    Privet, Border Ligustrum obtusifolium May - June
    Sorghum Sorghum bicolor July - Oct.
    Spearmint Mentha spicata June - Aug.
    Strawberry, Indian Duchesnea indica April - June

    Spearmint (Mentha spicata), Glen Burnie, Maryland, September 2014. Photo by Diane F. Evartt.

     [photo, Tansy (Tanacetum vulgare L.), Glen Burnie, Maryland]
    Tansy, Common Tanacetum vulgare L. Aug. - Sept.
    Thistle, Bull Cirsium vulgare July - Sept.
    Thistle, Canada Cirsium arvense June - Aug.
    Thistle, Musk Carduus natans June - Oct.
    Thistle, Spiny Plumeless Carduus acanthoides July - Oct.

    Tansy (Tanacetum vulgare L.), Glen Burnie, Maryland, September 2015. Photo by Diane F. Evartt.

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